Updated on 2024/12/05

Information

 

写真a

 
ADACHI CHIHAYA
 
Organization
Faculty of Engineering Department of Applied Chemistry Professor
Abolition organization Academia-Industry molecular systems for Devices Research and Education Center（Concurrent）
Abolition organization （Concurrent）
Center for Organic Photonics and Electronics Research(OPERA) （Concurrent）
Center for Future Chemistry （Concurrent）
School of Engineering （Concurrent）
Graduate School of Engineering （Concurrent）
Title
Professor
Contact information
メールアドレス
Tel
0928026920
Profile
Researches on organic optoelectronic materials and devices. We develop organic electronic devices such as organic light emitting diode (OLED), organic solar cells, organic transistors, organic laser diodes. We design and snthesis novel electronic materials and also establish the research area of photophysics and device physics.
Homepage
External link

Degree

  • PhD

Research History

  • 平成3年~平成8年　株式会社　リコー　化成品技術研究所　研究員

    平成3年~平成8年　株式会社　リコー　化成品技術研究所　研究員

  • 平成8年～平成11年　信州大学　繊維学部　機能高分子学科　助手 平成11年～平成13年　プリンストン大学　Center for Photonics and Optoelectronic Materials　(POEM) 研究員 平成13年～平成17年　千歳科学技術大学　光科学部　物質光科学科　教授

Research Interests・Research Keywords

  • Research theme：Researches on organic electronics materials and device physics; organic light emitting diode, organic laser, organic transistor and organic solar cell

    Keyword：Organic electronics materials, organic light emitting diode, organic laser, organic transistor, organic solar cell, organic superconductor

    Research period： 2005.10

Awards

  • Highly Cited Researchers 2023

    2024.1  

    　More details

    2012年にNatureに発表後、世界を先導して開発を進めてきた熱活性化遅延蛍光（TADF)の科学技術が高く評価された。本研究成果が、物理の根幹に係わる学理の開拓に繋がっていることを実証している。

  • 紫綬褒章

    2023.4  

    　More details

    黎明期における世界初の電子輸送材料の発見によるOLED の基本構造の構築、熱活性化遅延蛍光（TADF：Thermally activated delayed fluorescence）技術の開拓は特筆すべき研究業績であり、材料化学、光化学、物性物理の学理の深化とともに、実社会におけるディスプレイ産業の振興にも多大な貢献を果たしたことなどが高く評価された。

  • 第３８回（2022 年度） 櫻井健二郎氏記念賞

    2023.2   一般財団法人光産業技術振興協会（OITDA）   高効率有機発光材料の創製と光デバイスへの応用

    　More details

    大型テレビなどに用いられている有機発光ダイオード（OLED）の研究開発に黎明期から携わり、電子輸送層を有するダブルヘテロ構造をいち早く提案するとともに、発光層に従来の蛍光材料に替えて燐光材料を用いれば内部量子効率がほぼ１００％となることを実証した。また、分子設計の自由度が大きく、レアメタル・フリーな熱活性化遅延蛍光材料を創製し、ほぼ１００％の内部量子効率のＯＬＥＤを実現した。さらに、色純度を上げて色域を広げた OLED の開発や有機半導体レーザーへの挑戦にも意欲的に取り組んできている。
    このように、有機分子の発光についての深い知見と洞察に基づき、高効率な有機発光材料を創製することにより、ＯＬＥＤの学術的基盤の構築に貢献するとともに、その実用化に向けた研究開発を主導し、我が国の光産業とりわけディスプレイ分野の発展に貢献しており、本賞に相応しい業績と考える。

  • Highly Cited Researchers 2022

    2023.1  

    　More details

    2012年にNatureに発表後、世界を先導して開発を進めてきた熱活性化遅延蛍光（TADF)の科学技術が高く評価された。本研究成果が、物理の根幹に係わる学理の開拓に繋がっていることを実証している。

  • 2022年（第92回）服部報公会「報公賞」

    2022.10   公益財団法人服部報公会   「熱活性化遅延蛍光分子の創成と高効率OLEDの実現」

    　More details

    有機発光ダイオード（有機 EL, OLED）は、スマートフォンやタブレット端末の小型ディスプレイから大型 TV の画面に至るまで幅広い先端電子デバイスにおいて実用化が進んでいる。1990 年代後半から、第二世代の発光分子として白金やイリジウム等を含有する有機金属錯体の研究が盛んに行われ実用化に至っているが、分子設計の自由度の低さや高コスト、更には希少資源などの問題を抱えていた。
    これに対して、熱活性化遅延蛍光（TADF）に着目し、緻密な量子化学計算と巧みな分子設計によって、100%の内部量子効率を単純な芳香族化合物によって実現した。高効率の TADF を実現するために、励起一重項エネルギーと励起三重項エネルギーの差が小さい（100 meV 以下）化合物を設計して、通常ではスピン状態が異なるために遷移確率の低い励起三重項状態から励起一重項状態への遷移を熱的に可能とした（変換効率 100%）。この新規分子を発光層に用いた OLED において、電流励起によって得られた励起三重項状態を励起一重項状態に変換することによって、100%の内部量子効率を有する OLED を実現している。TADF 分子は比較的単純な芳香族化合物であることから、世界的にも多くの研究が追随された（論文の引用回数の多さが物語っている）。
    また、従来開発が困難であった青色発光 TADF 分子の開発にも成功しており、さらに、TADF の派生技術として１時間以上の連続発光が可能な有機蓄光現象など、有機電荷移動（CT）状態の精密制御によって新基軸の開拓に繋がっている。
    以上のように、理論に基づいた分子設計によって実用可能なエレクトロニクス材料を創出しており、学術的にも工業的にも高いレベルであると判断される。特に、有機CT 状態の精密制御がデバイス性能の向上に重要であることを体系的に明らかにしたことは、有機デバイス分野の発展に大きく貢献した。Nature およびその姉妹誌に掲載された論文の引用数（TADF の論文は 5000 件）（総論文の引用数は 75571 件）は群を抜いており、376 件の特許出願も注目に値する。また、実用化に関しては、九大発のベンチャー（（株）Kyulux）が設立され、世界初の TADF 材料を用いた OLED パネルが台湾の企業（WiseChip 社）から上市され、実用化に至っている。

  • 2022年（第92回）服部報公会「報公賞」

    2022.10   公益財団法人服部報公会  

    　More details

    「熱活性化遅延蛍光分子の創成と高効率OLEDの実現」

    researchmap

  • 第22回（2021年度）応用物理学会業績賞

    2022.3   革新的な材料創成による有機発光デバイスの高性能化

    　More details

    革新的な材料創成による有機発光デバイスの高性能化

    有機発光ダイオード（Organic Light-Emitting Diode: OLED，あるいは，有機EL）は，1990年代後半からカーナビゲーション用ディスプレイとしての製品化が始まり，2010年代からスマートフォン，大型テレビ，医療機器，車載パネル，照明パネル等，産業的に大きな広がりを示している。1980年代後半の黎明期から現在に至るまで一貫してOLEDの研究に取り組み，OLEDの設計指針を示し，新規発光材料を設計・合成することで，当該分野を先導する革新的な成果を挙げた。

    OLEDの発光原理は，蛍光（第1世代），燐光（第2世代），熱活性化遅延蛍光（TADF）（第3世代）である。全ての世代で，重要な役割を果たした。第1世代のOLEDは当初，電子輸送層・発光層／正孔輸送層の二層構造であったが，電子輸送層／発光層／正孔輸送層なるダブルヘテロ構造により高効率化を実現した。ダブルヘテロ構造はその後のOLEDの基本構造となった。

    第1世代の蛍光OLEDの内部量子効率は25%程度であったが，燐光材料を発光層に用いたダブルヘテロ構造OLEDにより，内部量子効率が100%となること実証し，第2世代燐光OLEDの有用性を示した。この後，TADFを発現する分子群を設計・合成し，燐光材料とは異なるレアメタルを含有しない比較的単純な芳香族化合物でありながら内部量子効率100%の第3世代TADF OLEDを実現した。究極のOLED発光材料としての地位を確立し，多数の研究活動を触発している。さらに，TADF材料に蛍光材料を添加した第4世代OLEDにおいて，TADF材料と同等な内部量子効率を有する高色純度を実現している。

    また、TADF OLEDに関する100件を超える特許出願を行い，それをもとに2015年に九州大学発ベンチャーである(株) Kyulux を設立している。

  • Highly Cited Researchers 2021

    2022.1  

    　More details

    2012年にNatureに発表後、世界を先導して開発を進めてきた熱活性化遅延蛍光（TADF)の科学技術が高く評価された。特に今年度は物理分野での選定であり、本研究成果が、物理の根幹に係わる学理の開拓に繋がっていることを実証している。

  • Highly Cited Researchers 2020

    2021.1  

    　More details

    2012年にNatureに発表後、世界を先導して開発を進めてきた熱活性化遅延蛍光（TADF)の科学技術が高く評価された。特に今年度は物理分野での選定であり、本研究成果が、物理の根幹に係わる学理の開拓に繋がっていることを実証している。

  • 応用物理学会優秀論文賞

    2020.9   応用物理学会  

  • Highly Cited Researchers 2019

    2020.1  

    　More details

    2012年にNatureに発表後、世界を先導して開発を進めてきた熱活性化遅延蛍光（TADF)の科学技術が高く評価された。

  • 第24回名古屋メダル「シルバーメダル」

    2019.2   公益財団法人ＭＳＤ生命科学財団  

    　More details

    2012年にNature誌に発表し、その後、世界を先導して研究開発を進めてきた熱活性化遅延蛍光（TADF)の研究成果が基礎学術の視点（化学の新しい学理の開拓）から広く認められた。

  • Highly Cited Researchers 2018

    2019.1  

    　More details

    2012年にNature誌に発表し、その後、世界を先導して研究開発を進めてきた熱活性化遅延蛍光（TADF)の研究成果が広く認められたことを意味している。

  • 文部科学大臣表彰　科学技術賞

    2018.4   文部科学省  

  • 仁科記念賞

    2017.11   仁科記念財団  

    　More details

    100％の三重項励起子の励起一重項状態への遷移が実現された。これにより、100％の電流ー光変換を実現する高効率有機EL素子の実現のみならず、分子励起子のスピン状態の基礎的な理解が進み、分子物性物理学にも大きな貢献を果たした。

  • 応用物理学会　第10回（2016年度）フェロー表彰

    2016.9   応用物理学会  

  • トムソン・ロイター Research Front Award

    2016.7   トムソンロイター  

    　More details

    作業中

  • SID Fellow Awards

    2014.5   SID  

    　More details

    【受賞コメント】TADFは骨格を限定せず、有機材料設計の無限の可能性を生かした分子設計が可能であるため、RGB全ての色において、高効率な材料の創出が可能となります。今後、有機ELの新しいアプリケーションが各企業から販売され身近なものになるに伴って、TADF材料が世界中で使われ、有機ELの世界的普及に貢献できることを願っております。

  • 有機EL討論会第6回業績賞

    2013.3   有機EL討論会  

  • 有機EL討論会第6回業績賞

    2013.3   有機EL討論会   熱活性型遅延蛍光材料を用いた高効率有機ELの開発

  • 文部科学大臣表彰 科学技術賞

    2007.4   文部科学省   有機ＥＬの技術の振興

  • nano-tech 2004　国際ナノテクノロジー総合展・技術会議　ナノテック大賞IT・エレクトロニクス部門受賞

    2004.3  

  • 第1回　応用物理学会　有機分子・バイオエレクトロニクス分科会　論文賞

    2003.7   “有機ＥＬに関する研究”

  • 千歳科学技術大学教育研究貢献賞受賞

    2003.3  

  • 第2回　船井情報科学振興財団振興賞　エレクトロニクス部門

    2003.3   “高効率有機エレクトロルミネッセンス（有機EL）素子の研究開発”

▼display all

Papers

  • Anti‐Stokes Emission Utilizing Reverse Intersystem Crossing Reviewed

    Chihaya Adachi, Shintaro Kohata, Hajime Nakanotani, Takuya Hosokai, Takuma Yasuda, Youichi Tsuchiya

    Angewandte Chemie International Edition   e202419323   2024.11   （ ISSN:1433-7851 eISSN:1521-3773 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Photon‐upconversion (PUC) processes in organic molecular systems, such as triplet‐triplet upconversion and hot‐band absorption, are promising technologies for future energy harvesting. Although these processes can generate high‐energy excitons compared to excitation energy, a PUC process with a high yield and no energy loss has not been established and, therefore, is highly desired. Here, we propose an alternative PUC mechanism that uses reverse intersystem crossing on thermally activated delayed fluorescence (TADF) molecules. This process combines a triplet sensitizer and a TADF molecule, generating a triplet in the former and transferring it to the latter. Specifically, the triplet energy transfer from Ir(ppy)3 (sensitizer) to CzBSe (TADF) results in anti‐Stokes emission with an anti‐Stokes energy of 0.18 eV. We found that the triplet energy transfer rate strongly depends on the triplet radiative decay rate of TADF molecules and the difference in Gibbs energy between the energy acceptor and donor. Our findings will contribute to understanding triplet energy transfer dynamics in organic energy donor‐acceptor systems and will lead to various applications, such as future optical cooling systems.

    DOI： 10.1002/anie.202419323

    Web of Science

    PubMed

    researchmap

  • Efficient Electroluminescence from Organic Fluorophore‐Containing Perovskite Films Reviewed

    Toshinori Matsushima, Chuanjiang Qin, Teng Teng, Narayanaswamy Kamatham, Lydia Sosa Vargas, David Kreher, Benoit Heinrich, Tomohiro Ishii, Shinobu Terakawa, Matthew R. Leyden, Atula S. D. Sandanayaka, Fatima Bencheikh, Kiyoshi Miyata, Ken Onda, Yoshihiko Kanemitsu, Fabrice Mathevet, Chihaya Adachi

    Advanced Materials   e2408775   2024.10   （ ISSN:0935-9648 eISSN:1521-4095 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Two‐dimensional perovskites containing an organic fluorophore can be a unique emitter for light‐emitting diodes (LEDs). However, external quantum efficiencies (EQEs) of fluorophore‐containing perovskite LEDs reported thus far are still very low. In this study, these are able to boost the EQE to ≈10% by choosing an organic fluorophore with appropriate energy levels for the perovskite structure organization. In the fluorophore‐containing perovskite LEDs, carrier transport and exciton formation take place in the perovskite's metal halide framework, thereby avoiding the direct formation of nonradiative triplet excitons on the organic fluorophores. Subsequently, the bright triplet excitons formed in the metal halide framework are transferred to form the radiative singlet states of the organic fluorophores, leading to efficient electroluminescence (EL) from the organic fluorophores regularly dispersed inside the perovskite structure. Unexpectedly higher light‐outcoupling efficiency, which is caused by the light scattering in the polycrystalline perovskite layer, will be another reason for efficient EL. These findings will contribute toward the fabrication of LED‐based products with high performance at a low cost.

    DOI： 10.1002/adma.202408775

    Web of Science

    Scopus

    PubMed

    researchmap

  • Unexplored Exciplex Formation by Dual Excitation of Donor and Acceptor Layers Optically and Electrically Reviewed

    Tharindu P. B. Rajakaruna, Xun Tang, Hajime Nakanotani, Chihaya Adachi

    Advanced Optical Materials   12 ( 28 )   2024.10   （ ISSN:2195-1071 eISSN:2195-1071 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Electron donor and acceptor interactions are the fundamentals for the emergence of optoelectronic functions in most organic devices. In particular, exciplexes, which hold the possibility to utilize dark triplets, are widely investigated in organic light‐emitting diodes. However, the relatively low radiative decay rate with a low photoluminescence quantum yield poses further advanced challenges. Traditionally, it is well recognized that exciplexes are formed through a charge transfer process, i.e., direct electron transfer, by photoexciting either a donor or an acceptor component. In this study, the focus is on a long‐range exciplex system where tris(4‐carbazoyl‐9‐ylphenyl)amine (TCTA) and 2,4,6‐tris[3‐(diphenylphosphinyl)phenyl]−1,3,5‐triazine (PO‐T2T) serve as the donor and acceptor, respectively. Moreover, 1,2‐bis(triphenylsilyl) benzene (UGH2) and bis[2‐(diphenylphosphino)phenyl]ether oxide (DPEPO), having a wide energy gap and a high triplet energy level, are employed as the double insulating layer to suppressing direct electron transfer between the donor and acceptor. The indirect through‐space exciplex formation is demonstrated by the simultaneous excitation of both donor and acceptor layers optically and electrically, providing a new route for exciplex formation.

    DOI： 10.1002/adom.202401237

    Web of Science

    Scopus

    researchmap

    Other Link： https://onlinelibrary.wiley.com/doi/pdf/10.1002/adom.202401237

  • Organic thermoelectric device utilizing charge transfer interface as the charge generation by harvesting thermal energy Reviewed

    Shun Kondo, Mana Kameyama, Kentaro Imaoka, Yoko Shimoi, Fabrice Mathevet, Takashi Fujihara, Hiroshi Goto, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi

    Nature Communications   15 ( 1 )   8115   2024.9   （ eISSN:2041-1723 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41467-024-52047-5

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s41467-024-52047-5

  • Donor-only substituted benzene achieves thermally activated delayed fluorescence Reviewed

    Masashi Mamada, Sawako Yada, Masahiro Hayakawa, Ryota Uchida, Hiroshi Katagiri, Takuji Hatakeyama, Chihaya Adachi

    Communications Chemistry   7 ( 1 )   212   2024.9   （ ISSN:2399-3669 eISSN:2399-3669 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s42004-024-01301-4

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s42004-024-01301-4

  • Modified Prompt and Delayed Kinetics in a Strongly Coupled Organic Microcavity Containing a Multiresonance TADF Emitter Reviewed

    Tomohiro Ishii, Juan B. Pérez-Sánchez, Joel Yuen-Zhou, Chihaya Adachi, Takuji Hatakeyama, Stéphane Kéna-Cohen

    ACS Photonics   11 ( 10 )   3998 - 4007   2024.9   （ ISSN:2330-4022 eISSN:2330-4022 ）

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acsphotonics.4c00488

    Web of Science

    Scopus

    researchmap

  • Efficient photosensitized luminescence from Eu<sup>3+</sup> in inert nanocrystals via ligand coordination Reviewed

    Kenichi Goushi, Yusaku Kashiwagi, Chihaya Adachi

    Japanese Journal of Applied Physics   63 ( 9 )   09SP31 - 09SP31   2024.9   （ ISSN:0021-4922 eISSN:1347-4065 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Luminescent lanthanide ions incorporated in sodium yttrium fluoride nanocrystals are promising as new luminescent materials in optoelectronics and bioimaging since the nonradiative transition is significantly suppressed due to the absence of high-energy vibrational modes. To prepare optically and electrically active nanocrystals, we explored organic ligands that allow efficient triplet energy transfer to Eu<sup>3+</sup> incorporated into nanocrystals, resulting in an efficient photosensitization effect in colloidal solutions and films. Further, we applied these emitting nanocrystals to light-emitting devices and observed the electroluminescence.

    DOI： 10.35848/1347-4065/ad760d

    Web of Science

    Scopus

    researchmap

    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/ad760d/pdf

  • Effect of Multiple Acceptor Structures in Electron Transport Materials on Operational Lifetime of Blue Thermally Activated Delayed Fluorescence Organic Light‐Emitting Diodes Reviewed

    Shione Kiriyama, Masashi Mamada, Kenichi Goushi, Bhagya Madushani, Takuji Hatakeyama, Chihaya Adachi

    Advanced Functional Materials   34 ( 37 )   2024.9   （ ISSN:1616-301X eISSN:1616-3028 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Recent advances in organic light‐emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF)‐assisted fluorescence (TAF) attest to the great promise of this technology in practical use. However, the simultaneous realization of high efficiency and device durability in blue OLEDs remains a significant challenge. Clarification of the degradation mechanisms correlated to molecular structure and device configuration is the key to extending the device lifetime. In this study, electron transport materials incorporating two triazine units in close proximity are adopted to use in hole‐blocking and electron‐transporting layers, resulting in superior device performances. In addition, a modified photodegradation experiment reveals that the degradation origins closely relate to charge carriers. The optimization of the device according to the obtained findings leads to 4.5 times extension in the lifetime of the TAF‐OLED using a multiple resonance emitter. These results also provide guidelines for designing robust electron transport materials for blue OLEDs.

    DOI： 10.1002/adfm.202402287

    Web of Science

    Scopus

    researchmap

  • Naphthalene Diimide‐Based Hydrogen‐Bonded Organic Framework for High Electrical Conductivity and Ammonia Sensor Applications Reviewed

    Kentaro Imaoka, Hyung Suk Kim, Yusei Yamamoto, Satoshi Fukutomi, Lise‐Marie Chamoreau, Liyuan Qu, Hiroaki Iguchi, Youichi Tsuchiya, Toshikazu Ono, Fabrice Mathevet, Chihaya Adachi

    Advanced Functional Materials   2024.8   （ ISSN:1616-301X eISSN:1616-3028 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    While metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) have been widely investigated as porous conductive materials, the research on the electrical properties of HOF materials has been limited. Moreover, the electrical conductivity of HOF materials is typically several orders of magnitude lower than that of MOFs and COFs. In this work, a HOF material based on naphthalene diimide is designed and achieved a remarkable electrical conductivity of 2.9 × 10<sup>−2</sup> S cm<sup>−1</sup> after hydrazine doping, which represents the highest value reported in the HOF system to date. In addition, this material exhibits a reversible change of its electrical conductivity under exposure to ammonia which is promising for gas‐sensor applications. The demonstration reveals a new dimension of HOFs as conductive materials and opens up possibilities for new HOF‐based devices.

    DOI： 10.1002/adfm.202409299

    Web of Science

    Scopus

    researchmap

  • Molecular asymmetry and rigidification as strategies to activate and enhance thermally activated delayed fluorescence in deep-blue MR-TADF emitters Reviewed

    Rangani Wathsala Weerasinghe, John Marques dos Santos, Youhei Chitose, Tomas Matulaitis, Stuart L. Warriner, Debasish Barman, Chin-Yiu Chan, Youichi Tsuchiya, Eli Zysman-Colman, Chihaya Adachi

    Physical Chemistry Chemical Physics   26 ( 32 )   21337 - 21341   2024.8   （ ISSN:1463-9076 eISSN:1463-9084 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    Two novel deep-blue multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters, 1B-CzCrs and 2B-CzCrs, containing a fused carbazole unit were synthesized.

    DOI： 10.1039/d4cp02664k

    Web of Science

    Scopus

    PubMed

    researchmap

  • Spacer dependence of exciplex dynamics in donor/spacer/acceptor layers Reviewed

    Tharindu P.B. Rajakaruna, Xun Tang, Hajime Nakanotani, Chihaya Adachi

    Chemical Physics Letters   848   2024.8   （ ISSN:0009-2614 eISSN:1873-4448 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.cplett.2024.141390

    Web of Science

    Scopus

    researchmap

  • Thermally Stable Perovskite Solar Cells with Fluoropolymer Coating Reviewed

    Yuki Fujita, Dai Semba, Badamgarav Purev‐Ochir, Nozomi Nakamura, Telugu Bhim Raju, Toshinori Matsushima, Chihaya Adachi

    Solar RRL   8 ( 16 )   2024.8   （ ISSN:2367-198X eISSN:2367-198X ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Halide perovskites are promising as the light absorbers of solar cells with efficient solar power conversion. However, why the degradation of perovskite solar cells (PSCs), especially at high temperatures, happens has not been completely understood to date. Herein, it is shown that evaporation of 4‐tert‐butylpyridine (4‐tBP) from the hole transport layer (HTL) of 2,2',7,7'‐tetrakis(N,N‐di‐p‐methoxyphenylamino)‐9,9'‐spirobifluorene (spiro‐OMeTAD) is one of possible degradation mechanisms in PSCs at a high temperature of 85 °C. In fresh PSCs, the chemical doping of the spiro‐OMeTAD HTL with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is not so efficient because of the formation of a LiTFSI:4‐tBP complex in the HTL. When PSCs are placed at 85 °C, 4‐tBP gradually evaporates from the HTL, resulting in the dissociation of the LiTFSI:4‐tBP complex. This 4‐tBP evaporation enhances the chemical doping of spiro‐OMeTAD by LiTFSI and makes the hole transport level of the spiro‐OMeTAD HTL deeper, thereby impeding hole extraction at the perovskite/spiro‐OMeTAD/Au interfaces. Herein, the 4‐tBP evaporation by covering PSCs with a fluoro‐polymer CYTOP layer, significantly improving the high‐temperature durability of PSCs, is suppressed. The basic understanding obtained in this study would help promote the spread of more thermally durable PSC products in the future.

    DOI： 10.1002/solr.202400342

    Web of Science

    Scopus

    researchmap

    Other Link： https://onlinelibrary.wiley.com/doi/pdf/10.1002/solr.202400342

  • Simultaneous control of carrier transport and film polarization of emission layers aimed at high-performance OLEDs Reviewed

    Masaki Tanaka, Chin-Yiu Chan, Hajime Nakanotani, Chihaya Adachi

    Nature Communications   15 ( 1 )   5950   2024.7   （ eISSN:2041-1723 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    The orientation of a permanent dipole moment during vacuum deposition results in the occurrence of spontaneous orientation polarization (SOP). Previous studies reported that the presence of SOP in organic light-emitting diodes (OLEDs) lowers electroluminescence efficiency because electrically generated excitons are seriously quenched by SOP-induced accumulated charges. Thus, the SOP in a host:guest-based emission layer (EML) should be finely controlled. In this study, we demonstrate the positive effect of dipole-dipole interactions between polar host and polar emitter molecules on the OLED performance. We found that a small-sized polar host molecule that possesses both high molecular diffusivities and moderate permanent dipole moment, well cancels out the polarization formed by the SOP of the emitter molecules in the EML without a disturbance of the emitter molecules’ intrinsic orientation, leading to high-performance of OLEDs. Our molecular design strategy will allow emitter molecules to pull out the full potential of the EMLs in OLEDs.

    DOI： 10.1038/s41467-024-50326-9

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s41467-024-50326-9

  • Efficient Near‐Infrared Fluorescence in Deuterated Host–Guest System for Near‐Infrared Organic Light‐Emitting Diodes Reviewed

    Qun Yu, Yuika Tamura, Hajime Nakanotani, Masashi Mamada, Chihaya Adachi

    Advanced Optical Materials   12 ( 21 )   2024.7   （ ISSN:2195-1071 eISSN:2195-1071 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Near‐infrared organic light‐emitting diodes (NIR‐OLEDs) possess substantial potential for future valuable applications, such as a light source for sensing applications. However, the low photoluminescence quantum yield (PLQY) of NIR‐emitting molecules represents a significant impediment to these applications. In this study, the impact of the deuteration of both of host (mCP‐d<sub>20</sub>: 1,3‐Dicarbazole‐benzene‐d<sub>20</sub>) and guest (BBT‐TPA‐d<sub>28</sub>: 4,8‐bis[4‐(N,N‐diphenylamino)phenyl]benzo[1,2‐c:4,5‐c']bis[1,2,5]thiadiazole‐d<sub>28</sub>) on NIR PL properties in the host–guest codeposited film is reported. The 1 wt%‐BBT‐TPA‐d<sub>28</sub>:mCP‐d<sub>20</sub> codeposited film exhibited PLQY of 15 ± 2% with an emission peak wavelength at ≈900 nm, which is about three times higher than that of the film composed of undeuterated molecules. Importantly, the deuteration of only the host or guest does not yield the PLQY up to 15%, underlining the importance of the deuteration of both host and guest molecules in suppressing nonradiative decay processes. The NIR‐OLED with the deuterated codeposited film as an emissive layer demonstrates a maximum external electroluminescence quantum efficiency of 2.3 ± 0.2%.

    DOI： 10.1002/adom.202400932

    Web of Science

    Scopus

    researchmap

  • Hexacarbazolylbenzene: An Excellent Host Molecule Causing Strong Guest Molecular Orientation and the High‐Performance OLEDs Reviewed

    Bhagya Madushani, Masashi Mamada, Kenichi Goushi, Hiroshi Katagiri, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

    Advanced Materials   36 ( 30 )   e2402275   2024.7   （ ISSN:0935-9648 eISSN:1521-4095 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Hexacarbazolylbenzene (6CzPh), which is benzene substituted by six carbazole rings, is a simple and attractive compound. Despite the success of a wide variety of carbazole derivatives in organic light‐emitting diodes (OLEDs), 6CzPh has not received attention so far. Here, excellent performances of 6CzPh are revealed as a host material in OLEDs regarding conventional host materials. Various strategies are implemented to improve the performance of OLEDs, e.g., triplet utilization by thermally activated delayed fluorescence (TADF) and phosphorescence emitters for maximizing internal quantum efficiency, and molecular orientation control for increasing outcoupling efficiency. The present host material is suited for both criteria. Robustness of the structure and sufficiently high triplet energy enables a high external quantum efficiency with a long device lifetime. Besides, the host material boosts the horizontal molecular orientations of several guest emitters. It is noteworthy that disk‐shaped 4CzIPN marks the complete horizontal molecular orientations (Θ<sub>h</sub> = 100%, S = −0.50). These results provide an effective way of improving efficiencies without sacrificing device durability for future OLEDs.

    DOI： 10.1002/adma.202402275

    Web of Science

    Scopus

    PubMed

    researchmap

  • Visualization of Multiple-Resonance-Induced Frontier Molecular Orbitals in a Single Multiple-Resonance Thermally Activated Delayed Fluorescence Molecule Reviewed

    Jaehyun Bae, Miyabi Imai-Imada, Hyung Suk Kim, Minhui Lee, Hiroshi Imada, Youichi Tsuchiya, Takuji Hatakeyama, Chihaya Adachi, Yousoo Kim

    ACS Nano   18 ( 27 )   17987 - 17995   2024.6   （ ISSN:1936-0851 eISSN:1936-086X ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acsnano.4c04813

    Web of Science

    Scopus

    PubMed

    researchmap

  • Improved Photoluminescence, Electroluminescence, and Laser Characteristics of 1-Naphthylmethylamine-Based Quasi-Two-Dimensional Perovskite Films at Lower Temperatures Reviewed

    Ryotaro Nasu, Xun Tang, Adikari Mudiyanselage Chathuranganie Senevirathne, Toshinori Matsushima, Chihaya Adachi

    The Journal of Physical Chemistry C   128 ( 26 )   10974 - 10981   2024.6   （ ISSN:1932-7447 eISSN:1932-7455 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acs.jpcc.4c01763

    Web of Science

    Scopus

    researchmap

  • “Core–Shell” Wave Function Modulation in Organic Narrowband Emitters Reviewed

    Masahiro Hayakawa, Xun Tang, Yuta Ueda, Hayato Eguchi, Masakazu Kondo, Susumu Oda, Xiao-Chun Fan, Gerardus N. Iswara Lestanto, Chihaya Adachi, Takuji Hatakeyama

    Journal of the American Chemical Society   146 ( 27 )   18331 - 18340   2024.6   （ ISSN:0002-7863 eISSN:1520-5126 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/jacs.4c02598

    Web of Science

    Scopus

    PubMed

    researchmap

  • Impact of Spontaneous Orientational Polarization on Triplet–Triplet Upconversion-Based Blue Organic Light-Emitting Diodes Reviewed

    Shunta Kakumachi, Hajime Nakanotani, Yuto Nagasaki, Chihaya Adachi

    ACS Applied Materials &amp; Interfaces   16 ( 24 )   31392 - 31398   2024.6   （ ISSN:1944-8244 eISSN:1944-8252 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acsami.4c02821

    Web of Science

    Scopus

    PubMed

    researchmap

  • A Boron, Nitrogen, and Oxygen Doped π‐Extended Helical Pure Blue Multiresonant Thermally Activated Delayed Fluorescent Emitter for Organic Light Emitting Diodes That Shows Fast <i>k</i><sub>RISC</sub> Without the Use of Heavy Atoms Reviewed

    Rangani Wathsala Weerasinghe, Subeesh Madayanad Suresh, David Hall, Tomas Matulaitis, Alexandra M. Z. Slawin, Stuart Warriner, Yi‐Ting Lee, Chin‐Yiu Chan, Youichi Tsuchiy, Eli Zysman‐Colman, Chihaya Adachi

    Advanced Materials   36 ( 26 )   e2402289   2024.6   （ ISSN:0935-9648 eISSN:1521-4095 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Narrowband emissive multiresonant thermally activated delayed fluorescence (MR‐TADF) emitters are a promising solution to achieve the current industry targeted color standard, BT.2020, for blue color without using optical filters, aiming for high efficiency organic light‐emitting diodes (OLEDs). However, their long triplet lifetimes, largely affected by their slow reverse intersystem crossing rates, adversely affect device stability. In this study, a helical MR‐TADF emitter (f‐DOABNA) has been designed and synthesized. Because of its π‐delocalized structure, f‐DOABNA possesses a small singlet‐triplet gap, ΔE<sub>ST</sub>, and displays simultaneously an exceptionally faster reverse intersystem crossing rate constant, k<sub>RISC</sub>, of up to 2 × 10<sup>6</sup> s<sup>−1</sup> and a very high photoluminescence quantum yield, Φ<sub>PL</sub>, of over 90% in both solution and doped films. The OLED with f‐DOABNA as the emitter achieved a narrow deep‐blue emission at 445 nm (full width at half‐maximum of 24 nm) associated with CIE coordinates of 0.150, 0.041, and showed a high maximum external quantum efficiency, EQE<sub>max</sub>, of ∼20%.

    This article is protected by copyright. All rights reserved

    DOI： 10.1002/adma.202402289

    Web of Science

    Scopus

    PubMed

    researchmap

  • Stable pure-green organic light-emitting diodes toward Rec.2020 standard Reviewed

    Xun Tang, Tuul Tsagaantsooj, Tharindu P. B. Rajakaruna, Kai Wang, Xian-Kai Chen, Xiao-Hong Zhang, Takuji Hatakeyama, Chihaya Adachi

    Nature Communications   15 ( 1 )   4394   2024.5   （ eISSN:2041-1723 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    Manipulating dynamic behaviours of charge carriers and excitons in organic light-emitting diodes (OLEDs) is essential to simultaneously achieve high colour purity and superior operational lifetime. In this work, a comprehensive transient electroluminescence investigation reveals that incorporating a thermally activated delayed fluorescence assistant molecule with a deep lowest unoccupied molecular orbital into a bipolar host matrix effectively traps the injected electrons. Meanwhile, the behaviours of hole injection and transport are still dominantly governed by host molecules. Thus, the recombination zone notably shifts toward the interface between the emissive layer (EML) and the electron-transporting layer (ETL). To mitigate the interfacial carrier accumulation and exciton quenching, this bipolar host matrix could serve as a non-barrier functional spacer between EML/ETL, enabling the distribution of recombination zone away from this interface. Consequently, the optimized OLED exhibits a low driving voltage, promising device stability (95% of the initial luminance of 1000 cd m<sup>−2</sup>, LT<sub>95</sub> &gt; 430 h), and a high Commission Internationale de L’Éclairage y coordinate of 0.69. This indicates that managing the excitons through rational energy level alignment holds the potential for simultaneously satisfying Rec.2020 standard and achieving commercial-level stability.

    DOI： 10.1038/s41467-024-48659-6

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s41467-024-48659-6

  • Delocalized, asynchronous, closed-loop discovery of organic laser emitters Reviewed

    Felix Strieth-Kalthoff, Han Hao, Vandana Rathore, Joshua Derasp, Théophile Gaudin, Nicholas H. Angello, Martin Seifrid, Ekaterina Trushina, Mason Guy, Junliang Liu, Xun Tang, Masashi Mamada, Wesley Wang, Tuul Tsagaantsooj, Cyrille Lavigne, Robert Pollice, Tony C. Wu, Kazuhiro Hotta, Leticia Bodo, Shangyu Li, Mohammad Haddadnia, Agnieszka Wołos, Rafał Roszak, Cher Tian Ser, Carlota Bozal-Ginesta, Riley J. Hickman, Jenya Vestfrid, Andrés Aguilar-Granda, Elena L. Klimareva, Ralph C. Sigerson, Wenduan Hou, Daniel Gahler, Slawomir Lach, Adrian Warzybok, Oleg Borodin, Simon Rohrbach, Benjamin Sanchez-Lengeling, Chihaya Adachi, Bartosz A. Grzybowski, Leroy Cronin, Jason E. Hein, Martin D. Burke, Alán Aspuru-Guzik

    Science   384 ( 6697 )   eadk9227   2024.5   （ ISSN:0036-8075 eISSN:1095-9203 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Contemporary materials discovery requires intricate sequences of synthesis, formulation, and characterization that often span multiple locations with specialized expertise or instrumentation. To accelerate these workflows, we present a cloud-based strategy that enabled delocalized and asynchronous design-make-test-analyze cycles. We showcased this approach through the exploration of molecular gain materials for organic solid-state lasers as a frontier application in molecular optoelectronics. Distributed robotic synthesis and in-line property characterization, orchestrated by a cloud-based artificial intelligence experiment planner, resulted in the discovery of 21 new state-of-the-art materials. Gram-scale synthesis ultimately allowed for the verification of best-in-class stimulated emission in a thin-film device. Demonstrating the asynchronous integration of five laboratories across the globe, this workflow provides a blueprint for delocalizing—and democratizing—scientific discovery.

    DOI： 10.1126/science.adk9227

    Web of Science

    Scopus

    PubMed

    researchmap

  • Realizing a flexible and wavelength-tunable random laser inspired by cicada wings Reviewed

    Chia-Jung Chou, Ayano Abe, Jian-Fu Tang, Tzu-Chau Lin, Chi-Ching Kuo, Ja-Hon Lin, Chihaya Adachi

    Journal of Materials Chemistry C   12 ( 16 )   5701 - 5707   2024.4   （ ISSN:2050-7526 eISSN:2050-7534 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    A bio-tissue-inspired random laser (RL) was successfully demonstrated with a dye-covered silk fibroin replica film (DC-SFRF), created using soft lithography from a cicada's wing. By applying mechanical stress to modify the nanopapillate structure distribution on the film's surface, the DC-SFRF RL exhibits a 13.3 nm blue shift and a decreased speckle contrast.

    DOI： 10.1039/d3tc03576j

    Web of Science

    Scopus

    researchmap

  • Bright, efficient, and stable pure-green hyperfluorescent organic light-emitting diodes by judicious molecular design Reviewed

    Yi-Ting Lee, Chin-Yiu Chan, Nanami Matsuno, Shigetada Uemura, Susumu Oda, Masakazu Kondo, Rangani Wathsala Weerasinghe, Yanmei Hu, Gerardus N. Iswara Lestanto, Youichi Tsuchiya, Yufang Li, Takuji Hatakeyama, Chihaya Adachi

    Nature Communications   15 ( 1 )   3174   2024.4   （ eISSN:2041-1723 ）

    　More details

    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    To fulfill ultra-high-definition display, efficient and bright green organic light-emitting diodes with Commission Internationale de l’Éclairage y-coordinate ≥ 0.7 are required. Although there are some preceding reports of highly efficient devices based on pure-green multi-resonance emitters, the efficiency rolloff and device stabilities for those pure-green devices are still unsatisfactory. Herein, we report the rational design of two pure-green multi-resonance emitters for achieving highly stable and efficient pure-green devices with CIE<sub>x,y</sub>s that are close to the NTSC and BT. 2020 standards. In this study, our thermally activated delayed fluorescence OLEDs based on two pure-green multi-resonance emitters result in CIE<sub>y</sub> up to 0.74. In hyperfluorescent device architecture, the CIE<sub>x</sub>s further meet the x-coordinate requirements, i.e., NTSC (0.21) and BT. 2020 (0.17), while keeping their CIE<sub>y</sub>s ~ 0.7. Most importantly, hyperfluorescent devices display the high maximum external quantum efficiencies of over 25% and maximum luminance of over 10<sup>5</sup> cd m<sup>−2</sup> with suppressed rolloffs (external quantum efficiency of ~20% at 10<sup>4</sup> cd m<sup>−2</sup>) and long device stabilities with LT<sub>95</sub>s of ~ 600 h.

    DOI： 10.1038/s41467-024-47482-3

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s41467-024-47482-3

  • Suppressed Gold Penetration with the Molybdenum Oxide Interlayer to Increase Power Conversion Efficiency of Perovskite Solar Cells Reviewed

    Badamgarav Purev‐Ochir, Jun Tae Song, Pangpang Wang, Masayuki Yahiro, Sunao Yamada, Hajime Nakanotani, Toshinori Matsushima, Chihaya Adachi

    Solar RRL   8 ( 8 )   2024.4   （ ISSN:2367-198X eISSN:2367-198X ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Perovskite solar cells (PSCs) have undergone an unprecedentedly rapid development in both power conversion efficiency (PCE) and operational durability. However, a number of unknown challenges remain before PSC products are ready to launch. Herein, it is demonstrated that the vacuum deposition of gold (Au) onto the organic hole‐transport layer (HTL) results in Au penetration into the perovskite layer. This Au penetration proves to be a limiting factor in PCE due to detrimental carrier recombination caused by the penetrated Au component inside the perovskite light absorber. To mitigate this issue, a thin molybdenum oxide (MoO<sub>x</sub>) interlayer between the organic HTL and the Au electrode is introduced, effectively reducing the Au penetration and suppressing the carrier recombination. Consequently, this MoO<sub>x</sub> introduction increases PCEs from ≈16.9% to ≈19.6% by ≈2.7%. Furthermore, using the MoO<sub>x</sub> interlayer improves the long‐term durability of PSCs. These findings are crucial in elucidating a basic mechanism that limits PCE and in advancing the fabrication of PSC products with even higher performance.

    DOI： 10.1002/solr.202400029

    Web of Science

    Scopus

    researchmap

  • Co-trimerization of benzonitriles with guanidine hydrochloride: synthesis of 2-bromo-4,6-diaryl-1,3,5-triazine derivatives bearing electron-withdrawing groups Reviewed

    Youhei Chitose, Yuika Tamura, Youichi Tsuchiya, Chihaya Adachi

    Chemistry Letters   53 ( 4 )   2024.3   （ ISSN:0366-7022 eISSN:1348-0715 ）

    　More details

    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    In recent decades, various types of aryl-substituted 1,3,5-triazine derivatives have been applied in many research fields, including biomedical chemistry, non-linear optics, and organic electronics. However, the substituent scope for 4,6-diaryl-1,3,5-triazines (DAr-TRZs) remains limited. Here, we present our work on the synthesis of 2-amino- and 2-bromo-DAr-TRZ derivatives bearing electron-withdrawing groups on the aryl rings. Our synthetic methods successfully provided trifluoromethyl-, nitrile-, and nitro-substituted DAr-TRZs. These will expand the structural diversity of conventional triazine-based functional materials.

    DOI： 10.1093/chemle/upae059

    Web of Science

    Scopus

    researchmap

    Other Link： https://academic.oup.com/chemlett/article-pdf/53/4/upae059/57335721/upae059.pdf

  • Understanding of complex spin up-conversion processes in charge-transfer-type organic molecules Reviewed

    Hyung Suk Kim, Sang Hoon Lee, Seunghyup Yoo, Chihaya Adachi

    Nature Communications   15 ( 1 )   2024.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-024-46406-5

  • A donor-acceptor cage for circularly polarized TADF emission

    Chen, LH; Li, CF; Liu, ZF; Kuboi, Y; Fu, EG; Vargas, LS; Adachi, C; Mathevet, F; Zhang, SD

    CHEMICAL COMMUNICATIONS   60 ( 13 )   1758 - 1761   2024.2   （ ISSN:1359-7345 eISSN:1364-548X ）

    　More details

    Language：English   Publisher：Chemical Communications  

    Herein, we report the first example of chiral donor-acceptor cage DA-2 displaying efficient circularly polarized thermally activated delayed fluorescence (CP-TADF) with |glum| values up to 2.1 × 10−3 and PLQY of 32%. A small ΔEST of 0.051 eV and quasi-parallel (θ = 6°) transition electric and magnetic dipole moments were realized from the through-space charge transfer interaction between the parallelly aligned donor and acceptor in DA-2. This D-A cage configuration has provided a novel design strategy for discovering potential efficient CP-TADF emitters.

    DOI： 10.1039/d3cc05136f

    Web of Science

    Scopus

    PubMed

  • Three-dimensional sensing of surfaces by projection of invisible electroluminescence from organic light-emitting diodes Reviewed

    Nishiki Yamada, Hajime Nakanotani, Akitsuna Takagi, Masashi Mamada, Umamahesh Balijapalli, Tatsuya Ichikawa, Eiji Hirata, Shun Kaizu, Akira Tanaka, Kazuichiro Itonaga, Chihaya Adachi

    Science Advances   10 ( 1 )   2024.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.adj6583

  • Advanced Molecular Design for Efficient Multicolor Electrochemiluminescence and Amplified Spontaneous Emission based on Tetra-BF2 Complexes Reviewed

    Luxia Cui, Ami Horioka, Ryoichi Ishimatsu, Masashi Mamada, Chihaya Adachi, Keishiro Tahara, Yu Hoshino, Toshikazu Ono

    Advanced Optical Materials   2024.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202302803

  • Efficient, narrow-band, and stable electroluminescence from organoboron-nitrogen-carbonyl emitter Reviewed

    Ying-Chun Cheng, Xun Tang, Kai Wang, Xin Xiong, Xiao-Chun Fan, Shulin Luo, Rajat Walia, Yue Xie, Tao Zhang, Dandan Zhang, Jia Yu, Xian-Kai Chen, Chihaya Adachi, Xiao-Hong Zhang

    Nature Communications   15 ( 1 )   2024.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-024-44981-1

  • Judicious Design of Pyridine‐Based Hosts for Stable, Efficient, and Low‐Driving Thermally Activated Delayed Fluorescence Organic Light‐Emitting Diodes Reviewed

    Yanmei Hu, Alexander Civil, Yufang Li, Gerardus N. Iswara Lestanto, Youichi Tsuchiya, Chin‐Yiu Chan, Chihaya Adachi

    2024.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Abstract

    Although thermally activated delayed fluorescence (TADF) based organic light‐emitting diodes (OLEDs) continue to achieve high efficiencies, their device stability still does not necessarily meet industrial standards. To improve device stability, careful design of a stable host material is crucial. Herein, with reference to a common p‐type host material, 3,3′‐di(9H‐carbazol‐9‐yl)‐1,1′‐biphenyl (mCBP), three novel host materials based on a pyridine unit, mCBP‐1N, CzPyPhCz, and CzPyBF, are systematically designed to improve the stabilities efficiently. The green and blue TADF OLEDs are fabricated with these three new hosts. The maximum external quantum efficiencies (EQEmaxs) of green OLEDs are 20.3 &#37; and 14.0&#37; for CzPyBF and mCBP hosts, respectively. Further, high EQEs of 19.2&#37; and 12.9&#37; are maintained even at 1000 cd m−2. Most importantly, the device lifetime of the CzPyBF host can achieve LT95 of 62.7 h, which is 2.5 times longer than that of mCBP. Also, lower turn‐on voltages are achieved by using CzPyPhCz in blue and green devices. With host engineering, the TADF OLEDs are simultaneously improved with lower turn‐on voltages, higher EQEs, and longer device lifetimes.

    DOI： 10.1002/adom.202302971

  • Rigorous Determination of Dipole Orientation in Organic Thin Films Using Angle-Dependent Photoluminescence Reviewed

    Yeonghoon Jin, Hyung Suk Kim, Donggyun Lee, Chihaya Adachi, Seunghyup Yoo, Kyoungsik Yu

    The Journal of Physical Chemistry C   128 ( 4 )   1755 - 1761   2024.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.3c06330

  • The role of spontaneous orientation polarization on charge storage behavior at an interface between organic semiconductor layers Reviewed

    Takahiko Yamanaka, Hajime Nakanotani, Chihaya Adachi

    Journal of Materials Chemistry C   12 ( 3 )   1055 - 1060   2023.12   （ ISSN:2050-7526 eISSN:2050-7534 ）

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    Optically generated carriers are pinned at the organic/organic interface if the two organic layers have a large polarization difference, underlining that the combination of polar molecules is crucial to extend the carrier lifetime.

    DOI： 10.1039/d3tc03979j

    Web of Science

    Scopus

    researchmap

  • A Rigid Multiple Resonance Thermally Activated Delayed Fluorescence Core Toward Stable Electroluminescence and Lasing Reviewed

    Angewandte Chemie International Edition   63 ( 2 )   2023.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202315210

  • A polar transition of spontaneous orientation polarization in organic amorphous thin films Reviewed

    Yuuhi Ueda, Masaki Tanaka, Hajime Nakanotani, Chihaya Adachi

    Chemical Physics Letters   833   140915 - 140915   2023.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2023.140915

  • Luminescence mechanism analysis of a TADF molecule showing peculiar thermal behavior Reviewed

    Youichi Tsuchiya, Keito Mizukoshi, Masaki Saigo, Tomohiro Ryu, Kiyoshi Miyata, Ken Onda, Chihaya Adachi

    Faraday Discussions   250   233 - 250   2023.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d3fd00151b

  • Comparison of Exciton Annihilation Processes in Prototypical Charge-Transfer Molecules Reviewed

    Hyung Suk Kim, Sang Hoon Lee, Chihaya Adachi

    The Journal of Physical Chemistry C   128 ( 3 )   994 - 1002   2023.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.3c06465

  • Light blue rigid excited-state intramolecular proton transfer organic semiconductor laser chromophores Reviewed

    Ilene Allison, Mashashi Mamada, Atul Shukla, Sarah K. M. McGregor, Ras Baizureen Roseli, Innes Gale, Vijay P. Rahane, Evan G. Moore, Elizabeth H. Krenske, Nidhi Jain, Chihaya Adachi, Ebinazar B. Namdas, Shih-Chun Lo

    Journal of Materials Chemistry C   11 ( 45 )   15861 - 15872   2023.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d3tc02707d

  • Permeation of oxygen and water into a plasma-enhanced chemical vapor deposited silicon nitride film as function of deposition pressure Reviewed

    Masayuki Shiochi, Hiroshi Fujimoto, Hin Wai Mo, Keiko Inoue, Yusaku Tanahashi, Hiroyuki Hosomi, Takashi Miyamoto, Hiroshi Miyazaki, Chihaya Adachi

    Journal of Vacuum Science &amp; Technology B   41 ( 6 )   2023.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/6.0003050

  • Indication of Intramolecular Triplet–Triplet Annihilation Upconversion in Organic Light‐Emitting Diodes Reviewed

    12 ( 3 )   2023.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Abstract

    It is well known that triplet–triplet annihilation upconversion (TTU) can enhance electroluminescence (EL) efficiency by converting two low‐energy triplet excitons into one high‐energy singlet exciton. However, conventional intermolecular TTU requires high doping concentration to activate, limiting device architecture. Here, six dimer molecules comprised of two anthracene units connected by a spacer unit are investigated, which have a possibility of the intramolecular TTU process. As a result, two dimer molecules show high TTU efficiencies close to the theoretical maximum even in dispersed, diluted conditions. By comparing these molecular conformations, a correlation is found between the dimer structures of two anthracene units and the TTU activity in the diluted condition, i.e., the 3D molecular structure with the exciton utilizing efficiency.

    DOI： 10.1002/adom.202301924

  • Double-locked narrowband hybrid locally-excited and charge-transfer emitter exhibiting amplified spontaneous emission Reviewed

    Long Chen, Xun Tang, Ruihong Liu, Qi Zheng, Youjun Yu, Dongying Zhou, Shengyi Yang, Chihaya Adachi, Liangsheng Liao, Zuoquan Jiang

    The Innovation Materials   1 ( 2 )   100026 - 100026   2023.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.59717/j.xinn-mater.2023.100026

  • Abrupt exciton quenching in blue fluorescent organic light-emitting diodes around turn-on voltage region Reviewed

    Shunta Kakumachi, Thanh Ba Nguyen, Hajime Nakanotani, Chihaya Adachi

    Chemical Engineering Journal   471   144516 - 144516   2023.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cej.2023.144516

  • Anti‐Stokes Luminescence in Multi‐Resonance‐Type Thermally‐Activated Delayed Fluorescence Molecules Reviewed

    62 ( 44 )   2023.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Abstract

    Photon‐upconversion in organic molecular systems is one of the promising technologies for future energy harvesting systems because these systems can generate excitons that possess higher energy than excitation energy. The photon‐upconversion caused by absorbing ambient heat as additional energy is particularly interesting because it could ideally provide a light‐driving cooling system. However, only a few organic molecular systems have been reported. Here, we report the anti‐Stokes photoluminescence (ASPL) derived from hot‐band absorption in a series of multi‐resonance‐type thermally‐activated delayed fluorescence (MR‐TADF) molecules. The MR‐TADF molecules exhibited an anti‐Stokes shift of approximately 0.1 eV with a high PL quantum yield in the solution state. The anti‐Stokes shift corresponded well to the 1–0 vibration transition from the ground state to the excited singlet state, and we further evaluated a correlation between the activation energy for the ASPL intensity and the TADF process. Our demonstration underlines that MR‐TADF molecules have become a novel class of ASPL materials for various future applications, such as light‐driving cooling systems.

    DOI： 10.1002/anie.202312326

  • Investigation of Charge Transport Properties in a 2D Dion–Jacobson Halide Perovskite Based on Terphenyl Dications Reviewed

    Xuelong Liu, Narayanaswamy Kamatham, Zhangsheng Shi, Shidong Yu, Qing Ren, Kentaro Imaoka, Chin-Yiu Chan, Benoît Heinrich, Robin Troiville-Cazilhac, Lise-Marie Chamoreau, Lydia Sosa Vargas, David Kreher, Youichi Tsuchiya, Toshinori Matsushima, Xiankai Chen, Fabrice Mathevet, Chihaya Adachi

    5 ( 8 )   2148 - 2155   2023.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsmaterialslett.3c00509

  • Exciton Dynamics and Optically Pumped Lasing in 1‐Naphthylmethylamine‐Based Quasi‐2D Perovskite Films Reviewed

    Ryotaro Nasu, Xun Tang, Satoru Watanabe, Chathuranganie A. M. Senevirathne, Ganbaatar Tumen‐Ulzii, Toshinori Matsushima, Chihaya Adachi

    33 ( 44 )   2023.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Abstract

    Films of the quasi‐2D perovskite based on 1‐naphthylmethylamine (NMA) are promising as the gain medium for optically pumped lasing and future electrically pumped lasing because of its low lasing threshold and small electroluminescence efficiency rolloff. However, reasons for the low threshold and small efficiency rolloff are still unclear. Therefore, exciton dynamics are investigated in NMA‐based quasi‐2D perovskite films. It is found that quenching of bright excitons by other excitons or charge carriers is unlikely in NMA‐based quasi‐2D perovskite films, which is one reason for the low lasing threshold and small efficiency rolloff. Moreover, thermally stimulated current measurements reveal that the defect levels inside the band gap of the NMA‐based quasi‐2D perovskite are shallow, with a depth of ≈0.3 eV, causing a decrease in nonradiative exciton recombination through the defects. Therefore, population inversion can be easily achieved, leading to the low lasing threshold as well. For fabrication of NMA‐based quasi‐2D perovskite laser devices with even lower lasing thresholds, a circular‐shaped optical resonator, and small‐molecule‐based defect passivation are used. Optically pumped lasing can be obtained from these devices, with a threshold of ≈1 µJ cm−2, which is one of the lowest values ever reported in any perovskite lasers.

    DOI： 10.1002/adfm.202301794

  • Effect of Hydrogen Bonding on Thermally Activated Delayed Fluorescence Behaviors Based on a Study of Hydrate Crystals

    Mamada, M; Katagiri, H; Adachi, C

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   14 ( 22 )   5221 - 5225   2023.6   （ ISSN:1948-7185 ）

    　More details

    Language：English   Publisher：Journal of Physical Chemistry Letters  

    Reverse intersystem crossing (RISC) in purely organic molecules has become an attractive research topic since the demonstration of high efficiencies in organic light-emitting diodes using thermally activated delayed fluorescence (TADF). Although the intermolecular interactions have a significant impact on the exciton dynamics, it is generally difficult to identify the quantitative relationship associated with a specific factor. In this work, we used a clathrate crystal with TADF and H2O molecules to evaluate the effect of hydrogen bonding while maintaining molecular conformations and other intermolecular interactions. The hydrogen bonding shifted the charge transfer excited states to lower energies, resulting in superior TADF properties. Although the increase in the RISC rate is considered to enhance the stabilities of TADF molecules, photostability analysis revealed nearly the same degradation speed despite the 3 times faster RISC rate.

    DOI： 10.1021/acs.jpclett.3c00915

    Web of Science

    Scopus

    PubMed

  • Oxygen‐Induced Reversible Degradation of Perovskite Solar Cells Reviewed

    7 ( 14 )   2023.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    After remarkable progress over the past decades, perovskite solar cells (PSCs) currently exhibit efficient solar power conversion efficiency. However, the environmental instability of perovskite materials and devices is still a serious issue, impeding the future commercialization of this technology. Herein, why PSCs degrade in air is investigated and it is found that one of the critical reasons for the air‐induced PSC degradation is the doping of the 2,2′,7,7′‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,9′‐spirobi‐fluorene (spiro‐OMeTAD) hole‐transport layer with oxygen. Photoelectron yield spectroscopy reveals that the hole‐transport level of the spiro‐OMeTAD layer becomes deeper by oxygen doping, increasing an energy barrier for hole extraction. In other words, decreased hole extraction at the perovskite/spiro‐OMeTAD interface induces the degradation of PSCs in air. However, this oxygen‐induced degradation of PSCs is reversible to some extent by storing PSCs in a vacuum to remove oxygen. In contrast, no detectable degradation of the perovskite light absorber is observed after ≈600 h of air exposure from the results of morphological and structural characterizations. These aspects provide a deeper understanding of PSCs degradation, giving insight into improving long‐term durability in air in the future.

    DOI： 10.1002/solr.202300127

  • Multiple donor–acceptor design for highly luminescent and stable thermally activated delayed fluorescence emitters

    Bhagya Madushani, Masashi Mamada, Kenichi Goushi, Thanh Ba Nguyen, Hajime Nakanotani, Hironori Kaji, Chihaya Adachi

    Scientific Reports   13 ( 1 )   7644   2023.5   （ ISSN:2045-2322 eISSN:2045-2322 ）

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    A considerable variety of donor–acceptor (D–A) combinations offers the potential for realizing highly efficient thermally activated delayed fluorescence (TADF) materials. Multiple D–A type compounds are one of the promising families of TADF materials in terms of stability as well as efficiencies. However, those emitters are always composed of carbazole-based donors despite a wide choice of moieties used in linearly linked single D–A molecules. Herein, we developed a multiple D–A type TADF compound with two distinct donor units of 9,10-dihydro-9,9-dimethylacridine (DMAC) and carbazole as the hetero-donor design. The new emitter exhibits high photoluminescence quantum yield (PLQY) in various conditions including polar media blend and high concentrations. Organic light-emitting diodes (OLEDs) showed a reasonably high external quantum efficiency (EQE). In addition, we revealed that the multiple-D–A type molecules showed better photostability than the single D–A type molecules, while the operational stability in OLEDs involves dominant other factors.

    DOI： 10.1038/s41598-023-34623-9

    Web of Science

    Scopus

    PubMed

    researchmap

    Other Link： https://www.nature.com/articles/s41598-023-34623-9

  • Progress and Perspective toward Continuous‐Wave Organic Solid‐State Lasers

    2023.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202211873

  • Development of a new hole transport material for perovskite solar cells Reviewed

    Ganbaatar Tumen-Ulzii, Kotaro Takekuma, Yuki Fujita, Dai Senba, Chathuranganie A. M. Senevirathne, Yi-Ting Lee, Atsushi Wachi, Hiroshi Sato, Toshinori Matsushima, Chihaya Adachi

    Applied Physics Letters   122 ( 20 )   2023.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0150066

  • Enhancing Triplet–Triplet Upconversion Efficiency and Operational Lifetime in Blue Organic Light-Emitting Diodes by Utilizing Thermally Activated Delayed Fluorescence Materials Reviewed

    15 ( 19 )   23557 - 23563   2023.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.3c02855

  • Highly efficient light harvesting of a Eu(iii) complex in a host–guest film by triplet sensitization Reviewed

    2023.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/D3SC01817B

  • Color tuning of multi-resonant thermally activated delayed fluorescence emitters based on fully fused polycyclic amine/carbonyl frameworks Reviewed

    John Marques dos Santos, Chin-Yiu Chan, Shi Tang, David Hall, Tomas Matulaitis, David B. Cordes, Alexandra M. Z. Slawin, Youichi Tsuchiya, Ludvig Edman, Chihaya Adachi, Yoann Olivier, Eli Zysman-Colman

    Journal of Materials Chemistry C   11 ( 24 )   8263 - 8273   2023.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d3tc00641g

  • Post-Modification of Pyrrolopyrrole Aza-BODIPY toward High Near-Infrared Fluorescence Brightness

    Yitong Wang, Shigeki Mori, Hajime Nakanotani, Chihaya Adachi, Soji Shimizu

    Organic Letters   25 ( 17 )   3040 - 3044   2023.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.orglett.3c00848

  • A Donor–Acceptor Cage for Thermally Activated Delayed Fluorescence: toward a New Kind of TADF Exciplex Emitters

    Lihua Chen, Chuanlong Li, Enguang Fu, Mengyang Li, Yoshiaki Kuboi, Zi-Ying Li, Zhenghong Chen, Jiaolong Chen, Xuelong Liu, Xun Tang, Lucas Frédéric, François Maurel, Chihaya Adachi, Fabrice Mathevet, Shaodong Zhang

    5 ( 5 )   1450 - 1455   2023.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsmaterialslett.3c00310

  • Room-Temperature Continuous-Wave Microcavity Lasers from Solution-Processed Smooth Quasi-2D Perovskite Films with Low Thresholds

    Xiang Gao, Jie Lin, Xiaoyang Guo, Geng He, Deyue Zou, Tomohiro Ishii, Dezhong Zhang, Chenyang Zhao, Hongmei Zhan, Jing Song Huang, Xingyuan Liu, Chihaya Adachi, Chuanjiang Qin, Lixiang Wang

    The Journal of Physical Chemistry Letters   14 ( 10 )   2493 - 2500   2023.3   （ ISSN:1948-7185 eISSN:1948-7185 ）

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acs.jpclett.3c00279

    Web of Science

    Scopus

    PubMed

    researchmap

  • Organic Binary and Ternary Cocrystal Engineering Based on Halogen Bonding Aimed at Room‐Temperature Phosphorescence

    2023.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202211160

  • Artificial p–n‐like Junction Based on Pure 2D Organic–Inorganic Halide Perovskite Structure Having Naphthalene Diimide Acceptor Moieties

    Zhao Feng, Xuelong Liu, Kentaro Imaoka, Tomohiro Ishii, Ganbaatar Tumen‐Ulzii, Xun Tang, George F. Harrington, Benoît Heinrich, Jean‐Charles Ribierre, Lise‐Marie Chamoreau, Lydia Sosa Vargas, David Kreher, Kenichi Goushi, Toshinori Matsushima, Guijiang Zhou, Fabrice Mathevet, Chihaya Adachi

    11 ( 10 )   2023.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202202734

  • Donor Influence on the Optoelectronic Properties of N‐Substituted Tetraphenylimidazole Derivatives

    Tomas Matulaitis, Paloma L. dos Santos, Youichi Tsuchiya, David B. Cordes, Alexandra M. Z. Slawin, Chihaya Adachi, Ifor D. W. Samuel, Eli Zysman‐Colman

    8 ( 9 )   2023.2

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/slct.202300274

  • Classic Fluorophores With a Horizontal Alignment for Enhancing Light Outcoupling Efficiency (≈30&#37;) and External Quantum Efficiency (≈7&#37;) of Near Ultraviolet (λ max  < 400 nm) Organic Light‐Emitting Diodes

    Jian Haur Lee, Jing‐Xiang Huang, Chia‐Hsun Chen, Yi‐Ting Lee, Chin‐Yiu Chan, Yi‐Chung Dzeng, Po‐Wen Tang, Chi Chen, Chihaya Adachi, Tien‐Lung Chiu, Jiun‐Haw Lee, Chin‐Ti Chen

    11 ( 8 )   2023.2

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202202666

  • Ultrapure green organic light-emitting diodes based on highly distorted fused π-conjugated molecular design

    17 ( 3 )   280 - 285   2023.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41566-022-01106-8

  • Electron Lifetime of Over One Month in Disordered Organic Solid‐State Films

    35 ( 11 )   2023.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202210335

  • Twisting of Porphyrin by Assembly in a Metal‐Organic Framework yielding Chiral Photoconducting Films for Circularly‐Polarized‐Light Detection

    Chun Li, Henrik Schopmans, Lukas Langer, Stefan Marschner, Abhinav Chandresh, Jochen Bürck, Youichi Tsuchiya, Adachi Chihaya, Wolfgang Wenzel, Stefan Bräse, Mariana Kozlowska, Lars Heinke

    62 ( 10 )   2023.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202217377

  • Solvent-dependent dual emission processes in charge-transfer excited states of phenothiazine-triphenyltriazine conformers Reviewed

    Tomohiro Ryu, Kiyoshi Miyata, Masaki Saigo, Yuushi Shimoda, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi, Ken Onda

    Chemical Physics Letters   809   140155 - 140155   2022.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2022.140155

  • A Materials Acceleration Platform for Organic Laser Discovery

    Advanced Materials   35 ( 6 )   2207070 - 2207070   2022.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202207070

  • Defect Passivation by Pyridine-Carbazole Molecules for Efficient and Stable Perovskite Solar Cells

    Ganbaatar Tumen-Ulzii, Morgan Auffray, Dino Klotz, George F. Harrington, Xian Kai Chen, Umamahesh Balijapalli, Veeramani Vediyappan, Nozomi Nakamura, Zhao Feng, Kotaro Takekuma, Yuki Fujita, Pangpang Wang, Sunao Yamada, Kaoru Tamada, Munkhbayar Batmunkh, Yu Lin Zhong, Fabrice Mathevet, Hayden Salway, Miguel Anaya, Samuel D. Stranks, Toshinori Matsushima, Chihaya Adachi

    ACS Applied Energy Materials   5 ( 12 )   15819 - 15827   2022.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsaem.2c03364

  • Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material

    Shigetada Uemura, Susumu Oda, Masahiro Hayakawa, Ryosuke Kawasumi, Naoya Ikeda, Yi-Ting Lee, Chin-Yiu Chan, Youichi Tsuchiya, Chihaya Adachi, Takuji Hatakeyama

    Journal of the American Chemical Society   145 ( 3 )   1505 - 1511   2022.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jacs.2c10946

  • Trifluoromethylated thermally activated delayed fluorescence molecule as a versatile photocatalyst for electron-transfer- and energy-transfer-driven reactions

    Tatsuya Morofuji, Takuma Kurokawa, Youhei Chitose, Chihaya Adachi, Naokazu Kano

    Organic &amp; Biomolecular Chemistry   20 ( 48 )   9600 - 9603   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2ob02055f

  • A very low lasing threshold of DABNA derivatives with DFB structures Reviewed

    Masashi Mamada, Satoshi Maedera, Susumu Oda, Thanh Ba Nguyen, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

    Materials Chemistry Frontiers   7 ( 2 )   259 - 266   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2qm01040b

  • Control of emission diffraction angles and laser threshold in mixed-order sampled distributed feedback laser with organic gain media

    H. Park, S. Alasvand Yazdani, F. Bencheikh, R. Komatsu, S. Yokoyama, T. Kamiya, C. Adachi

    Journal of Applied Physics   132 ( 20 )   203101 - 203101   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0123476

  • Correlating Exciton Dynamics of Thermally Activated Delayed-Fluorescence Emitters to Efficiency Roll-Off in OLEDs

    Monirul Hasan, Atul Shukla, Masashi Mamada, Chihaya Adachi, Shih-Chun Lo, Ebinazar B. Namdas

    Physical Review Applied   18 ( 5 )   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/physrevapplied.18.054082

  • Highly Effective Thermally Activated Delayed Fluorescence Emitters Based on Symmetry and Asymmetry Nicotinonitrile Derivatives

    Min Gyeong Choi, Chan Hee Lee, Chihaya Adachi, Sae Youn Lee

    Molecules   27 ( 23 )   8274 - 8274   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/molecules27238274

  • Low-Voltage Driving Copper Iodide-Based Broadband Electroluminescence

    Rui Xu, Dingshuo Zhang, Junjie Si, Yihang Du, Qianqing Hu, Xiaoming Hao, Hong Zhao, Peiqing Cai, Qi Ai, Xin Yao, Yun Gao, Meiyi Zhu, Zenan Zhang, Muzhi Cai, Hin Wai Mo, Kentaro Harada, Zhizhen Ye, Xingliang Dai, Chihaya Adachi, Zugang Liu

    ACS Energy Letters   7 ( 12 )   4408 - 4416   2022.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsenergylett.2c02471

  • Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

    Shintaro Kohata, Hajime Nakanotani, Chihaya Adachi

    Chemistry Letters   51 ( 10 )   989 - 992   2022.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.220304

  • Unexpected role of hole and electron blocking interlayers controlling charge carrier injection and transport in TADF based blue organic light-emitting diodes

    Masashi Mamada, Chihaya Adachi

    Applied Physics Letters   121 ( 13 )   131103 - 131103   2022.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0100373

  • A convenient method to estimate the glass transition temperature of small organic semiconductor materials

    Youichi Tsuchiya, Nozomi Nakamura, Shunta Kakumachi, Keiko Kusuhara, Chin-Yiu Chan, Chihaya Adachi

    Chemical Communications   58 ( 80 )   11292 - 11295   2022.9   （ ISSN:1359-7345 eISSN:1364-548X ）

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    The convenient melt-blending method for DSC measurement provides the reliable glass transition temperature (T<sub>g</sub>) of the materials which are hard to measure by the standard DSC measurement, e.g., organic semiconductors.

    DOI： 10.1039/d2cc01467j

    Web of Science

    Scopus

    PubMed

    researchmap

  • An Overlooked Charge‐Transfer Interaction in the Interfacial Triplet–Triplet Upconversion Process in Blue Organic Light‐Emitting Diodes Reviewed

    10 ( 18 )   2200704 - 2200704   2022.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202200704

  • Multiple resonance type thermally activated delayed fluorescence by dibenzo [1,4] azaborine derivatives

    Jaehyun Bae, Mika Sakai, Youichi Tsuchiya, Naoki Ando, Xian-Kai Chen, Thanh Ba Nguyen, Chin-Yiu Chan, Yi-Ting Lee, Morgan Auffray, Hajime Nakanotani, Shigehiro Yamaguchi, Chihaya Adachi

    Frontiers in Chemistry   10   2022.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fchem.2022.990918

  • Tailor‐Made Multi‐Resonance Terminal Emitters toward Narrowband, High‐Efficiency, and Stable Hyperfluorescence Organic Light‐Emitting Diodes Reviewed

    Yi‐Ting Lee, Chin‐Yiu Chan, Masaki Tanaka, Masashi Mamada, Kenichi Goushi, Xun Tang, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

    10 ( 17 )   2200682 - 2200682   2022.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202200682

  • Highly Efficient Deep‐Blue Organic Light‐Emitting Diodes Based on Rational Molecular Design and Device Engineering Reviewed

    Masashi Mamada, Hiroshi Katagiri, Chin‐Yiu Chan, Yi‐Ting Lee, Kenichi Goushi, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

    32 ( 32 )   2204352 - 2204352   2022.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.202204352

  • Efficient and Bright Blue Thermally Activated Delayed Fluorescence from Light‐Emitting Electrochemical Cells

    Shi Tang, Petter Lundberg, Youichi Tsuchiya, Joan Ràfols‐Ribé, Yongfeng Liu, Jia Wang, Chihaya Adachi, Ludvig Edman

    32 ( 44 )   2205967 - 2205967   2022.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.202205967

  • Two boron atoms versus one: high-performance deep-blue multi-resonance thermally activated delayed fluorescence emitters

    Chin-Yiu Chan, Subeesh Madayanad Suresh, Yi-Ting Lee, Youichi Tsuchiya, Tomas Matulaitis, David Hall, Alexandra M. Z. Slawin, Stuart Warriner, David Beljonne, Yoann Olivier, Chihaya Adachi, Eli Zysman-Colman

    Chemical Communications   58 ( 67 )   9377 - 9380   2022.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2cc03347j

  • Balanced electron and hole injection and transport in OLEDs by using transparent electrodes

    Sahar Alasvand Yazdani, Fatima Bencheikh, Ryutaro Komatsu, Amir Mikaeili, Chihaya Adachi

    Japanese Journal of Applied Physics   61 ( 8 )   088002 - 088002   2022.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/ac7e96

  • Carbazole-2-carbonitrile as an acceptor in deep-blue thermally activated delayed fluorescence emitters for narrowing charge-transfer emissions Reviewed

    Chin-Yiu Chan, Yi-Ting Lee, Masashi Mamada, Kenichi Goushi, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

    CHEMICAL SCIENCE   13 ( 26 )   7821 - 7828   2022.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2sc02478k

  • Impact of excitonic and photonic loss mechanisms on the threshold and slope efficiency of organic semiconductor lasers

    Sahar Alasvand Yazdani, Amir Mikaeili, Fatima Bencheikh, Chihaya Adachi

    Japanese Journal of Applied Physics   61 ( 7 )   074003 - 074003   2022.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/ac759d

  • Mechanistic dichotomy in the solvent dependent access to E vs. Z-allylic amines via decarboxylative vinylation of amino acids

    Samir Manna, Shunta Kakumachi, Kanak Kanti Das, Youichi Tsuchiya, Chihaya Adachi, Santanu Panda

    Chemical Science   13 ( 33 )   9678 - 9684   2022.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d2sc02090d

  • Spontaneous formation of metastable orientation with well-organized permanent dipole moment in organic glassy films Reviewed

    Masaki Tanaka, Morgan Auffray, Hajime Nakanotani, Chihaya Adachi

    Nature Materials   21 ( 7 )   819 - 825   2022.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41563-022-01265-7

  • A Thermally Activated Delayed Fluorescence Green OLED with 4500 h Lifetime and 20&#37; External Quantum Efficiency by Optimizing the Emission Zone using a Single‐Emission Spectrum Technique

    Rossa Mac Ciarnáin, Hin Wai Mo, Kaori Nagayoshi, Hiroshi Fujimoto, Kentaro Harada, Robert Gehlhaar, Tung Huei Ke, Paul Heremans, Chihaya Adachi

    34 ( 29 )   2201409 - 2201409   2022.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202201409

  • Thermally activated delayed fluorescence poly(dendrimer)s – detrapping excitons for reverse intersystem crossing

    10 ( 20 )   8109 - 8124   2022.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    We compare the effect of donor strength on the optoelectronic properties of thermally activated delayed fluorescence poly(dendrimer)s and their dendrimer analogues.

    DOI： 10.1039/d1tc05151b

  • Efficient Perovskite Light-Emitting Diodes with a Siloxane-Blended Organic Hole Transport Layer Reviewed

    Toshinori Matsushima, Ryotaro Nasu, Kotaro Takekuma, Tomohiro Ishii, Zhao Feng, Xun Tang, Nozomi Nakamura, Ganbaatar Tumen-Ulzii, Chihaya Adachi

    Advanced Photonics Research   2200003   2022.5

    　More details

    Language：English  

    DOI： 10.1002/adpr.202200003

  • Synthesis, crystal structure, tropicity and charge transport properties of diindenothienothiophene derivatives Reviewed

    Journal of Materials Chemistry C   10   7717 - 7723   2022.4

    　More details

    Language：English  

    DOI： 10.1039/D2TC01324J

  • Significant role of triplet spin state for exciton dissociation in organic solids Reviewed

    Takahiko Yamanaka, Hajime Nakanotani, Chihaya Adachi

    Science Advances   8 ( 9 )   2022.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.abj9188

  • Cibalackrot Dendrimers for Hyperfluorescent Organic Light-Emitting Diodes Reviewed

    Nicholle R. Wallwork, Masashi Mamada, Angus B. Keto, Sarah K. M. McGregor, Atul Shukla, Chihaya Adachi, Elizabeth Krenske, Ebinazar B. Namdas, Shih-Chun Lo

    Macromolecular Rapid Communications   2200118   2022.3

    　More details

    Language：English  

    DOI： 10.1002/marc.202200118

  • Low Light Amplification Threshold and Reduced Efficiency Roll-Off in Thick Emissive Layer OLEDs from a Diketopyrrolopyrrole Derivative Reviewed

    Atul Shukla, Volter Entoma, Sarah K. M. McGregor, Monirul Hasan, Masashi Mamada, Evan G. Moore, Chihaya Adachi, Shih-Chun Lo, Ebinazar B. Namdas

    Macromolecular Rapid Communications   2200115   2022.3

    　More details

    Language：English  

    DOI： 10.1002/marc.202200115

  • Numerical Study of Triplet Dynamics in Organic Semiconductors Aimed for the Active Utilization of Triplets by TADF under Continuous-Wave Lasing Reviewed

    Ayano Abe, Kenichi Goushi, Atula S.D. Sandanayaka, Ryutaro Komatsu, Takashi Fujihara, Masashi Mamada, Chihaya Adachi

    Journal of Physical Chemistry Letters   13 ( 5 )   1323 - 1329   2022.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.1c03983

  • Achieving a Carbon Neutral Future through Advanced Functional Materials and Technologies

    Andrew Chapman, Elif Ertekin, Masanobu Kubota, Akihide Nagao, Kaila Bertsch, Arnaud Macadre, Toshihiro Tsuchiyama, Takuro Masamura, Setsuo Takaki, Ryosuke Komoda, Mohsen Dadfarnia, Brian Somerday, Alexander Tsekov Staykov, Joichi Sugimura, Yoshinori Sawae, Takehiro Morita, Hiroyoshi Tanaka, Kazuyuki Yagi, Vlad Niste, Prabakaran Saravanan, Shugo Onitsuka, Ki-Seok Yoon, Seiji Ogo, Toshinori Matsushima, Ganbaatar Tumen-Ulzii, Dino Klotz, Dinh Hoa Nguyen, George Harrington, Chihaya Adachi, Hiroshige Matsumoto, Leonard Kwati, Yukina Takahashi, Nuttavut Kosem, Tatsumi Ishihara, Miho Yamauchi, Bidyut Baran Saha, Md. Amirul Islam, Jin Miyawaki, Harish Sivasankaran, Masamichi Kohno, Shigenori Fujikawa, Roman Selyanchyn, Takeshi Tsuji, Yukihiro Higashi, Reiner Kirchheim, Petros Sofronis

    Bulletin of the Chemical Society of Japan   95 ( 1 )   73 - 103   2022.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.20210323

  • Performance Analysis of a Perovskite-Based Thing-to-Thing Optical Wireless Power Transfer System Reviewed

    Dinh Hoa Nguyen, Ganbaatar Tumen-Ulzii, Toshinori Matsushima, Chihaya Adachi

    IEEE Photonics Journal   14 ( 1 )   2022.1

    　More details

    Language：English  

    DOI： 10.1109/JPHOT.2022.3146365

  • Probing polaron-induced exciton quenching in TADF based organic light-emitting diodes Reviewed

    Monirul Hasan, Siddhartha Saggar, Atul Shukla, Fatima Bencheikh, Jan Sobus, Sarah K. M. McGregor, Chihaya Adachi, Shih-Chun Lo, Ebinazar B. Namdas

    nature communications   13   254   2022.1

    　More details

    Language：English  

    DOI： 10.1038/s41467-021-27739-x

  • Steric Modulation of Spiro Structure for Highly Efficient Multiple Resonance Emitters Reviewed

    Yang-Kun Qu, Dong-Ying Zhou, Fan-Cheng Kong, Qi Zheng, Xun Tang, Yuan-Hao Zhu, Chen-Chao Huang, Zi-Qi Feng, Jian Fan, Chihaya Adachi, Liang-Sheng Liao, Zuo-Quan Jiang

    Angewandte Chemie   61 ( 22 )   e202201886   2022.1

    　More details

    Language：English  

    DOI： 10.1002/anie.202201886

  • Improved Performance of Perovskite Solar Cells by Suppressing the Energy-Level Shift of the PEDOT:PSS Hole Transport Layer Reviewed

    Masayuki Yahiro, Shun Sugawara, Shinichi Maeda, Yuko Shimoi, Pangpang Wang, Shin-ichiro Kobayashi, Kotaro Takekuma, Ganbaatar Tumen-Ulzii, Chuanjiang Qin, Toshinori Matsushima, Tadayuki Isaji, Yoshinori Kasai, Takashi Fujihara, Chihaya Adachi

    ACS Applied Energy Materials   4 ( 12 )   14590 - 14598   2021.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsaem.1c03213

  • Advanced Organic Laser System Having Triplet Scavengers Reviewed

    Buddhika S.B, KARUNATHILAKA, Umamahesh BALIJAPALLI, Toshinori MATSUSHIMA, Atula S.D. SANDANAYAKA, Chihaya ADACHI

    J-STAGE   60 ( 6 )   615 - 630   2021.12

    　More details

    Language：English  

    DOI： 10.11370/isj.60.615

  • High-performance solution-processed red hyperfluorescent OLEDs based on cibalackrot Reviewed

    Nicholle R. Wallwork, Masashi Mamada, Atul Shukla, Sarah K. M. McGregor, Chihaya Adachi, Ebinazar Namdas, Shih-Chun Lo

    Journal of Materials Chemistry C   10   4767 - 4774   2021.12

    　More details

    Language：English  

    DOI： 10.1039/D1TC04937B

  • Organic photostimulated luminescence associated with persistent spin-correlated radical pairs Reviewed

    Manabu Sakurai, Ryota Kabe, Masaaki Fuki, Zesen Lin, Kazuya Jinnai, Yasuhiro Kobori, Chihaya Adachi, Takashi Tachikawa

    Communications Materials   2 ( 1 )   2021.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s43246-021-00178-3

  • Hot exciplexes in U-shaped TADF molecules with emission from locally excited states Reviewed

    A. Lennart Schleper, Kenichi Goushi, Christoph Bannwarth, Bastian Haehnle, Philipp J. Welscher, Chihaya Adachi, Alexander J. C. Kuehne

    Nature Communications   12 ( 1 )   2021.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-021-26439-w

  • Synthesis, Aromaticity, and Application of peri-Pentacenopentacene: Localized Representation of Benzenoid Aromatic Compounds Reviewed

    61 ( 1 )   e202112794   2021.11

    　More details

    Language：English  

    DOI： 10.1002/anie.202112794

  • 2,6-Dicarbonitrile Diphenyl-1 lambda(5)-Phosphinine (DCNP)-A Robust Conjugated Building Block for Multi-Functional Dyes Exhibiting Tunable Amplified Spontaneous Emission Reviewed

    Umamahesh Balijapalli, Xun Tang, Daichi Okada, Yi-Ting Lee, Buddhika S. B. Karunathilaka, Morgan Auffray, Ganbaatar Tumen-Ulzii, Youichi Tsuchiya, Atula S. D. Sandanayaka, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   9 ( 21 )   2021.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202101122

  • Efficiency of Thermally Activated Delayed Fluorescence Sensitized Triplet Upconversion Doubled in Three-Component System Reviewed

    Brett Yurash, Alana Dixon, Carolina Espinoza, Alexander Mikhailovsky, Sangmin Chae, Hajime Nakanotani, Chihaya Adachi, Thuc-Quyen Nguyen

    Advanced Materials   34 ( 5 )   2103976   2021.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202103976

  • Low-Threshold Exciton-Polariton Condensation via Fast Polariton Relaxation in Organic Microcavities Reviewed

    Advanced Optical Materials   10 ( 3 )   2102034   2021.11

    　More details

    Language：English  

    DOI： 10.1002/adom.202102034

  • Managing Intersegmental Charge-Transfer and Multiple Resonance Alignments of D3-A Typed TADF Emitters for Red OLEDs with Improved Efficiency and Color Purity Reviewed

    Xiao-Chun Fan, Kai Wang, Yi-Zhong Shi, Jia-Xiong Chen, Feng Huang, Hui Wang, Ya-Nan Hu, Youichi Tsuchiya, Xue-Mei Ou, Jia Yu, Chihaya Adachi, Xiao-Hong Zhang

    Advanced Optical Materials   10 ( 3 )   2101789   2021.11

    　More details

    Language：English  

    DOI： 10.1002/adom.202101789

  • Organic long-persistent luminescence stimulated by visible light in p-type systems based on organic photoredox catalyst dopants. Reviewed International journal

    Kazuya Jinnai, Ryota Kabe, Zesen Lin, Chihaya Adachi

    Nature materials   21   338 - 344   2021.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41563-021-01150-9

  • Recycling of Triplets into Singlets for High-Performance Organic Lasers Reviewed

    Chathuranganie A. M. Senevirathne, Seiya Yoshida, Morgan Auffray, Masayuki Yahiro, Buddhika S. B. Karunathilaka, Fatima Bencheikh, Kenichi Goushi, Atula S. D. Sandanayaka, Toshinori Matsushima, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   2021.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202101302

  • Exact Solution of Kinetic Analysis for Thermally Activated Delayed Fluorescence Materials Reviewed

    Youichi Tsuchiya, Stefan Diesing, Fatima Bencheikh, Yoshimasa Wada, Paloma L. dos Santos, Hironori Kaji, Eli Zysman-Colman, Ifor D. W. Samuel, Chihaya Adachi

    The Journal of Physical Chemistry A   125 ( 36 )   8074 - 8089   2021.9

    　More details

    Language：Others  

    DOI： 10.1021/acs.jpca.1c04056

  • Characterizing the Conformational Distribution in an Amorphous Film of an Organic Emitter and Its Application in a “Self-Doping” Organic Light-Emitting Diode Reviewed

    60 ( 49 )   25878 - 25883   2021.9

    　More details

    Language：English  

    DOI： 10.1002/anie.202108943

  • Enhanced Light–Matter Interaction and Polariton Relaxation by the Control of Molecular Orientation Reviewed

    Tomohiro Ishii, Fatima Bencheikh, Sébastien Forget, Sébastien Chénais, Benoît Heinrich, David Kreher, Lydia Sosa Vargas, Kiyoshi Miyata, Ken Onda, Takashi Fujihara, Stéphane Kéna‐Cohen, Fabrice Mathevet, Chihaya Adachi

    2101048 - 2101048   2021.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202101048

  • Electron‐Affinity Substituent in 2,6‐Dicarbonitrile Diphenyl‐1λ 5 ‐Phosphinine (DCNP) Towards High‐Quality Organic Lasing and Electroluminescence under High Current Injection

    Xun Tang, Umamahesh Balijapalli, Daichi Okada, Buddhika S. B. Karunathilaka, Chathuranganie A. M. Senevirathne, Yi‐Ting Lee, Zhao Feng, Atula S. D. Sandanayaka, Toshinori Matsushima, Chihaya Adachi

    2104529 - 2104529   2021.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.202104529

  • Visualization of Frontier Molecular Orbital Separation of a Single Thermally Activated Delayed Fluorescence Emitter by STM

    Inhae Zoh, Miyabi Imai-Imada, Jaehyun Bae, Hiroshi Imada, Youichi Tsuchiya, Chihaya Adachi, Yousoo Kim

    The Journal of Physical Chemistry Letters   12 ( 31 )   7512 - 7518   2021.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.1c02140

  • An Element‐Substituted Cyclobutadiene Exhibiting High‐Energy Blue Phosphorescence

    2021.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ange.202108413

  • Advanced Molecular Design for Organic Light Emitting Diode Emitters Based on Horizontal Molecular Orientation and Thermally Activated Delayed Fluorescence

    Organic Semiconductors for Optoelectronics   295 - 305   2021.7

    　More details

    Language：Others  

    DOI： 10.1002/9781119146131.ch12

  • Developing Efficient Dinuclear Pt(II) Complexes Based on the Triphenylamine Core for High-Efficiency Solution-Processed OLEDs Reviewed

    Yuanhui Sun, Bochen Liu, Yue Guo, Xi Chen, Yi-Ting Lee, Zhao Feng, Chihaya Adachi, Guijiang Zhou, Zhao Chen, Xiaolong Yang

    ACS Appl. Mater. Interfaces   13 ( 30 )   36020 - 36032   2021.7

    　More details

    Language：English  

    DOI： 10.1021/acsami.1c06148

  • Tetrabenzo[a,c]phenazine Backbone for Highly Efficient Orange–Red Thermally Activated Delayed Fluorescence with Completely Horizontal Molecular Orientation Reviewed

    60 ( 35 )   19364 - 19373   2021.6

    　More details

    Language：Others  

    DOI： 10.1002/anie.202106570

  • Active Control of Spontaneous Orientation Polarization of Tris(8‐hydroxyquinolinato)aluminum (Alq 3 ) Films and Its Effect on Performance of Organic Light‐Emitting Diodes

    2100486 - 2100486   2021.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/aelm.202100486

  • An Element‐Substituted Cyclobutadiene Exhibiting High‐Energy Blue Phosphorescence

    60 ( 40 )   21817 - 21823   2021.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202106490

  • Toward Thing-to-Thing Optical Wireless Power Transfer: Metal Halide Perovskite Transceiver as an Enabler

    Dinh Hoa Nguyen, Toshinori Matsushima, Chuanjiang Qin, Chihaya Adachi

    Frontiers in Energy Research   9   2021.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fenrg.2021.679125

  • Unintentional passivation of 4-tertbutyl pyridine for improved efficiency and decreased operational stability of perovskite solar cells

    Ganbaatar Tumen-Ulzii, Morgan Auffray, Toshinori Matsushima, Chihaya Adachi

    Applied Physics Letters   118 ( 24 )   241603 - 241603   2021.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0051527

  • Direct Observation of Photoexcited Electron Dynamics in Organic Solids Exhibiting Thermally Activated Delayed Fluorescence via Time-Resolved Photoelectron Emission Microscopy Reviewed

    Yusuke Fukami, Masato Iwasawa, Masahiro Sasaki, Takuya Hosokai, Hajime Nakanotani, Chihaya Adachi, Keiki Fukumoto, Yoichi Yamada

    Advanced Optical Materials   9 ( 19 )   2100619   2021.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202100619

  • Long-Persistent Luminescence from an Exciplex-Based Organic Light-Emitting Diode Reviewed

    Shinichi Tan, Kazuya Jinnai, Ryota Kabe, Chihaya Adachi

    ADVANCED MATERIALS   33 ( 23 )   2021.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202008844

  • Thermally activated processes in an organic long-persistent luminescence system Reviewed

    Kazuya Jinnai, Naohiro Nishimura, Chihaya Adachi, Ryota Kabe

    NANOSCALE   13 ( 18 )   8412 - 8417   2021.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0nr09227d

  • Highly Efficient Near‐Infrared Electrofluorescence from a Thermally Activated Delayed Fluorescence Molecule

    Umamahesh Balijapalli, Ryo Nagata, Nishiki Yamada, Hajime Nakanotani, Masaki Tanaka, Anthony D'Aléo, Virginie Placide, Masashi Mamada, Youichi Tsuchiya, Chihaya Adachi

    133 ( 15 )   8558 - 8563   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ange.202016089

  • Heptacene: Synthesis and Its Hole-Transfer Property in Stable Thin Films

    Takaaki Miyazaki, Motonori Watanabe, Toshinori Matsushima, Ching-Ting Chien, Chihaya Adachi, Shih-Sheng Sun, Hiroyuki Furuta, Tahsin J. Chow

    2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/chem.202100936

  • Amplified spontaneous emission from oligo(p-phenylenevinylene) derivatives Reviewed

    Masashi Mamada, Hajime Nakanotani, Chihaya Adachi

    Materials Advances   2   3906 - 3914   2021.4

    　More details

    Language：Others  

    DOI： 10.1039/D0MA00756K

  • Synthesis and Characterization of 5,5′-Bitetracene Reviewed

    50 ( 4 )   800 - 803   2021.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    A tetracene dimer, 5,5'-bitetracene (55BT), has successfully been synthesized for the first time and its structure was confirmed by X-ray single crystal analysis. The electrochemical and optical properties of 55BT were investigated and compared to those of tetracene. Although the photoluminescence quantum yield of 55BT was slightly higher than that of tetracene, the results of the transient absorption spectroscopy suggested triplet formation by singlet fission in solution.

    DOI： 10.1246/cl.200909

  • Highly Efficient Near‐Infrared Electrofluorescence from a Thermally Activated Delayed Fluorescence Molecule Reviewed

    Umamahesh Balijapalli, Ryo Nagata, Nishiki Yamada, Hajime Nakanotani, Masaki Tanaka, Anthony D'Aléo, Virginie Placide, Masashi Mamada, Youichi Tsuchiya, Chihaya Adachi

    60 ( 15 )   8477 - 8482   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202016089

  • Intramolecular‐Locked High Efficiency Ultrapure Violet‐Blue (CIE‐y <0.046) Thermally Activated Delayed Fluorescence Emitters Exhibiting Amplified Spontaneous Emission Reviewed

    Aziz Khan, Xun Tang, Cheng Zhong, Qiang Wang, Sheng‐Yi Yang, Fan‐Cheng Kong, Shuai Yuan, Atula S. D. Sandanayaka, Chihaya Adachi, Zuo‐Quan Jiang, Liang‐Sheng Liao

    31 ( 15 )   2009488 - 2009488   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.202009488

  • Investigating HOMO Energy Levels of Terminal Emitters for Realizing High‐Brightness and Stable TADF‐Assisted Fluorescence Organic Light‐Emitting Diodes Reviewed

    Yi‐Ting Lee, Chin‐Yiu Chan, Masaki Tanaka, Masashi Mamada, Umamahesh Balijapalli, Youichi Tsuchiya, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

    7 ( 4 )   2001090 - 2001090   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/aelm.202001090

  • Isotope Effect of Host Material on Device Stability of Thermally Activated Delayed Fluorescence Organic Light‐Emitting Diodes Reviewed

    1 ( 4 )   2000057 - 2000057   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/smsc.202000057

  • Photoactive Organic/Inorganic Hybrid Materials with Nanosegregated Donor–Acceptor Arrays Reviewed

    Xiaolei Zhu, Cheriehan Hessin, Aude Salamé, Lydia Sosa‐Vargas, David Kreher, Chihaya Adachi, Anna Proust, Pierre Mialane, Jérome Marrot, Aude Bouchet, Michel Sliwa, Stéphane Méry, Benoît Heinrich, Fabrice Mathevet, Guillaume Izzet

    60 ( 15 )   8419 - 8424   2021.4

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202014319

  • Energy transfer in (PEA)2FAn−1PbnBr3n+1 quasi-2D perovskites

    Džiugas Litvinas, Ramūnas Aleksiejūnas, Patrik Ščajev, Paulius Baronas, Vaiva Soriūtė, Chuanjiang Qin, Takashi Fujihara, Toshinori Matsushima, Chihaya Adachi, Saulius Juršėnas

    9 ( 14 )   4782 - 4791   2021.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    <p>Simultaneous fast energy funnelling between the neighbouring sheets and slower carrier and exciton in-plane diffusion revealed in quasi-2D perovskites.</p>

    DOI： 10.1039/d1tc00422k

  • Thermally Activated Delayed Fluorescence Properties of Trioxoazatriangulene Derivatives Modified with Electron Donating Groups Reviewed

    Advanced Optical Materials   9 ( 14 )   2002174 - 2002174   2021.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202002174

  • An Electron‐Accepting aza‐BODIPY‐Based Donor–Acceptor–Donor Architecture for Bright NIR Emission Reviewed

    Chemistry – A European Journal   27 ( 16 )   5259 - 5267   2021.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    A bright near-infrared (NIR) fluorescent molecule was developed based on the donor–acceptor–donor (D–A–D) approach using an aza-BODIPY analog called pyrrolopyrrole aza-BODIPY (PPAB) as an electron-accepting chromophore. Directly introducing electron-donating triphenylamine (TPA) to develop a D–A–D structure caused redshifts of absorption and emission of PPAB into the NIR region with an enhanced fluorescence brightness of up to 5.2×104 m−1 cm−1, whereas inserting a phenylene linker between the TPA donor and the PPAB acceptor induced solvatochromic behavior in emission. Transient absorption spectra and theoretical calculations revealed the presence of a highly emissive hybridized locally excited and charge-transfer state in the former case and the contribution of the dark charge-separated state to the excited state in the latter case. The bright D–A–D PPAB as a novel emitter resulted in a NIR electroluminescence with a high external quantum efficiency of 3.7 &#37; and a low amplified spontaneous emission threshold of ca. 80 μJ cm−2, indicating the high potential for NIR optoelectronic applications.

    DOI： 10.1002/chem.202005360

  • Markedly Improved Performance of Optically Pumped Organic Lasers with Two-Dimensional Distributed-Feedback Gratings Reviewed

    Chathuranganie A. M. Senevirathne, Atula S. D. Sandanayaka, Buddhika S. B. Karunathilaka, Takashi Fujihara, Fatima Bencheikh, Chuanjiang Qin, Kenichi Goushi, Toshinori Matsushima, Chihaya Adachi

    ACS Photonics   8 ( 5 )   1324 - 1334   2021.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsphotonics.0c01728

  • Planar and Rigid Pyrazine‐Based TADF Emitter for Deep Blue Bright Organic Light‐Emitting Diodes Reviewed

    Pachaiyappan Rajamalli, Dongyang Chen, Subeesh Madayanad Suresh, Youichi Tsuchiya, Chihaya Adachi, Eli Zysman‐Colman

    2021.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ejoc.202100086

  • Realizing Near‐Infrared Laser Dyes through a Shift in Excited‐State Absorption Reviewed

    Reiko Aoki, Ryutaro Komatsu, Kenichi Goushi, Masashi Mamada, Soo Young Ko, Jeong Weon Wu, Virginie Placide, Anthony D'Aléo, Chihaya Adachi

    9 ( 6 )   2001947 - 2001947   2021.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    The development of near-infrared (NIR) light sources has attracted much interest due to their attractive applications, such as biosensing and light detection and ranging (LiDAR). In particular, organic semiconductor laser diodes with NIR emission are emerging as a next generation technology. However, organic NIR emitters have generally suffered from a low quantum yield, which has resulted in only a few examples of organic solid-state NIR lasers. In this study, the authors demonstrate a highly efficient NIR emitter based on a boron difluoride curcuminoid structure, which shows a high photoluminescence (PL) quantum yield (phi(PL)) at >700 nm and a high fluorescence radiative rate constant in a solid-state film. Amplified spontaneous emission and lasing occurs at >800 nm with very low thresholds. The large redshift of the stimulated emission is attributed to the transition from the lowest excited state to the different vibrational levels of the ground state owing to the overlap between the emission and the singlet-singlet excited-state absorption.

    DOI： 10.1002/adom.202001947

  • Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission Reviewed

    Chin-Yiu Chan, Masaki Tanaka, Yi-Ting Lee, Yiu-Wing Wong, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

    Nature Photonics   15 ( 3 )   203 - 207   2021.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41566-020-00745-z

  • Advantages of naphthalene as a building block for organic solid state laser dyes: smaller energy gaps and enhanced stability

    Yuya Oyama, Masashi Mamada, Akihiro Kondo, Chihaya Adachi

    Journal of Materials Chemistry C   9 ( 12 )   4112 - 4118   2021.2

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0tc05387b

  • Deep Blue Fluorescent Material with an Extremely High Ratio of Horizontal Orientation to Enhance Light Outcoupling Efficiency (44&#37;) and External Quantum Efficiency in Doped and Non-Doped Organic Light-Emitting Diodes Reviewed

    Jian Haur Lee, Hung-Yi Lin, Chia-Hsun Chen, Yi-Ting Lee, Tien-Lung Chiu, Jiun-Haw Lee, Chin-Ti Chen, Chihaya Adachi

    ACS Appl. Mater. Interfaces   13 ( 29 )   34605 - 34615   2021.1

    　More details

    Language：English  

    DOI： 10.1021/acsami.1c07859

  • Synthesis, crystal structure and charge transport characteristics of stable peri-tetracene analogues

    Masashi Mamada, Ryota Nakamura, Chihaya Adachi

    Chemical Science   12 ( 2 )   552 - 558   2021.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0sc04699j

  • Thermally-activated delayed fluorescence for light-emitting devices Reviewed

    Hajime Nakanotani, Youichi Tsuchiya, Chihaya Adachi

    Chemistry Letters   2021.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.200915

  • Suppression of external quantum efficiency rolloff in organic light emitting diodes by scavenging triplet excitons Reviewed

    Buddhika S. B. Karunathilaka, Umamahesh Balijapalli, Chathuranganie A. M. Senevirathne, Seiya Yoshida, Yu Esaki, Kenichi Goushi, Toshinori Matsushima, Atula S. D. Sandanayaka, Chihaya Adachi

    Nature Communications   11 ( 1 )   2020.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-020-18292-0

  • Influence of energy gap between charge-transfer and locally excited states on organic long persistence luminescence Reviewed

    Zesen Lin, Ryota Kabe, Kai Wang, Chihaya Adachi

    Nature Communications   2020.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-019-14035-y

  • Color-Tunable Low-Threshold Amplified Spontaneous Emission from Yellow to Near-Infrared (NIR) Based on Donor–Spacer–Acceptor–Spacer–Donor Linear Dyes Reviewed

    Xun Tang, Yi-Ting Lee, Zhao Feng, Soo Young Ko, Jeong Weon Wu, Virginie Placide, Jean-Charles Ribierre, Anthony D’Aléo, Chihaya Adachi

    2 ( 12 )   1567 - 1574   2020.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsmaterialslett.0c00421

  • Origin and Suppression of External Quantum Efficiency Roll-Off in Quasi-Two-Dimensional Metal Halide Perovskite Light-Emitting Diodes Reviewed

    Satoru Watanabe, Ganbaatar Tumen-Ulzii, Tai Cheng, Toshinori Matsushima, Chihaya Adachi

    The Journal of Physical Chemistry C   124 ( 50 )   27422 - 27428   2020.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.0c09241

  • Solid cyclooctatetraene-based triplet quencher demonstrating excellent suppression of singlet–triplet annihilation in optical and electrical excitation Reviewed

    11 ( 1 )   2020.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    <title>Abstract</title>
    Triplet excitons have been identified as the major obstacle to the realisation of organic laser diodes, as accumulation of triplet excitons leads to significant losses under continuous wave (CW) operation and/or electrical excitation. Here, we report the design and synthesis of a solid-state organic triplet quencher, as well as in-depth studies of its dispersion into a solution processable bis-stilbene-based laser dye. By blending the laser dye with 20 wt&#37; of the quencher, negligible effects on the ASE thresholds, but a complete suppression of singlet–triplet annihilation (STA) and a 20-fold increase in excited-state photostability of the laser dye under CW excitation, were achieved. We used small-area OLEDs (0.2 mm2) to demonstrate efficient STA suppression by the quencher in the nanosecond range, supported by simulations to provide insights into the observed STA quenching under electrical excitation. The results demonstrate excellent triplet quenching ability under both optical and electrical excitations in the nanosecond range, coupled with excellent solution processability.

    DOI： 10.1038/s41467-020-19443-z

  • Solution-Processed Dendrimer-Based TADF Materials for Deep-Red OLEDs Reviewed

    Emma V. Puttock, Chandana Sampath Kumara Ranasinghe, Mohammad Babazadeh, Junhyuk Jang, David M. Huang, Youichi Tsuchiya, Chihaya Adachi, Paul L. Burn, Paul E. Shaw

    Macromolecules   53 ( 23 )   10375 - 10385   2020.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.macromol.0c02235

  • Correlated Triplet Pair Formation Activated by Geometry Relaxation in Directly Linked Tetracene Dimer (5,5′-Bitetracene) Reviewed

    6 ( 4 )   2638 - 2643   2020.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsomega.0c04809

  • Modulating the ground state, stability and charge transport in OFETs of biradicaloid hexahydro-diindenopyrene derivatives and a proposed method to estimate the biradical character International journal

    Chemical Science   11 ( 44 )   12194 - 12205   2020.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0sc04583g

  • Role of Spontaneous Orientational Polarization in Organic Donor–Acceptor Blends for Exciton Binding Reviewed

    8 ( 21 )   2000896 - 2000896   2020.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Electron-hole pairs at the interface between electron-donating and electron-accepting molecules form charge-transfer excitons (CTEs) via Coulomb attraction. Generally, the attraction energy of the CTE is weaker than that of the Frenkel exciton because of spatial separation of the charge pair; thus, the binding of the CTE is expected to be sensitive to an electric field. Here, the shielding of the binding energy of the CTEs by an internal electric field induced by spontaneous orientation polarization (SOP) of the solid-state donor-acceptor blend film is reported. When the blend film forms a large SOP, the photogenerated CTEs spontaneously dissociate without an external electric field, resulting in carrier diffusion and carrier lifetimes that are in the milliseconds or longer. In the absence of a large SOP, the CTEs preferentially form exciplexes that quickly release their energy as light rather than dissociation. Hence, the control of SOP in the donor-acceptor blend films can provide new insights into exciton binding and facilitate the development of tailored high-performance organic semiconductor devices.

    DOI： 10.1002/adom.202000896

  • Enhancing spin-orbital coupling in deep-blue/blue TADF emitters by minimizing the distance from the heteroatoms in donors to acceptors Reviewed

    Minghan Cai, Morgan Auffray, Dongdong Zhang, Yuewei Zhang, Ryo Nagata, Zesen Lin, Xun Tang, Chin-Yiu Chan, Yi-Ting Lee, Tianyu Huang, Xiaozeng Song, Youichi Tsuchiya, Chihaya Adachi, Lian Duan

    Chemical Engineering Journal   127591 - 127591   2020.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cej.2020.127591

  • Intramolecular-rotation driven triplet-to-singlet upconversion and fluctuation induced fluorescence activation in linearly connected donor–acceptor molecules Reviewed

    153 ( 20 )   204702 - 204702   2020.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0029608

  • Lasing Operation under Long‐Pulse Excitation in Solution‐Processed Organic Gain Medium: Toward CW Lasing in Organic Semiconductors Reviewed

    Van T. N. Mai, Atul Shukla, A. M. Chathuranganie Senevirathne, Ilene Allison, Hyunsoo Lim, Romain J. Lepage, Sarah K. M. McGregor, Michael Wood, Toshinori Matsushima, Evan G. Moore, Elizabeth H. Krenske, Atula S. D. Sandanayaka, Chihaya Adachi, Ebinazar B. Namdas, Shih‐Chun Lo

    8 ( 21 )   2001234 - 2001234   2020.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202001234

  • Organic Long‐Persistent Luminescence from a Thermally Activated Delayed Fluorescence Compound Reviewed

    Wenbo Li, Zhaoning Li, Changfeng Si, Michael Y. Wong, Kazuya Jinnai, Abhishek Kumar Gupta, Ryota Kabe, Chihaya Adachi, Wei Huang, Eli Zysman‐Colman, Ifor D. W. Samuel

    32 ( 45 )   2003911 - 2003911   2020.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.202003911

  • Precise Exciton Management of Quaternary Emission Layers for Highly Stable Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence Reviewed

    Masaki Tanaka, Ryo Nagata, Hajime Nakanotani, Chihaya Adachi

    ACS Applied Materials & Interfaces   12 ( 45 )   50668 - 50674   2020.11

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.0c15208

  • Synthesis and photochromic behaviour of a series of benzopyrans bearing an N-phenyl-carbazole moiety: photochromism control by the steric effect Reviewed

    Photochemical & Photobiological Sciences   19 ( 10 )   1344 - 1355   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0pp00202j

  • Hydrogen bond-modulated molecular packing and its applications in high-performance non-doped organic electroluminescence

    Yizhong Shi, Kai Wang, Youichi Tsuchiya, Wei Liu, Takeshi Komino, Xiaochun Fan, Dianming Sun, Gaole Dai, Jiaxiong Chen, Ming Zhang, Caijun Zheng, Shiyun Xiong, Xuemei Ou, Jia Yu, Jiansheng Jie, Chun-Sing Lee, Chihaya Adachi, Xiaohong Zhang

    Materials Horizons   7 ( 10 )   2734 - 2740   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0mh00952k

  • Understanding the Degradation of Spiro‐OMeTAD‐Based Perovskite Solar Cells at High Temperature Reviewed

    4 ( 10 )   2000305 - 2000305   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/solr.202000305

  • Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states Reviewed

    Lin-Song Cui, Alexander J. Gillett, Shou-Feng Zhang, Hao Ye, Yuan Liu, Xian-Kai Chen, Ze-Sen Lin, Emrys W. Evans, William K. Myers, Tanya K. Ronson, Hajime Nakanotani, Sebastian Reineke, Jean-Luc Bredas, Chihaya Adachi, Richard H. Friend

    Nature Photonics   14 ( 10 )   636 - 642   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41566-020-0668-z

  • High performance planar microcavity organic semiconductor lasers based on thermally evaporated top distributed Bragg reflector Reviewed

    Applied Physics Letters   117 ( 15 )   153301 - 153301   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0016052

  • Low Amplified Spontaneous Emission and Lasing Thresholds from Hybrids of Fluorenes and Vinylphenylcarbazole Reviewed

    Advanced Optical Materials   8 ( 20 )   2000784 - 2000784   2020.10

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.202000784

  • Partial Modification of Electron-withdrawing Groups in Thermally-activated Delayed Fluorescence Materials Aimed to Improve Efficiency and Stability Reviewed

    Masayuki Yokoyama, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

    Chemistry Letters   49 ( 10 )   1189 - 1193   2020.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.200435

  • Organic Photostimulated Luminescence

    Manabu Sakurai, Ryota Kabe, Masaaki Fuki, Zesen Lin, Kazuya Jinnai, Yasuhiro Kobori, Chihaya Adachi, Takashi Tachikawa

    2020.9

    　More details

    Language：Others  

    DOI： 10.26434/chemrxiv.12956456

  • The effect of current density–voltage measurement conditions on the operational stability of hybrid perovskite solar cells Reviewed

    117 ( 10 )   103503 - 103503   2020.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0023622

  • Stable room-temperature continuous-wave lasing in quasi-2D perovskite films Reviewed

    Chuanjiang Qin, Atula S. D. Sandanayaka, Chenyang Zhao, Toshinori Matsushima, Dezhong Zhang, Takashi Fujihara, Chihaya Adachi

    Nature   585 ( 7823 )   53 - 57   2020.9

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41586-020-2621-1

  • The Leap from Organic Light-Emitting Diodes to Organic Semiconductor Laser Diodes Reviewed

    Chihaya Adachi, Atula S. D. Sandanayaka

    CCS Chemistry   2 ( 4 )   1203 - 1216   2020.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.31635/ccschem.020.202000327

  • Sub-Microsecond TADF Emission in D-D′-A Emitters Reviewed

    49 ( 8 )   932 - 935   2020.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.200337

  • Surface Segregation of a Star-Shaped Polyhedral Oligomeric Silsesquioxane in a Polymer Matrix Reviewed

    Kentaro Yamamoto, Daisuke Kawaguchi, Tatsuki Abe, Takeshi Komino, Masashi Mamada, Taizo Kabe, Chihaya Adachi, Kensuke Naka, Keiji Tanaka

    Langmuir   36 ( 33 )   9960 - 9966   2020.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.langmuir.0c01785

  • Near-infrared absorbing pyrrolopyrrole aza-BODIPY-based donor-acceptor polymers with reasonable photoresponse

    Ru Feng, Narumi Sato, Mayuka Nomura, Akinori Saeki, Hajime Nakanotani, Chihaya Adachi, Takuma Yasuda, Hiroyuki Furuta, Soji Shimizu

    Journal of Materials Chemistry C   8 ( 26 )   8770 - 8776   2020.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0tc01487g

  • Nanoscale Electronic Properties of Triplet-State-Engineered Halide Perovskites Reviewed

    Ghaida Alosaimi, Chuanjiang Qin, Toshinori Matsushima, Chihaya Adachi, Jan Seidel

    The Journal of Physical Chemistry C   124 ( 27 )   14811 - 14817   2020.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.0c03996

  • High EQE and high brightness solution-processed TADF light-emitting transistors and OLEDs Reviewed International journal

    8 ( 11 )   2000554   2020.7

    　More details

    Language：English  

    DOI： 10.1002/adom.202000554

  • Ion Migration-Induced Degradation and Efficiency Roll-off in Quasi-2D Perovskite Light-Emitting Diodes Reviewed

    Tai Cheng, Ganbaatar Tumen-Ulzii, Dino Klotz, Satoru Watanabe, Toshinori Matsushima, Chihaya Adachi

    ACS Applied Materials & Interfaces   12 ( 29 )   33004 - 33013   2020.7

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.0c06737

  • Visual Understanding of Vibronic Coupling and Quantitative Rate Expression for Singlet Fission in Molecular Aggregates Reviewed

    Katsuyuki Shizu, Chihaya Adachi, Hironori Kaji

    Bulletin of the Chemical Society of Japan   2020.6

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.20200159

  • An organic laser dye having a small singlet-triplet energy gap makes the selection of a host material easier Reviewed International journal

    Buddhika S. B. Karunathilaka; Umamahesh Balijapalli; Chathuranganie A. M. Senevirathne; Yu Esaki; Toshinori Matsushima; Atula S. D. Sandanayaka; Chihaya Adachi

    Advanced Functional Materials   30 ( 30 )   2001078   2020.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.202001078

  • Exciton-exciton annihilation in thermally activated delayed fluorescence emitter Reviewed International journal

    Advanced Functional Materials   2000580   2020.6

    　More details

    Language：English  

    DOI： 10.1002/adfm.202000580

  • Enhancing Small-Molecule Organic Photodetector Performance for Reflectance-Mode Photoplethysmography Sensor Applications Reviewed

    Anubha Bilgaiyan, Fahed Elsamnah, Hiroshi Ishidai, Chang-Hoon Shim, Muhamad Affiq Bin Misran, Chihaya Adachi, Reiji Hattori

    ACS Applied Electronic Materials   2 ( 5 )   1280 - 1288   2020.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsaelm.0c00082

  • A 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HAT-CN) transport layer with high electron mobility for thick organic light-emitting diodes Reviewed International journal

    Kenta Yamaguchi; Toshinori Matsushima; Chihaya Adachi

    AIP Advances   10   055304   2020.5

    　More details

    Language：English  

    DOI： 10.1063/5.0007310

  • Hysteresis-less and stable perovskite solar cells with a self-assembled monolayer Reviewed International journal

    Ganbaatar Tumen-Ulzii; Toshinori Matsushima; Dino Klotz; Matthew R. Leyden; Pangpang Wang; Chuanjiang Qin; Jin-Wook Lee; Sung-Joon Lee; Yang Yang; Chihaya Adachi

    Communications Materials   1   31   2020.5

    　More details

    Language：English  

    DOI： 10.1038/s43246-020-0028-z

  • F8BT Oligomers for Organic Solid-State Lasers Reviewed International journal

    Masashi Mamada; Ryutaro Komatsu; Chihaya Adachi

    ACS Appl. Mater. Interfaces   12 ( 25 )   28383 - 28391   2020.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.0c05449

  • Enhanced operational durability of thermally activated delayed fluorescence-based organic light-emitting diodes with a triazine electron transporter Reviewed International journal

    Kenta Yamaguchi; Toshinori Matsushima; Atula S. D. Sandanayaka; Yoko Homma; Naoki Uchida; Chihaya Adachi

    Chemistry A European Journal   26 ( 25 )   5598 - 5602   2020.5

    　More details

    Language：English  

    DOI： 10.1002/chem.201905345

  • Molecular Design Based on Donor-Weak Donor Scaffold for Blue Thermally-Activated Delayed Fluorescence Designed by Combinatorial DFT Calculations Reviewed

    Youichi Tsuchiya, Keita Tsuji, Ko Inada, Fatima Bencheikh, Yan Geng, H. Shaun Kwak, Thomas J.L. Mustard, Mathew D. Halls, Hajime Nakanotani, Chihaya Adachi

    Frontiers in Chemistry   8   2020.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fchem.2020.00403

  • 【2020-2】Effect of Vibronic Coupling on Correlated Triplet Pair Formation in the Singlet Fission Process of Linked Tetracene Dimers Reviewed

    124 ( 18 )   3641 - 3651   2020.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Excited State Dynamics of Thermally Activated Delayed Fluorescence from an Excited State Intramolecular Proton Transfer System Reviewed International journal

    Yun Long; Masashi Mamada; Chunyong Li; Paloma Lays dos Santos; Marco Colella; Andrew Danos; Chihaya Adachi; Andrew Monkman

    The Journal of Physical Chemistry Letters   11 ( 9 )   3305 - 3312   2020.4

    　More details

    Language：English  

    DOI： 10.1021/acs.jpclett.0c00498

  • Stoichiometry control for the tuning of grain passivation and domain distribution in green quasi-2D metal halide perovskite films and light-emitting diodes Reviewed International journal

    Tai Cheng; Chuanjiang Qin; Satoru Watanabe; Toshinori Matsushima; Chihaya Adachi

    Advanced Functional Materials   30 ( 24 )   2001816   2020.4

    　More details

    Language：English  

    DOI： 10.1002/adfm.202001816

  • Nanosecond-Time-Scale Delayed Fluorescence Molecule for Deep-Blue OLEDs with Small Efficiency Rolloff Reviewed International journal

    Jong Uk Kim; In Seob Park; Chin-Yiu Chan; Masaki Tanaka; Youichi Tsuchiya; Hajime Nakanotani; Chihaya Adachi

    Nature Communications   11   1965   2020.4

    　More details

    Language：English  

    DOI： 10.1038/s41467-020-15558-5

  • Many exciplex systems exhibit organic long-persistent luminescence Reviewed International journal

    Naohiro Nishimura; Zesen Lin; Kazuya Jinnai; Ryota Kabe; Chihaya Adachi

    Advanced Functional Materials   30 ( 22 )   2000795   2020.4

    　More details

    Language：English  

    DOI： 10.1002/adfm.202000795

  • Killer Impurities in Vacuum Chamber that Affect the Lifetime of Organic Light-Emitting Diodes Reviewed International journal

    Hiroshi Fujimoto; Toshimitsu Nakamura; Kaori Nagayoshi; Kentaro Harada; Hiroshi Miyazaki; Takaomi Kurata; Junya Kiyota; Chihaya Adachi

    Applied Physics Letters   116   143301   2020.4

    　More details

    Language：English  

    DOI： 10.1063/1.5141101

  • Understanding degradation of organic lightemitting diodes from magnetic field effects Reviewed International journal

    Masaki Tanaka; Ryo Nagata; Hajime Nakanotani; Chihaya Adachi

    Communication Materials   1 ( 1 )   18   2020.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s43246-020-0019-0

  • Detrimental Effect of Unreacted PbI2 on the Long-Term Stability of Perovskite Solar Cells Reviewed International journal

    Ganbaatar Tumen-Ulzii; Chuanjiang Qin; Dino Klotz; Matthew R. Leyden ; Pangpang Wang; Morgan Auffray; Takashi Fujihara; Toshinori Matsushima; Jin-Wook Lee; Sung-Joon Lee; Yang Yang; Chihaya Adachi

    Advanced Materials   1905035   2020.4

    　More details

    Language：English  

    DOI： 10.1002/adma.201905035

  • A spirofluorene-end-capped bis-stilbene derivative with a low amplified spontaneous emission threshold and balanced hole and electron mobilities Reviewed International journal

    Shi-Bin Ruan; Chin-Yiu Chan; Hao Ye; Ko Inada; Fatima Bencheikh; Atula S. D. Sandanayaka; Toshinori Matsushima; Chihaya Adachi

    Optical Materials   100   109636   2020.2

    　More details

    Language：English  

    DOI： 10.1016/j.optmat.2019.109636

  • Triplet management for efficient perovskite light-emitting diodes Reviewed

    Chuanjiang Qin, Toshinori Matsushima, William J. Potscavage, Atula S. D. Sandanayaka, Matthew R. Leyden, Fatima Bencheikh, Kenichi Goushi, Fabrice Mathevet, Benoit Heinrich, Go Yumoto, Yoshihiko Kanemitsu, Chihaya Adachi

    NATURE PHOTONICS   14 ( 2 )   70 - +   2020.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41566-019-0545-9

  • Utilization of multi hetero-donors in thermally activated delayed fluorescence molecules and their high performance bluish-green OLEDs Reviewed International journal

    Umamahesh Balijapalli; Masaki Tanaka; Morgan Auffray; Chin-Yiu Chan; Yi-Ting Lee; Youichi Tsuchiya; Hajime Nakanotani; Chihaya Adachi

    ACS Appl. Mater. Interfaces   12 ( 8 )   9498 - 9506   2020.2

    　More details

    Language：English  

    DOI： 10.1021/acsami.9b20020

  • Intersystem Crossing Rate in Thermally Activated Delayed Fluorescence Emitters Reviewed

    Takashi Kobayashi, Daisuke Kawate, Akitsugu Niwa, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    Physica Status Solidi (A) Applications and Materials Science   217 ( 3 )   2020.2

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/pssa.201900616

  • Highly effective nicotinonitrile-derivatives-based thermally activated delayed fluorescence emitter with asymmetric molecular architecture for high-performance organic light-emitting diodes Reviewed

    Shin Hyung Choi, Chan Hee Lee, Chihaya Adachi, Sae Youn Lee

    Dyes and Pigments   172   2020.1

    　More details

    Language：English  

    DOI： 10.1016/j.dyepig.2019.107849

  • The Role of reverse intersystem crossing using a TADF-type acceptor molecule on the device stability of exciplex based organic-light emitting diodes Reviewed International journal

    Thanh Ba Nguyen; Hajime Nakanotani; Takuji Hatakeyama; Chihaya Adachi

    Advanced Materials   32 ( 9 )   1906614   2020.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201906614

  • Design strategy for robust organic semiconductor laser dyes Reviewed International journal

    Yuya Oyama; Masashi Mamada; Atul Shukla; Evan G. Moore; Shih-Chun Lo; Ebinazar B. Namdas; Chihaya Adachi

    ACS Materials Letters   2 ( 2 )   161 - 167   2020.1

    　More details

    Language：English  

    DOI： 10.1021/acsmaterialslett.9b00536

  • Interplay among thermoelectric properties, atmospheric stability, and electronic structures in solution-deposited thin films of P(NaX[Niett]) Reviewed International journal

    Sunbin Hwang; William J. Potscavage, Chihaya Adachi

    Advanced Electronic Materials   6 ( 3 )   1901172   2020.1

    　More details

    Language：English  

    DOI： 10.1002/aelm.201901172

  • Molecular orientation of disk-shaped small molecule exhibiting thermally activated delayed fluorescence in host-guest films Reviewed International journal

    Masaki Tanaka; Hiroki Noda; Hajime Nakanotani; Chihaya Adachi

    Applied Physics Letters   116 ( 2 )   023302   2020.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5140210

  • Molecular design of highly effective thermally activated delayed fluorescence emitters based on ortho-substituted donor-acceptor-donor pyridinecarbonitrile derivatives and their application for high-performance OLEDs Reviewed

    Shin Hyung Choi, Chan Hee Lee, Chihaya Adachi, Sae Youn Lee

    Dyes and Pigments   171   2019.12

    　More details

    Language：English  

    DOI： 10.1016/j.dyepig.2019.107775

  • Enhanced Energy Transfer in Doped Bifluorene Single Crystals: Prospects for Organic Lasers Reviewed International journal

    Advanced Optical Materials   1901670   2019.12

    　More details

    Language：English  

    DOI： 10.1002/adom.201901670

  • Orange Organic Long-persistent Luminescence from an Electron Donor/Acceptor Binary System Reviewed International journal

    Zesen Lin; Ryota Kabe; Chihaya Adachi

    Chemistry Letters   49 ( 2 )   203 - 206   2019.12

    　More details

    Language：English  

    DOI： 10.1246/cl.190823

  • Observation of Nonradiative Deactivation Behavior from Singlet and Triplet States of Thermally Activated Delayed Fluorescence Emitters in Solution Reviewed International journal

    Naoto Notsuka; Hajime Nakanotani; Hiroki Noda; Kenichi Goushi; Chihaya Adachi

    J. Phys. Chem. Lett.   11 ( 2 )   562 - 566   2019.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.9b03302

  • Slow recombination of spontaneously dissociated organic fluorophore excitons Reviewed International journal

    Takahiko Yamanaka; Hajime Nakanotani; Chihaya Adachi

    Nature Communications   10   5748   2019.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-019-13736-8

  • Thermally activated delayed fluorescence with 7&#37; external quantum efficiency from a light-emitting electrochemical cell Reviewed International journal

    Petter Lundberg; Youichi Tsuchiya; E. Mattias Lindh; Shi Tang; Chihaya Adachi; Ludvig Edman

    Nature Communications   10   5307   2019.11

    　More details

    Language：English  

    DOI： 10.1038/s41467-019-13289-w

  • Origin of external quantum efficiency roll-off in 4,4′-bis[(N-carbazole)styryl]biphenyl (BSBCz)-based inverted organic light emitting diode under high pulsed electrical excitation Reviewed International journal

    126 ( 18 )   185501   2019.11

    　More details

    Language：English  

    DOI： 10.1063/1.5121485

  • Excited-state stability of quasi-two-dimensional metal halide perovskite films under optical and electrical excitations Reviewed International journal

    Satoru Watanabe; Tai Cheng; Ganbaatar Tumen-Ulzii; Chuanjiang Qin; Toshinori Matsushima; Chihaya Adachi

    Applied Physics Letters   115 ( 23 )   233502   2019.11

    　More details

    Language：English  

    DOI： 10.1063/1.5127308

  • Through Space Charge Transfer for Efficient Sky-Blue Thermally Activated Delayed Fluorescence (TADF) Emitter with Unconjugated Connection Reviewed International journal

    Ya-Kun Wang; Chen-Chao Huang; Hao Ye; Cheng Zhong; Aziz Khan; Sheng-Yi Yang; Man-Keung Fung; Zuo-Quan Jiang; Chihaya Adachi; Liang-Sheng Liao

    Advanced Optical Materials   1901150   2019.11

    　More details

    Language：English  

    DOI： 10.1002/adom.201901150

  • Triplet–triplet upconversion enhanced by spin–orbit coupling in organic light-emitting diodes Reviewed International journal

    10   5283   2019.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Triplet-triplet upconversion, in which two triplet excitons are converted to one singlet exciton, is a well-known approach to exceed the limit of electroluminescence quantum efficiency in conventional fluorescence-based organic light-emitting diodes. Considering the spin multiplicity of triplet pairs, upconversion efficiency is usually limited to 20&#37;. Although this limit can be exceeded when the energy of a triplet pair is lower than that of a second triplet excited state, such as for rubrene, it is generally difficult to engineer the energy levels of higher triplet excited states. Here, we investigate the upconversion efficiency of a series of new anthracene derivatives with different substituents. Some of these derivatives show upconversion efficiencies close to 50&#37; even though the calculated energy levels of the second triplet excited states are lower than twice the lowest triplet energy. A possible upconversion mechanism is proposed based on the molecular structures and quantum chemical calculations.

    DOI： 10.1038/s41467-019-13044-1

  • Detecting and identifying reversible changes in perovskite solar cells by electrochemical impedance spectroscopy Reviewed International journal

    Dino Klotz; Ganbaatar Tumen-Ulzii; Chuanjiang Qin; Toshinori Matsushima; Chihaya Adachi

    RSC Advances   9   33436 - 33445   2019.10

    　More details

    Language：English  

    DOI： 10.1039/C9RA07048F

  • Film Transfer of Structured Organo-Lead-Halide Perovskite for Low-Cost Lasing Applications Reviewed International journal

    Matthew R. Leyden; Toshinori Matsushima; Fatima Bencheikh; Chihaya Adachi

    Applied Physics Letters   115 ( 14 )   141106   2019.10

    　More details

    Language：English  

    DOI： 10.1063/1.5113647

  • Origin of dual emission in σ-bridged donor–acceptor TADF compounds Reviewed International journal

    7   12601 - 12609   2019.9

    　More details

    Language：English  

    DOI： 10.1039/C9TC03548F

  • High-Triplet-Energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-Blue Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes with Reduced Roll-off Reviewed International journal

    Jong Uk Kim; Michael Y. Wong; Shiv Kumar; Oliver G. Hayes; Finlay Duncan; Chin-Yiu Chan; Ben Yiu-Wing Wong; Hao Ye; Lin-Song Cui; Hajime Nakanotani; Eli Zysman-Colman; Chihaya Adachi

    Chemistry Letters   48 ( 10 )   1225 - 1228   2019.9

    　More details

    Language：English  

    DOI： 10.1246/cl.190412

  • Large metal halide perovskite crystals for field-effect transistor applications Reviewed International journal

    Toshinori Matsushima; Matthew R. Leyden; Takashi Fujihara; Chuanjiang Qin; Atula S. D. Sandanayaka; Chihaya Adachi

    Applied Physics Letters   115   120601   2019.9

    　More details

    Language：English  

    DOI： 10.1063/1.5116411

  • Luminescent Cu(I) and Ag(I) Coordination Polymers: Fast Phosphorescence or Thermally Activated Delayed Fluorescence Reviewed International journal

    Gang-Yuan Li; Hao Ye; Fu-Cheng Zhu; Yan Geng; Jian-Zhong Fan; Jian-Ping Ma; Chihaya Adachi; Yu-Bin Dong

    Chinese Chemical Letters   30 ( 11 )   1931 - 1934   2019.9

    　More details

    Language：English  

    DOI： 10.1016/j.cclet.2019.08.006

  • Critical role of intermediate electronic states for spin-flip processes in charge-transfer-type organic molecules with multiple donors and acceptors Reviewed International journal

    Hiroki Noda; Xian-Kai Chen; Hajime Nakanotani; Takuya Hosokai; Momoka Miyajima; Naoto Noutsuka; Yuuki Kashima; Jean-Luc Bredas; Chihaya Adachi

    Nature Materials   18 ( 10 )   1084 - 1090   2019.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41563-019-0465-6

  • Carrier Recombination and Diffusion in Wet-Cast Tin Iodide Perovskite Layers Under High Intensity Photoexcitation Reviewed International journal

    J. Phys. Chem. C   123 ( 32 )   19275 - 19281   2019.7

    　More details

    Language：English  

    DOI： 10.1021/acs.jpcc.9b03226

  • High performance from extraordinarily thick organic light-emitting diodes Reviewed International journal

    Toshinori Matsushima; Fatima Bencheikh; Takeshi Komino; Matthew R. Leyden; Atula S. D. Sandanayaka; Chuanjiang Qin; Chihaya Adachi

    Nature   572   502 - 506   2019.7

    　More details

    Language：English  

    DOI： 10.1038/s41586-019-1435-5

  • Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100&#37; Internal Quantum Efficiency Reviewed International journal

    Jia-Xiong Chen; Wen-Wen Tao; Wen-Cheng Chen; Ya-Fang Xiao; Kai Wang; Chen Cao ; Jia Yu; Shengliang Li; Feng-Xia Geng; Chihaya Adachi; Chun-Sing Lee; Xiao-Hong Zhang

    Angewandte Chemie International Edition   58 ( 41 )   14660 - 14665   2019.6

    　More details

    Language：English  

    DOI： 10.1002/anie.201906575

  • Toward air-stable field-effect transistors with a tin iodide-based hybrid perovskite semiconductor Reviewed International journal

    Toshinori Matsushima; Shinobu Terakawa; Matthew R. Leyden; Takashi Fujihara; Chuanjiang Qin; Chihaya Adachi

    Journal of Applied Physics   125   235501   2019.6

    　More details

    Language：English  

    DOI： 10.1063/1.5097433

  • TADF activation by solvent freezing: The role of nonradiative triplet decayand spin-orbit coupling in carbazole benzonitrile derivatives Reviewed International journal

    Hosokai Takuya; Nakanotani Hajime; Santou S.; Noda Hiroki ; Nakayama Yasuo; Adachi Chihaya

    Synthetic Metals   252   62 - 68   2019.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.synthmet.2019.04.005

  • A chemical structure approach enhancing light outcoupling of dopant OLEDs and internal quantum efficiency of non-dopant OLEDs having bluish TADF emitters

    Yi Ting Lee, Po Chen Tseng, Takeshi Komino, Masashi Mamada, Jiun Haw Lee, Chihaya Adachi, Chao Tsen Chen, Chin Ti Chen

    Digest of Technical Papers - SID International Symposium   50 ( Book 1 )   470 - 473   2019.5

    　More details

    Language：Others   Publishing type：Research paper (other academic)  

    DOI： 10.1002/sdtp.12958

  • Temperature dependence of the intersystem crossing rate in thermally activated delayed fluorescence emitters

    Takashi Kobayashi, Daisuke Kawase, Akitsugu Niwa, Atsumi Kayamyo, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    2019 COMPOUND SEMICONDUCTOR WEEK (CSW)   2019.5

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • Intramolecular Noncovalent Interactions Facilitate Thermally Activated Delayed Fluorescence (TADF) Reviewed International journal

    Xian-Kai Chen; Brandon W. Bakr; Morgan Auffray; Youichi Tsuchiya; C. David Sherrill; Chihaya Adachi; Jean-Luc Bredas

    The Journal of Physical Chemistry Letters   10 ( 12 )   3260 - 3268   2019.5

    　More details

    Language：English  

    DOI： 10.1021/acs.jpclett.9b01220

  • Photoluminescence Quenching Probes Spin Conversion and Exciton Dynamics in Thermally Activated Delayed Fluorescence Materials Reviewed International journal

    Advanced Materials   31 ( 21 )   1804490   2019.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201804490

  • Suppression of Structural Change upon S-1-T-1 Conversion Assists the Thermally Activated Delayed Fluorescence Process in Carbazole-Benzonitrile Derivatives Reviewed

    Saigo Masaki, Miyata Kiyoshi, Tanaka Sei'ichi, Nakanotani Hajime, Adachi Chihaya, Onda Ken

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   10 ( 10 )   2475 - 2480   2019.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Suppression of Structural Change upon S-1-T-1 Conversion Assists the Thermally Activated Delayed Fluorescence Process in Carbazole-Benzonitrile Derivatives
    Thermally activated delayed fluorescence (TADF) molecules are gathering attention for their potential to boost the efficiency of organic light-emitting diodes without precious metals. Minimizing the energy difference between the S-1 and T-1 states (Delta E-ST) is a fundamental strategy to accelerate reverse intersystem crossing (RISC). However, the lack of microscopic understanding of the process prevents adequate design strategies for efficient TADF materials. Here, we focused on four carbazole-benzonitrile (Cz-BN) derivatives that possess identical Delta E-ST but distinct TADF activities. We systematically compared their geometrical dynamics upon photo excitation using time-resolved infrared (TR-IR) vibrational spectroscopy in conjunction with quantum chemical calculations. We found that the most TADF-active molecule, 4CzBN, shows little structural change after photoexcitation, while the TADF-inactive molecules show relatively large deformation upon S-1-T-1 onversion. This implies that the suppression of structural deformation is critical for minimizing the activation energy barrier for RISC in cases of the Cz-BN derivatives.

    DOI： 10.1021/acs.jpclett.9b00810

  • Dithia[3.3]paracyclophane Core: a Versatile Platform for Fine Triplet State Tuning and Through Space TADF Emission Reviewed International journal

    Chemistry - An Asian Journal   14 ( 11 )   1921 - 1925   2019.5

    　More details

    Language：English  

    DOI： 10.1002/asia.201900401

  • Discussion on hole traps of amorphous films of N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine (α-NPD) deposited at different substrate temperatures Reviewed International journal

    114   173301   2019.5

    　More details

    Language：English  

    DOI： 10.1063/1.5089269

  • Turn on of Sky-Blue Thermally Activated Delayed Fluorescence and Circularly Polarized Luminescence (CPL) via Increased Torsion by a Bulky Carbazolophane Donor Reviewed International journal

    Chemical Science   10   6689 - 6696   2019.5

    　More details

    Language：English  

    DOI： 10.1039/C9SC01821B

  • Indication of current-injection lasing from an organic semiconductor Reviewed International journal

    Atula S. D. Sandanayaka; Toshinori Matsushima ; Fatima Bencheikh; Shinobu Terakawa; William J. Potscavage Jr.; Chuanjiang Qin; Takashi Fujihara; Kenichi Goushi; Jean-Charles Ribierre; Chihaya Adachi

    Applied Physics Express   12 ( 6 )   061010   2019.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/1882-0786/ab1b90

  • Anisotropy of Thermal Diffusivity in Lead Halide Perovskite Layers Revealed by Thermal Grating Technique Reviewed International journal

    Patrik Scajev; Ramunas Aleksiejunas; Shinobu Terakawa; Chuanjiang Qin; Takashi Fujihara; Toshinori Matsushima; Chihaya Adachi; Saulius Jursenas

    The Journal of Physical Chemistry C   123 ( 24 )   14914 - 14920   2019.5

    　More details

    Language：English  

    DOI： 10.1021/acs.jpcc.9b02288

  • Thermally Activated Delayed Fluorescence Carbonyl Derivatives for Organic Light-Emitting Diodes with Extremely Narrow Full Width at Half-Maximum Reviewed

    Xing Li, Yi Zhong Shi, Kai Wang, Ming Zhang, Cai Jun Zheng, Dian Ming Sun, Gao Le Dai, Xiao Chun Fan, De Qi Wang, Wei Liu, Yan Qing Li, Jia Yu, Xue Mei Ou, Chihaya Adachi, Xiao Hong Zhang

    ACS Applied Materials and Interfaces   11 ( 14 )   13472 - 13480   2019.4

    　More details

    Language：English  

    DOI： 10.1021/acsami.8b19635

  • Series of polar alcohol-additives assisted improvement in the PEDOT:PSS film property and bulk-heterojunction organic solar cell performance Reviewed

    Yanqiong Zheng, Junle Yu, Jie Tang, Fang Yang, Chao Wang, Bin Wei, Xifeng Li, Chihaya Adachi

    Journal of Physics D: Applied Physics   52 ( 25 )   2019.4

    　More details

    Language：English  

    DOI： 10.1088/1361-6463/ab04dc

  • Electrogenerated Chemiluminescence and Electronic States of Several Organometallic Eu(III) and Tb(III) Complexes: Effects of the Ligands

    Ryoichi Ishimatsu, Eri Kunisawa, Koji Nakano, Chihaya Adachi, Toshihiko Imato

    ChemistrySelect   4 ( 9 )   2815 - 2831   2019.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/slct.201900595

  • Fluorescence lifetime elongation of thermally activated delayed fluorescence 4CzIPN molecules with encapsulation into zeolitic imidazole frameworks ZIF-11 Reviewed

    Harunobu Takeda, Michika Takeda, Hiroaki Yoshioka, Hiroaki Minamide, Yuji Oki, Chihaya Adachi

    Optical Materials Express   9 ( 3 )   1150 - 1160   2019.3

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OME.9.001150

  • The origin of changes in electrical properties of organic films fabricated at various vacuum-deposition rates Reviewed International journal

    Amir Mikaeili; Toshinori Matsushima; Yu Esaki; Sahar Alasvand Yazdani; Chihaya Adachi; Ezeddin Mohajerani

    Optical Materials   91   93 - 100   2019.3

    　More details

    Language：English  

    DOI： 10.1016/j.optmat.2019.03.012

  • Fluorescence lifetime elongation of thermally activated delayed fluorescence 4CzIPN molecules with encapsulation into zeolitic imidazole frameworks ZIF-11 Reviewed

    Harunobu Takeda, Michika Takeda, Hiroaki Yoshioka, Hiroaki Minamide, Yuji Oki, Chihaya Adachi

    OPTICAL MATERIALS EXPRESS   9 ( 3 )   1150 - 1160   2019.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OME.9.001150

  • Fabrication-method Independence of Organic Long-persistent Luminescence Performance Reviewed

    Kazuya Jinnai, Naohiro Nishimura, Ryota Kabe, Chihaya Adachi

    Chemistry Letters   48 ( 3 )   270   2019.3

    　More details

    Language：Others  

    Fabrication-method Independence of Organic Long-persistent Luminescence Performance

    DOI： 10.1246/cl.180949

  • A solvent-free and vacuum-free melt-processing method to fabricate organic semiconducting layers with large crystal size for organic electronic applications Reviewed

    Ribierre Jean-Charles, Li Zhao, Liu Xiao, Lacaze Emmanuelle, Heinrich Benoit, Mery Stephane, Sleczkowski Piotr, Xiao Yiming, Lafolet Frederic, Hashizume Daisuke, Aoyama Tetsuya, Uchiyama Masanobu, Wu Jeong Weon, Zaborova Elena, Fages Frederic, D'Aleo Anthony, Mathevet Fabrice, Adachi Chihaya

    JOURNAL OF MATERIALS CHEMISTRY C   7 ( 11 )   3190 - 3198   2019.3

    　More details

    Language：Others  

    A solvent-free and vacuum-free melt-processing method to fabricate organic semiconducting layers with large crystal size for organic electronic applications

    DOI： 10.1039/c8tc04834g

  • Effect of Carrier Balance on Device Degradation of Organic Light-Emitting Diodes based on Thermally Activated Delayed Fluorescence Emitters Reviewed International journal

    Masaki Tanaka; Hiroki Noda; Hajime Nakanotani; Chihaya Adachi

    Advanced Electronic Materials   5 ( 5 )   1800708   2019.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/aelm.201800708

  • Photostable and highly emissive glassy organic dots exhibiting thermally activated delayed fluorescence Reviewed

    Youichi Tsuchiya, Koudai Ikesue, Hajime Nakanotani, Chihaya Adachi

    Chemical Communications   55 ( 36 )   5215 - 5218   2019.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c9cc01420a

  • Dependence of the amorphous structures and photoluminescence properties of tris(8-hydroxyquinolinato)aluminum films on vacuum deposition conditions Reviewed International journal

    Yu Esaki ; Toshinori Matsushima; Chihaya Adachi

    Organic Electronics   67   237 - 241   2019.1

    　More details

    Language：English  

    DOI： 10.1016/j.orgel.2019.01.032

  • Degradation Mechanism and Stability Improvement Strategy for an Organic Laser Gain Material 4,4′-Bis[(N-carbazole)styryl]biphenyl (BSBCz) Reviewed International journal

    29 ( 10 )   1807148   2019.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Abstract

    The organic material 4,4′‐bis[(N‐carbazole)styryl]biphenyl (BSBCz) is an excellent gain medium for laser devices. However, BSBCz laser output quickly degrades during photoexcitation, which is an issue that must be overcome before it can be used for practical applications. In this study, the photodegradation mechanisms of BSBCz are investigated with the aim of enhancing its excited‐state stability. The photodegradation of BSBCz is attributed to instability of the triplet excited states that would occasionally decompose into other species. This decomposition reduces absorption and introduces exciton quenchers. Incorporating the triplet managing material 9,10‐di(naphtha‐2‐yl)anthracene (ADN) into BSBCz films greatly improves photoluminescence and amplified spontaneous emission stability because of the effective removal of the unstable triplets by ADN. This triplet managing method makes it possible to increase operational stability for BSBCz‐based organic light‐emitting diodes. Therefore, these results will contribute toward the fabrication of stable optically and electrically pumped organic laser diodes.

    DOI： 10.1002/adfm.201807148

  • Distributed Feedback Lasers and Light-Emitting Diodes Using 1-Naphthylmethylamnonium Low-Dimensional Perovskite Reviewed International journal

    Matthew R. Leyden; Shinobu Terakawa; Toshinori Matsushima; Shibin Ruan; Kenichi Goushi; Morgan Auffray; Atula S. D. Sandanayaka; Chuanjiang Qin; Fatima Bencheikh; Chihaya Adachi

    ACS Photonics   6 ( 2 )   460 - 466   2019.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsphotonics.8b01413

  • Enhanced near-infrared electroluminescence from a neodymium complex in organic light-emitting diodes with a solution-processed exciplex host Reviewed

    Applied Physics Letters   114 ( 3 )   2019.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5054721

  • Control of the dual emission from a thermally activated delayed fluorescence emitter containing phenothiazine units in organic light-emitting diodes Reviewed

    RSC Advances   9 ( 8 )   4336 - 4343   2019

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c8ra10393c

  • Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4 Reviewed International journal

    Chin-Yiu Chan; Masaki Tanaka; Hajime Nakanotani; Chihaya Adachi

    Nature Communications   9   5036   2018.11

    　More details

    Language：English  

    DOI： 10.1038/s41467-018-07482-6

  • Highly Efficient Thermally Activated Delayed Fluorescence with Slow Reverse Intersystem Crossing Reviewed International journal

    Hiroki Noda ; Hajime Nakanotani; Chihaya Adachi

    Chemistry Letters   48 ( 2 )   126 - 129   2018.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.180813

  • Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4 Reviewed International journal

    Chin-Yiu Chan; Masaki Tanaka; Hajime Nakanotani; Chihaya Adachi

    Nature Communications   9   5036   2018.11

    　More details

    Language：English  

    DOI： 10.1038/s41467-018-07482-6

  • Highly Efficient Thermally Activated Delayed Fluorescence with Slow Reverse Intersystem Crossing Reviewed International journal

    Hiroki Noda ; Hajime Nakanotani; Chihaya Adachi

    Chemistry Letters   48 ( 2 )   126 - 129   2018.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.180813

  • The relation of phase transition effects and thermal stability of planar perovskite solar cells Reviewed International journal

    Chuanjiang Qin; Toshinori Matsushima; Dino Klotz; Takashi Fujihara; Chihaya Adachi

    Advanced Science   6 ( 1 )   1801079   2018.10

    　More details

    Language：English  

    DOI： 10.1002/advs.201801079

  • Computational Analysis of the Interplay between Deep Level Traps and Perovskite Solar Cell Efficiency Reviewed International journal

    Kara Kearney; Gabseok Seo; Toshinori Matsushima; Chihaya Adachi; Elif Ert; Angus Rockett

    Journal of the American Chemical Society   140 ( 46 )   15655 - 15660   2018.10

    　More details

    Language：English  

    DOI： 10.1021/jacs.8b06002

  • Low ASE Threshold and Efficient Electroluminescence from a Carbazole Derivatized Excited State Intramolecular Proton Transfer (ESIPT) Dye Reviewed

    Van T, N. Mai, Atul Shukla, Masashi Mamada, Satoshi Maedera, Paul E. Shaw, Jan Sobus, Ilene Allison, Chihaya Adachi, Ebinazar B. Namdas, Shih-Chun Lo

    ACS Photonics   2018.10

    　More details

    Language：Others  

    Low ASE Threshold and Efficient Electroluminescence from a Carbazole Derivatized Excited State Intramolecular Proton Transfer (ESIPT) Dye

    DOI： 10.1021/acsphotonics.8b00907

  • The relation of phase transition effects and thermal stability of planar perovskite solar cells Reviewed International journal

    Chuanjiang Qin; Toshinori Matsushima; Dino Klotz; Takashi Fujihara; Chihaya Adachi

    Advanced Science   6 ( 1 )   1801079   2018.10

    　More details

    Language：English  

    DOI： 10.1002/advs.201801079

  • Computational Analysis of the Interplay between Deep Level Traps and Perovskite Solar Cell Efficiency Reviewed International journal

    Kara Kearney; Gabseok Seo; Toshinori Matsushima; Chihaya Adachi; Elif Ert; Angus Rockett

    Journal of the American Chemical Society   140 ( 46 )   15655 - 15660   2018.10

    　More details

    Language：English  

    DOI： 10.1021/jacs.8b06002

  • 【2018-9】Ultrahigh Power Efficiency Thermally Activated Delayed Fluorescent OLEDs by the Strategic Use of Electron‐Transport Materials Reviewed

    6 ( 17 )   1800376   2018.9

    　More details

    Language：English  

    DOI： 10.1002/adom.201800376

  • Wide-Range Tuning and Enhancement of Organic Long-Persistent Luminescence Using Emitter Dopants Reviewed

    Kazuya Jinnai, Ryota Kabe, Chihaya Adachi

    Advanced Materials   1800365   2018.9

    　More details

    Language：Others  

    Wide-Range Tuning and Enhancement of Organic Long-Persistent Luminescence Using Emitter Dopants

    DOI： 10.1002/adma.201800365

  • Organic Long-Persistent Luminescence from a Flexible and Transparent Doped Polymer Reviewed

    Zesen Lin, Ryota Kabe, Naohiro Nishimura, Kazuya Jinnai, Chihaya Adachi

    Advanced Materials   1803713   2018.9

    　More details

    Language：Others  

    Organic Long-Persistent Luminescence from a Flexible and Transparent Doped Polymer

    DOI： 10.1002/adma.201803713

  • Enhanced Electroluminescence from Organic Light-Emitting Diodes with an Organic-Inorganic Perovskite Host Layer Reviewed International journal

    Toshinori Matsushima; Chuanjiang Qin; Kenichi Goushi; Fatima Bencheikh; Takeshi Komino; Matthew Leyden; Atula S. D. Sandanayaka; Chihaya Adachi

    Advanced Materials   30 ( 38 )   1802662   2018.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201802662

  • Enhanced Electroluminescence from Organic Light-Emitting Diodes with an Organic-Inorganic Perovskite Host Layer Reviewed International journal

    Toshinori Matsushima; Chuanjiang Qin; Kenichi Goushi; Fatima Bencheikh; Takeshi Komino; Matthew Leyden; Atula S. D. Sandanayaka; Chihaya Adachi

    Advanced Materials   30 ( 38 )   1802662   2018.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201802662

  • Low Amplified Spontaneous Emission Threshold from Organic Dyes Based on Bis-stilbene Reviewed

    Mamada Masashi, Fukunaga Toshiya, Bencheikh Fatima, Sandanayaka Atula S. D, Adachi Chihaya

    ADVANCED FUNCTIONAL MATERIALS   28 ( 32 )   2018.8

    　More details

    Language：Others  

    Low Amplified Spontaneous Emission Threshold from Organic Dyes Based on Bis-stilbene

    DOI： 10.1002/adfm.201802130

  • Near-Infrared Electroluminescence and Low Threshold Amplified Spontaneous Emission above 800 nm from a Thermally Activated Delayed Fluorescent Emitter Reviewed International journal

    Chemistry of Materials   30 ( 19 )   6702 - 6710   2018.8

    　More details

    Language：English  

    DOI： 10.1021/acs.chemmater.8b02247

  • Vacuum chamber considerations for improved organic light-emitting diode lifetime Reviewed

    Fujimoto Hiroshi, Kobayashi Shin-ichiro, Mo Hin Wai, Yukiwaki Satoshi, Nagayoshi Kaori, Yasumatsu Mao, Harada Kentaro, Adachi Chihaya

    AIP ADVANCES   8 ( 8 )   2018.8

    　More details

    Language：Others  

    Vacuum chamber considerations for improved organic light-emitting diode lifetime

    DOI： 10.1063/1.5047542

  • Triplet-triplet annihilation in a thermally activated delayed fluorescence emitter lightly doped in a host Reviewed

    Akitsugu Niwa, Shota Haseyama, Takashi Kobayashi, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    Applied Physics Letters   113 ( 8 )   083301   2018.8

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5025870

  • A wide-energy-gap naphthalene-based liquid organic semiconductor host for liquid deep-blue organic light-emitting diodes Reviewed

    Naofumi Kobayashi, Hiroyuki Kuwae, Juro Oshima, Ryoichi Ishimatsu, Shuya Tashiro, Toshihiko Imato, Chihaya Adachi, Shuichi Shoji, Jun Mizuno

    Journal of Luminescence   200   19 - 23   2018.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2018.03.072

  • Near-Infrared Electroluminescence and Low Threshold Amplified Spontaneous Emission above 800 nm from a Thermally Activated Delayed Fluorescent Emitter Reviewed International journal

    Chemistry of Materials   30 ( 19 )   6702 - 6710   2018.8

    　More details

    Language：English  

    DOI： 10.1021/acs.chemmater.8b02247

  • Well-ordered films of disk-shaped thermally activated delayed fluorescence (TADF) molecules Reviewed

    Hasegawa, Yuri, Minami, Hayato, Kanada, Satoru, Yamada, Yoichi, Sasaki, Masahiro, Hosokai, Takuya, Nakanotani, Hajime, Adachi, Chihaya

    JOURNAL OF PHOTONICS FOR ENERGY   8 ( 3 )   032110   2018.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Well-ordered films of disk-shaped thermally activated delayed fluorescence (TADF) molecules
    We fabricated well-ordered, crystalline mono-and multilayers of disk-shaped thermally activated delayed fluorescence (TADF) molecules such as 4CzIPN, 2CzPN, and 5CzBN. The slow deposition of these molecules on flat substrates such as Ag(111) at room temperature resulted in the formation of well-ordered and homogeneous monolayers. Moreover, the multilayer of the 4CzIPN was also found to be well-ordered and flat when deposited on highly oriented pyrolytic graphite (HOPG). The electronic states of the crystalline monolayer and multilayer of 4CzIPN were found to be nearly the same, suggesting that the electronic states of both layers are not altered significantly by adsorption on substrates. Indeed, we also confirmed the delayed fluorescence from the crystalline multilayer of 4CzIPN on the HOPG substrate even in an ambient condition. These results show promising applications of crystalline films of disk-shaped TADF-molecules such as 4CzIPN for organic light-emitting diodes devices with high outcoupling efficiency. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)

    DOI： 10.1117/1.JPE.8.032110

  • The Importance of Excited-State Energy Alignment for Efficient Exciplex Systems Based on a Study of Phenylpyridinato Boron Derivatives. Reviewed

    Mamada M, Tian G, Nakanotani H, Su J, Adachi C

    Angewandte Chemie (International ed. in English)   2018.7

    　More details

    Language：Others  

    The Importance of Excited-State Energy Alignment for Efficient Exciplex Systems Based on a Study of Phenylpyridinato Boron Derivatives.

    DOI： 10.1002/anie.201804218

  • Solvent-dependent investigation of carbazole benzonitrile derivatives Does the le 3 - CT 1 energy gap facilitate thermally activated delayed fluorescence? Reviewed

    Takuya Hosokai, Hiroki Noda, Hajime Nakanotani, Takanori Nawata, Yasuo Nakayama, Hiroyuki Matsuzaki, Chihaya Adachi

    Journal of Photonics for Energy   8 ( 3 )   2018.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1117/1.JPE.8.032102

  • Emission properties of thermally activated delayed fluorescence emitters: Analysis based on a four-level model considering a higher triplet excited state

    Takashi Kobayashi, Akitsugu Niwa, Shota Haseyama, Kensho Takaki, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    Journal of Photonics for Energy   8 ( 3 )   2018.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Emission properties of thermally activated delayed fluorescence emitters: Analysis based on a four-level model considering a higher triplet excited state
    © 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). A four-level model consisting of a higher triplet excited state (T2), the lowest singlet and triplet excited states (S1 and T1), and the ground state was previously used to understand emission properties of a thermally activated delayed fluorescence (TADF) emitter, 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN). In this report, we discuss the four-level model in more detail and apply to the other two TADF emitters, i.e., 1,2,4,5-tetrakis(carbazol-9-yl)-3,6-dicyanobenzene (4CzTPN) and 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), in order to determine their excited-state structures. It is suggested that in all the emitters T2 lies between S1 and T1 and play an essential role in the emitting process. In 4CzTPN, phosphorescence from T2 is clearly observed around 100 K as in 4CzIPN. Compared to the other two emitters, 2CzPN has a wider energy gap between S1 and T1 so that delayed fluorescence at room temperature is thought to be mixed with phosphorescence. Because of this mixing, the spectrum characteristic of phosphorescence from T2 in 2CzPN cannot be identified.

    DOI： 10.1117/1.JPE.8.032104

  • Diffusion Enhancement in Highly Excited MAPbI3 Perovskite Layers with Additives Reviewed

    Journal of Physical Chemistry Letters   9 ( 12 )   3167 - 3172   2018.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.8b01155

  • Simultaneous Edge-on to Face-on Reorientation and 1D Alignment of Small pi-Conjugated Molecules Using Room-Temperature Mechanical Rubbing Reviewed

    Ribierre Jean-Charles, Tanaka Toshihiko, Zhao Li, Yokota Yuki, Matsumoto Shinya, Hashizume Daisuke, Takaishi Kazuto, Muto Tsuyoshi, Heinrich Benoit, Mery Stephane, Mathevet Fabrice, Matsushima Toshinori, Uchiyama Masanobu, Adachi Chihaya, Aoyama Tetsuya

    Advanced Functional Materials   28 ( 19 )   2018.5

    　More details

    Language：Others  

    Simultaneous Edge-on to Face-on Reorientation and 1D Alignment of Small pi-Conjugated Molecules Using Room-Temperature Mechanical Rubbing

    DOI： 10.1002/adfm.201707038

  • 2018-5】Observation of Spontaneous Orientation Polarization in Evaporated Films of Organic Light-Emitting Diode Materials Reviewed

    58   313 - 317   2018.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2018.04.026

  • Grain Boundary Engineering of Halide Perovskite CH3NH3PbI3 Solar Cells with Photochemically Active Additives Reviewed

    Nastaran Faraji, Chuanjiang Qin, Toshinori Matsushima, Chihaya Adachi, Jan Seidel

    Journal of Physical Chemistry C   122 ( 9 )   4817 - 4821   2018.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.8b00804

  • Rational Molecular Design for Deep-Blue Thermally Activated Delayed Fluorescence Emitters Reviewed

    Chin-Yiu Chan, Lin-Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

    Advanced Functional Materials   28 ( 11 )   2018.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201706023

  • High-efficiency electroluminescence and amplified spontaneous emission from a thermally activated delayed fluorescent near-infrared emitter Reviewed

    Nature Photonics   12 ( 2 )   98 - 104   2018.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41566-017-0087-y

  • Well-Ordered 4CzIPN ((4s,6s)-2,4,5,6-Tetra(9-H-carbazol-9-yl)isophthalonitrile) Layers: Molecular Orientation, Electronic Structure, and Angular Distribution of Photoluminescence Reviewed

    Y. Hasegawa, Y. Yamada, M. Sasaki, T. Hosokai, H. Nakanotani, C. Adachi

    Journal of Physical Chemistry Letters   9 ( 4 )   863 - 867   2018.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.7b03232

  • Thermally activated delayed fluorescence of a Zr-based metal–organic framework

    54 ( 6 )   631 - 634   2018.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    <p>The first metal–organic framework exhibiting thermally activated delayed fluorescence (TADF) was developed.</p>

    DOI： 10.1039/c7cc08595h

  • Reversible control of triplet dynamics in metal-organic framework-entrapped organic emitters via external gases Reviewed International journal

    Hiroyuki Mieno; Ryota Kabe; Chihaya Adachi

    Communications Chemistry   1   27   2018.1

    　More details

    Language：English  

    DOI： 10.1038/s42004-018-0027-x

  • Low-Threshold Light Amplification in Bifluorene Single Crystals: Role of the Trap States Reviewed

    ACS Applied Materials and Interfaces   10 ( 3 )   2768 - 2775   2018.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.7b14702

  • Deep-Red Amplified Spontaneous Emission from cis-Configured Squaraine Reviewed

    Hao Ye, Linsong Cui, Toshinori Matsushima, Chuanjiang Qin, Chihaya Adachi

    ACS Applied Materials and Interfaces   10 ( 1 )   27 - 31   2018.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.7b15562

  • Exciton diffusion in bifluorene single crystals studied by light induced transient grating technique Reviewed

    Applied Physics Letters   112 ( 3 )   2018.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.5008376

  • The role of fluorine-substitution on the π-bridge in constructing effective thermally activated delayed fluorescence molecules Reviewed

    6 ( 20 )   5536 - 5541   2018

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Two thermally activated delayed fluorescence (TADF) emitters 9′-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)-2-fluorophenyl)-9′H-9,3′:6′,9′′-tercarbazole (TCTZ-F) and 9′-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)-2,6-difluorophenyl)-9′H-9,3′:6′,9′′-tercarbazole (TCTZ-2F) were synthesized and compared to the previously reported molecule 9′-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9′H-9,3′:6′,9′′-tercarbazole (TCTZ) to explore the possible effects of the fluorine atom(s) on the molecular conformation, electronic coupling between the donor and acceptor groups, and consequently the photophysical behavior of the emitters. Specifically, the TCTZ-F molecule was calculated to have a smaller dihedral angle than TCTZ-2F and a smaller S1-T1 gap than TCTZ, which led it to have the highest photoluminescence quantum yield (PLQY) among this series of compounds. An OLED fabricated with TCTZ-F as the emitter achieved the highest external quantum efficiencies (22.5%) of this series, indicating that fluorination can play a useful role in TADF emitters.

    DOI： 10.1039/c8tc01158c

  • Influence of vacuum chamber impurities on OLED degradation Reviewed

    Hiroshi Fujimoto, Takashi Suekane, Katsuya Imanishi, Satoshi Yukiwaki, Hong Wei, Kaori Nagayoshi, Masayuki Yahiro, Chihaya Adachi

    Digest of Technical Papers - SID International Symposium   48 ( 1 )   9 - 12   2017.12

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1002/sdtp.11560

  • Long-lived efficient delayed fluorescence organic light-emitting diodes using n-type hosts Reviewed

    Lin-Song Cui, Shi-Bin Ruan, Fatima Bencheikh, Ryo Nagata, Lei Zhang, Ko Inada, Hajime Nakanotani, Liang-Sheng Liao, Chihaya Adachi

    NATURE COMMUNICATIONS   8   2017.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-017-02419-x

  • Control of the Singlet–Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix Reviewed

    12 ( 1 )   268   2017.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    © 2017, The Author(s). The photoluminescence properties of a thermally activated delayed fluorescence emitter, 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), doped in a host matrix consisting of 1,3-bis(9-carbazolyl)benzene and a polar inert molecule, camphoric anhydride (CA), in various concentrations have been investigated. It is found that the addition of CA stabilizes only the lowest singlet excited state (S1) of 2CzPN without changing the energy level of the lowest triplet excited state (T1), leading to a reduction in the energy gap between S1and T1. The maximum reduction of energy gap achieved in this work has been determined to be around 65 meV from the shift of the fluorescence spectrum and the temperature dependence of the photoluminescence decay rate.

    DOI： 10.1186/s11671-017-2012-1

  • A New Design Strategy for Efficient Thermally Activated Delayed Fluorescence Organic Emitters: From Twisted to Planar Structures Reviewed

    Xian-Kai Chen, Youichi Tsuchiya, Yuma Ishikawa, Cheng Zhong, Chihaya Adachi, Jean-Luc Bredas

    ADVANCED MATERIALS   29 ( 46 )   2017.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201702767

  • Enhanced Electrical Properties and Air Stability of Amorphous Organic Thin Films by Engineering Film Density Reviewed

    Yu Esaki, Takeshi Komino, Toshinori Matsushima, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   8 ( 23 )   5891 - 5897   2017.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.7b02808

  • Donor-sigma-Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion Reviewed

    Yan Geng, Anthony D'Aleo, Ko Inada, Lin-Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   56 ( 52 )   16536 - 16540   2017.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201708876

  • Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb2Br5 Films for Efficient and Stable Light-Emitting Diodes Reviewed

    Chuanjiang Qin, Toshinori Matsushima, Atula S. D. Sandanayaka, Youichi Tsuchiya, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   8 ( 21 )   5415 - 5421   2017.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.7b02371

  • Diindenoperylene (DIP) concentration dependent photovoltaic performance and dielectric properties for mixed heterojunctions Reviewed

    Yan Qiong Zheng, Chao Wang, Jun Le Yu, Fang Yang, Bin Wei, Yang Lin, Xi Feng, Chihaya Adachi

    SYNTHETIC METALS   233   35 - 40   2017.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.synthmet.2017.09.001

  • Electrogenerated Chemiluminescence of a BODIPY Derivative with Extended Conjugation Reviewed

    Ryoichi Ishimatsu, Hirosato Shintaku, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    CHEMISTRYSELECT   2 ( 32 )   10531 - 10536   2017.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/slct.201702449

  • Organic long persistent luminescence Reviewed

    Ryota Kabe, Chihaya Adachi

    Nature   550 ( 7676 )   384 - 387   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/nature24010

  • Thermally activated delayed fluorescence of Bis(9,9-dimethy1-9,10-dihydroacridine) dibenzo [b,d]thiophene 5,5-dioxide derivatives for organic light-emitting diodes Reviewed

    Jong Uk Kim, Saripally Sudhaker Reddy, Lin-Song Cui, Hiroko Nomura, Sunbin Hwang, Dae Hyeon Kim, Hajime Nakanotani, Sung-Ho Jin, Chihaya Adachi

    JOURNAL OF LUMINESCENCE   190   485 - 491   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2017.06.006

  • Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host-Guest Systems Reviewed

    Naoto Notsuka, Ryota Kabe, Kenichi Goushi, Chihaya Adachi

    Advanced Functional Materials   27 ( 40 )   1703902   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host-Guest Systems
    Long-lived triplet excitons on organic molecules easily deactivate at room temperature because of the presence of thermally activated nonradiative pathways. This study demonstrates long-lived phosphorescence at room temperature resulting from suppression of the nonradiative deactivation of triplet excitons in conventional organic semiconducting host-guest systems. The nonradiative deactivation pathway strongly depends on the triplet energy gap between the guest emitting molecules and the host matrices. The triplet energy gap required to confine the long-lived triplet excitons (approximate to 0.5 eV) is much larger than that of conventional host-guest systems for phosphorescent emitters. By effectively confining the triplet excitons, this study demonstrates long-lived room-temperature phosphorescence under optical and electrical excitation.

    DOI： 10.1002/adfm.201703902

  • Molecular Design for Blue Thermal Activated Delayed Fluorescence Materials: Substitution Position Effect Reviewed

    Yan Geng, Lin-Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

    CHEMISTRY LETTERS   46 ( 10 )   1490 - 1492   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.170587

  • Two Regimes of Carrier Diffusion in Vapor-Deposited Lead-Halide Perovskites Reviewed

    Patrik Scajev, Ramunas Aleksiejunas, Saulius Miasojedovas, Saulius Nargelas, Munetomo Inoue, Chuanjiang Qin, Toshinori Matsushima, Chihaya Adachi, Saulius Jursenas

    JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 39 )   21600 - 21609   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.7b04179

  • 熱活性型遅延蛍光（TADF)分子の配向制御と電子状態評価

    山田, 洋一, 長谷川, 友里, 細貝, 拓也, 中野谷, 一, 安達, 千波矢, Enrique, Ortega

    表面科学学術講演会要旨集   37 ( 0 )   3 - 3   2017.8

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    熱活性型遅延蛍光(TADF)は、三重項励起子を熱励起により一重項励起子に逆項間交差させることで、内部量子効率100&#37;の蛍光発光を可能にする。この分子を用いたデバイスの外部量子効率を向上させるため、配向制御により遷移双極子モーメントを揃えることで、光取出効率を向上させることが重要である。我々は、この分子の配向制御を達成し、さらに配向膜の電子状態が孤立分子と同様であることを示した。

    DOI： 10.14886/sssj2008.37.0_3

  • TADF分子膜の配向制御及び発光特性計測

    南, 颯人, 佐々木, 正洋, 山田, 洋一, 細貝, 拓也, 中野谷, 一, 安達, 千波矢, 長谷川, 友里

    表面科学学術講演会要旨集   37 ( 0 )   212 - 212   2017.8

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    熱活性遅延蛍光分子は、緻密な分子設計によって内部量子効率100&#37;を実現することが知られている。高効率の有機ELデバイス実現のためには、高い内部量子効率の維持が重要であると考える。我々は金属基板上でいくつかのTADF分子について高配向の単分子膜を形成し、STMにより構造解析を行った。また、過渡発光計測の結果、TADF分子の一種である4CzIPNは遅延蛍光の発光効率が膜厚に依存することを見出した。

    DOI： 10.14886/sssj2008.37.0_212

  • 【2017-12】Solution-processable thermally activated delayed fluorescence emitters for application in organic light emitting diodes Reviewed

    25 ( 8 )   480 - 485   2017.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/jsid.598

  • Dipole orientation analysis without optical simulation: application to thermally activated delayed fluorescence emitters doped in host matrix Reviewed

    Takeshi Komino, Yuji Oki, Chihaya Adachi

    SCIENTIFIC REPORTS   7   2017.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41598-017-08708-1

  • Near-infrared organic light-emitting diodes for biosensing with high operating stability Reviewed

    Takahiko Yamanaka, Hajime Nakanotani, Shigeo Hara, Toru Hirohata, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   10 ( 7 )   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/APEX.10.074101

  • Methylammonium Lead Bromide Perovskite Light-Emitting Diodes by Chemical Vapor Deposition Reviewed

    Matthew R. Leyden, Lingqiang Meng, Yan Jiang, Luis K. Ono, Longbin Qiu, Emilio J. Juarez-Perez, Chuanjiang Qin, Chihaya Adachi, Yabing Qi

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   8 ( 14 )   3193 - 3198   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.7b01093

  • Highly Efficient Thermally Activated Delayed Fluorescence from an Excited-State Intramolecular Proton Transfer System Reviewed

    Masashi Mamada, Ko Inada, Takeshi Komino, William J. Potscavage, Hajime Nakanotani, Chihaya Adachi

    ACS CENTRAL SCIENCE   3 ( 7 )   769 - 777   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acscentsci.7b00183

  • Boron difluoride hemicurcuminoid as an efficient far red to near-infrared emitter: toward OLEDs and laser dyes Reviewed

    A. D'Aleo, M. H. Sazzad, D. H. Kim, E. Y. Choi, J. W. Wu, G. Canard, F. Fages, J. -C. Ribierre, C. Adachi

    CHEMICAL COMMUNICATIONS   53 ( 52 )   7003 - 7006   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c7cc01786c

  • Increasing the horizontal orientation of transition dipole moments in solution processed small molecular emitters Reviewed

    Alessia Senes, Stefan C. J. Meskers, Horst Greiner, Katsuaki Suzuki, Hironori Kaji, Chihaya Adachi, Joanne S. Wilson, Rene A. J. Janssen

    JOURNAL OF MATERIALS CHEMISTRY C   5 ( 26 )   6555 - 6562   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c7tc01568b

  • THz Absorption Measurement and Calculation of Organic Thermally Activated Delayed Fluorescence Materials Reviewed

    Harunobu Takeda, Cong Chen, Takeshi Komino, Hiroaki Yoshioka, Yuji Oki, Chihaya Adachi

    2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)   Part F82-CLEO_Europe 2017   2017.6

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • Influence of the organic film thickness on the second order distributed feedback resonator properties of an organic semiconductor laser Reviewed

    F. Bencheikh, A. S. D. Sandanayaka, T. Matsushima, J. C. Ribierre, C. Adachi

    JOURNAL OF APPLIED PHYSICS   121 ( 23 )   2017.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4986504

  • Nature of the singlet and triplet excitations mediating thermally activated delayed fluorescence Reviewed International journal

    Physical Review Materials   1   075602   2017.5

    　More details

    Language：English  

    DOI： 10.1103/PhysRevMaterials.1.075602

  • Near infrared electroluminescence from Nd(TTA)(3) phen in solution-processed small molecule organic light-emitting diodes Reviewed

    Afshin Shahalizad, Anthony D'Aleo, Chantal Andraud, Muhammad Hasnan Sazzad, Dae-Hyeon Kim, Youichi Tsuchiya, Jean-Charles Ribierre, Jean-Michel Nunzi, Chihaya Adachi

    ORGANIC ELECTRONICS   44   50 - 58   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2017.01.044

  • Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence Reviewed

    Hajime Nakanotani, Taro Furukawa, Takuya Hosokai, Takuji Hatakeyama, Chihaya Adachi

    Advanced Optical Materials   5 ( 12 )   1700051 - 1700051   2017.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence

    DOI： 10.1002/adom.201700051

  • A near-infrared organic light-emitting diode based on an Yb(III) complex synthesized by vacuum co-deposition Reviewed

    Kazuya Jinnai, Ryota Kabe, Chihaya Adachi

    CHEMICAL COMMUNICATIONS   53 ( 39 )   5457 - 5460   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c7cc01580a

  • Joule heat-induced breakdown of organic thin-film devices under pulse operation Reviewed International journal

    Kou Yoshida; Toshinori Matsushima; Yu Shiihara; Hiroyuki Kuwae; Jun Mizuno; Chihaya Adachi

    J. Appl. Phys.   121   195503   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4983456

  • Evidence and mechanism of efficient thermally activated delayed fluorescence promoted by delocalized excited states Reviewed

    Takuya Hosokai, Hiroyuki Matsuzaki, Hajime Nakanotani, Katsumi Tokumaru, Tetsuo Tsutsui, Akihiro Furube, Keirou Nasu, Hiroko Nomura, Masayuki Yahiro, Chihaya Adachi

    SCIENCE ADVANCES   3 ( 5 )   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.1603282

  • Joule heat-induced breakdown of organic thin-film devices under pulse operation Reviewed International journal

    Kou Yoshida; Toshinori Matsushima; Yu Shiihara; Hiroyuki Kuwae; Jun Mizuno; Chihaya Adachi

    J. Appl. Phys.   121   195503   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4983456

  • Control of the Singlet-Triplet Energy Gap in a Thermally Activated Delayed Fluorescence Emitter by Using a Polar Host Matrix Reviewed

    Shota Haseyama, Akitsugu Niwa, Takashi Kobayashi, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    NANOSCALE RESEARCH LETTERS   12   2017.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1186/s11671-017-2012-1

  • Toward continuous-wave operation of organic semiconductor lasers Reviewed

    Atula S. D. Sandanayaka, Toshinori Matsushima, Fatima Bencheikh, Kou Yoshida, Munetomo Inoue, Takashi Fujihara, Kenichi Goushi, Jean-Charles Ribierre, Chihaya Adachi

    SCIENCE ADVANCES   3 ( 4 )   2017.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.1602570

  • Bifluorene Single Crystals with Extremely Low-Threshold Amplified Spontaneous Emission Reviewed

    Gediminas Kreiza, Paulius Baronas, Edvinas Radiunas, Povilas Adomenas, Ona Adomeniene, Karolis Kazlauskas, Jean-Charles Ribierre, Chihaya Adachi, Saulius Jursenas

    ADVANCED OPTICAL MATERIALS   5 ( 5 )   2017.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201600823

  • 【2017-3】Combined Inter- and Intramolecular Charge-Transfer Processes for Highly Efficient Fluorescent Organic Light-Emitting Diodes with Reduced Triplet Exciton Quenching Reviewed

    29 ( 17 )   [1606448-1] - [1606448-5]   2017.3

    　More details

    Language：English  

    DOI： 10.1002/adma.201606448

  • Contributions of a Higher Triplet Excited State to the Emission Properties of a Thermally Activated Delayed-Fluorescence Emitter Reviewed

    Takashi Kobayashi, Akitsugu Niwa, Kensho Takaki, Shota Haseyama, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    PHYSICAL REVIEW APPLIED   7 ( 3 )   2017.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevApplied.7.034002

  • Deep-blue light emission with a wide-bandgap naphthalene-derivative liquid organic semiconductor host Reviewed

    Naofumi Kobayashi, Hiroyuki Kuwae, Juro Oshima, Ryoichi Ishimatsu, Shuya Tashiro, Toshihiko Imato, Chihaya Adachi, Shuichi Shoji, Jun Mizuno

    ORGANIC PHOTONIC MATERIALS AND DEVICES XIX   10101   2017.2

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1117/12.2251640

  • Intrinsic carrier transport properties of solution-processed organic-inorganic perovskite films Reviewed

    Toshinori Matsushima, Sunbin Hwang, Shinobu Terakawa, Takashi Fujihara, Atula S. D. Sandanayaka, Chuanjiang Qin, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   10 ( 2 )   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/APEX.10.024103

  • Near-Infrared Electrophosphorescence up to 1.1 µm using a Thermally Activated Delayed Fluorescence Molecule as Triplet Sensitizer. Reviewed

    29 ( 5 )   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201604265

  • Controlling Singlet-Triplet Energy Splitting for Deep-Blue Thermally Activated Delayed Fluorescence Emitters Reviewed

    Lin-Song Cui, Hiroko Nomura, Yan Geng, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   56 ( 6 )   1571 - 1575   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201609459

  • Organic light emitting diodes with horizontally oriented thermally activated delayed fluorescence emitters Reviewed

    D. H. Kim, K. Inada, L. Zhao, T. Komino, N. Matsumoto, J. C. Ribierre, C. Adachi

    JOURNAL OF MATERIALS CHEMISTRY C   5 ( 5 )   1216 - 1223   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6tc04786f

  • Fabrication of high coverage MASnI(3) perovskite films for stable, planar heterojunction solar cells Reviewed

    T. Fujihara, S. Terakawa, T. Matsushima, C. Qin, M. Yahiro, C. Adachi

    JOURNAL OF MATERIALS CHEMISTRY C   5 ( 5 )   1121 - 1127   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6tc05069g

  • Current understanding of mechanism of thermally activated delayed fluorescence: RISC beyond S-T energy gap

    Takuya Hosokai, Hiroyuki Matsuzaki, Hajime Nakanotani, Chihaya Adachi

    Proceedings of the International Display Workshops   1   690 - 693   2017.1

    　More details

    Language：Others   Publishing type：Research paper (other academic)  

  • Extremely low amplified spontaneous emission threshold and blue electroluminescence from a spin-coated octafluorene neat film Reviewed

    D. -H. Kim, A. S. D. Sandanayaka, L. Zhao, D. Pitrat, J. C. Mulatier, T. Matsushima, C. Andraud, J. C. Ribierre, C. Adachi

    APPLIED PHYSICS LETTERS   110 ( 2 )   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4974045

  • Fabrication of high coverage MASnI3 perovskite films for stable, planar heterojunction solar cells Reviewed International journal

    T. Fujihara; S. Terakawa; T. Matsushima; C. Qin; M. Yahiro; C. Adachi

    J. Mater. Chem. C   5   1121 - 1127   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C6TC05069G

  • Strong luminescence behavior of mono- and dimeric imidazoquinazolines: Swift OLED degradation under electrical current Reviewed

    Rampal Pandey, Gabor Mehes, Ashish Kumar, Roop Shikha Singh, Amit Kumar, Chihaya Adachi, Daya Shankar Pandey

    JOURNAL OF LUMINESCENCE   181   252 - 260   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2016.09.026

  • Multifunctional Benzoquinone Additive for Efficient and Stable Planar Perovskite Solar Cells Reviewed

    Chuanjiang Qin, Toshinori Matsushima, Takashi Fujihara, Chihaya Adachi

    ADVANCED MATERIALS   29 ( 4 )   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201603808

  • Versatile Molecular Functionalization for Inhibiting Concentration Quenching of Thermally Activated Delayed Fluorescence Reviewed

    Jiyoung Lee, Naoya Aizawa, Masaki Numata, Chihaya Adachi, Takuma Yasuda

    ADVANCED MATERIALS   29 ( 4 )   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201604856

  • Tetrathienoanthracene-based pi-Extended Narrow-band-gap Molecules: Synthesis, Physicochemical, and Photovoltaic Properties Reviewed

    Hideaki Komiyama, Chihaya Adachi, Takuma Yasuda

    CHEMISTRY LETTERS   46 ( 1 )   29 - 31   2017.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.160858

  • Solution-Processed Organic-Inorganic Perovskite Field-Effect Transistors with High Hole Mobilities Reviewed

    Toshinori Matsushima, Sunbin Hwang, Atula S. D. Sandanayaka, Chuanjiang Qin, Shinobu Terakawa, Takashi Fujihara, Masayuki Yahiro, Chihaya Adachi

    ADVANCED MATERIALS   28 ( 46 )   10275 - 10281   2016.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201603126

  • Influence of material impurities in the hole-blocking layer on the lifetime of organic light-emitting diodes Reviewed

    Hiroshi Fujimoto, Masayuki Yahiro, Satoshi Yukiwaki, Keiko Kusuhara, Nozomi Nakamura, Takashi Suekane, Hong Wei, Katsuya Imanishi, Ko Inada, Chihaya Adachi

    APPLIED PHYSICS LETTERS   109 ( 24 )   2016.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4972055

  • Field-effect transistors with vacuum-deposited organic-inorganic perovskite films as semiconductor channels Reviewed

    Matsushima Toshinori, Yasuda Takeshi, Fujita Katsuhiko, Adachi Chihaya

    JOURNAL OF APPLIED PHYSICS   120 ( 23 )   2016.12

    　More details

    Language：Others  

    Field-effect transistors with vacuum-deposited organic-inorganic perovskite films as semiconductor channels

    DOI： 10.1063/1.4972226

  • N-channel field-effect transistors with an organic-inorganic layered perovskite semiconductor Reviewed

    Toshinori Matsushima, Fabrice Mathevet, Benoit Heinrich, Shinobu Terakawa, Takashi Fujihara, Chuanjiang Qin, Atula S. D. Sandanayaka, Jean-Charles Ribierre, Chihaya Adachi

    APPLIED PHYSICS LETTERS   109 ( 25 )   2016.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4972404

  • Influence of vacuum chamber impurities on the lifetime of organic light-emitting diodes Reviewed

    Hiroshi Fujimoto, Takashi Suekane, Katsuya Imanishi, Satoshi Yukiwaki, Hong Wei, Kaori Nagayoshi, Masayuki Yahiro, Chihaya Adachi

    SCIENTIFIC REPORTS   6   38482   2016.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep38482

  • Quasi continuous-wave lasing in organic thin-film semiconductors Reviewed

    Atula S. D. Sanadanayaka, Kou Yoshida, Jean-Charles Ribierre, Toshinori Matsushima, Chihaya Adachi

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XX   9941   2016.11

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1117/12.2237466

  • Effect of 3,4,9,10-perylenetetracarboxylic bisbenzimidazole (PTCBI) as well as bathocuproine (BCP) and Ag interlayer thickness on the performance of organic tandem solar cells Reviewed

    Yanqiong Zheng, Fang Yang, Chao Wang, Jing Zhang, William J. Potscavage, Bin Wei, Chihaya Adachi, Wenhong Pu, Changzhu Yang, Jianhua Zhang

    SYNTHETIC METALS   221   179 - 185   2016.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.synthmet.2016.09.001

  • Solution-processed organic thermoelectric materials exhibiting doping-concentration-dependent polarity Reviewed

    Sunbin Hwang, William J. Potscavage, Yu Seok Yang, In Seob Park, Toshinori Matsushima, Chihaya Adachi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   18 ( 42 )   29199 - 29207   2016.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6cp04572c

  • Application of wide-energy-gap material 3,4-di(9H-carbazol-9-yl)benzonitrile in organic light-emitting diodes Reviewed

    Yuya Tanaka, Takehiro Takahashi, Junichi Nishide, Yasuhide Hiraga, Hajime Nakanotani, Chihaya Adachi

    THIN SOLID FILMS   619   120 - 124   2016.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.tsf.2016.11.016

  • Tunable OLEDs Color Tuning of Avobenzone Boron Difluoride as an Emitter to Achieve Full-Color Emission (Adv. Funct. Mater. 37/2016) Reviewed

    Hin Wai Mo, Youichi Tsuchiya, Yan Geng, Takehiro Sagawa, Chika Kikuchi, Hajime Nakanotani, Fuyuki Ito, Chihaya Adachi

    Advanced Functional Materials   26 ( 37 )   2016.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201670245

  • 0.6-1.6 THz band spectroscopy of organic thermally activated delayed fluorescence materials Reviewed

    Harunobu Takeda, Cong Chen, Takeshi Komino, Hiroaki Yoshioka, Yuji Oki, Chihaya Adachi

    OPTICAL MATERIALS EXPRESS   6 ( 10 )   3045 - 3052   2016.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OME.6.003045

  • Quenching Behavior of Thermally Activated Delayed Fluorescence from a Donor-Acceptor Molecule, 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene by O-2 Reviewed

    Ryoichi Ishimatsu, Yuko Kirino, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    CHEMISTRY LETTERS   45 ( 10 )   1183 - 1185   2016.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.160561

  • Role of intermediate state in the excited state dynamics of highly efficient TADF molecules Reviewed

    Hosokai Takuya, Matsuzaki Hiroyuki, Furube Akihiro, Tokumaru Katsumi, Tsutsui Tetsuo, Nakanotani Hajime, Yahiro Masayuki, Adachi Chihaya

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XX   9941   2016.9

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    Role of intermediate state in the excited state dynamics of highly efficient TADF molecules
    We hereby report the results of our direct investigation into the excited-state dynamics of thermally activated delayed fluorescence (TADF) molecules in solution using pump-probe transient absorption spectroscopy (TAS). We found that the charge-transfer (CT) state commonly stated for TADF molecules encompasses two forms: localized and delocalized CT states. A highly efficient TADF molecule, 4CzIPN [Uoyama et al., Nature, 492, 234-238 (2012)], showed both the localized and delocalized CT states, while an inefficient TADF molecule, 2CzPN, exhibited only a localized CT state. By analyzing the time profile of triplet species observed in TAS, we propose that the reverse intersystem crossing (RISC) of 4CzIPN occurs via a mutual interaction in multiple energy levels of localized neutral and CT states, and delocalized CT states.

    DOI： 10.1117/12.2236248

  • Corrigendum: Benzimidazobenzothiazole-based Bipolar Hosts to Harvest Nearly All of the Excitons from Blue Delayed Fluorescence and Phosphorescent Organic Light-Emitting Diodes. Reviewed

    Cui LS, Kim JU, Nomura H, Nakanotani H, Adachi C

    Angewandte Chemie (International ed. in English)   55 ( 40 )   12136   2016.9

    　More details

    Language：Others  

    Corrigendum: Benzimidazobenzothiazole-based Bipolar Hosts to Harvest Nearly All of the Excitons from Blue Delayed Fluorescence and Phosphorescent Organic Light-Emitting Diodes.

    DOI： 10.1002/anie.201605553

  • High-coverage organic-inorganic perovskite film fabricated by double spin coating for improved solar power conversion and amplified spontaneous emission Reviewed

    Toshinori Matsushima, Munetomo Inoue, Takashi Fujihara, Shinobu Terakawa, Chuanjiang Qin, Atula S. D. Sandanayaka, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   661   131 - 135   2016.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2016.08.067

  • Controlling Synergistic Oxidation Processes for Efficient and Stable Blue Thermally Activated Delayed Fluorescence Devices Reviewed

    Lin-Song Cui, Ya-Li Deng, Daniel Ping-Kuen Tsang, Zuo-Quan Jiang, Qisheng Zhang, Liang-Sheng Liao, Chihaya Adachi

    ADVANCED MATERIALS   28 ( 35 )   7620 - +   2016.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201602127

  • Magnesium-gold binary alloy for organic light-emitting diodes with high corrosion resistance Reviewed

    Hiroya Arai, Hajime Nakanotani, Kei Morimoto, Chihaya Adachi

    Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics   34 ( 4 )   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4952408

  • Star-shaped and linear π-conjugated oligomers consisting of a tetrathienoanthracene core and multiple diketopyrrolopyrrole arms for organic solar cells. Reviewed

    12   1459 - 1466   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3762/bjoc.12.142

  • Enhanced Electroluminescence from a Thiophene-Based Insulated Molecular Wire Reviewed

    Gabor Mehes, Chengjun Pan, Fatima Bencheikh, Li Zhao, Kazunori Sugiyasu, Masayuki Takeuchi, Jean-Charles Ribierre, Chihaya Adachi

    ACS MACRO LETTERS   5 ( 7 )   781 - 785   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsmacrolett.6b00205

  • Thermally Activated Delayed Fluorescence from Pentacarbazorylbenzonitrile Reviewed

    Shuho Tanimoto, Takatsugu Suzuki, Hajime Nakanotani, Chihaya Adachi

    CHEMISTRY LETTERS   45 ( 7 )   770 - 772   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.160290

  • Microcrystallization of a Solution-Processable Organic Semiconductor in Capillaries for High-Performance Ambipolar Field Effect Transistors Reviewed

    Satoshi Watanabe, Takuma Fujita, Jean-Charles Ribierre, Kazuto Takaishi, Tsuyoshi Muto, Chihaya Adachi, Masanobu Uchiyama, Tetsuya Aoyama, Mutsuyoshi Matsumoto

    ACS APPLIED MATERIALS & INTERFACES   8 ( 27 )   17574 - 17582   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.5b12713

  • Magnesium-gold binary alloy for organic light-emitting diodes with high corrosion resistance Reviewed

    Hiroya Arai, Hajime Nakanotani, Kei Morimoto, Chihaya Adachi

    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B   34 ( 4 )   2016.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4952408

  • Blue Oleds: High-Efficiency Blue Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence from Phenoxaphosphine and Phenoxathiin Derivatives (Adv. Mater. 23/2016) Reviewed

    Sae Youn Lee, Chihaya Adachi, Takuma Yasuda

    Advanced Materials   28 ( 23 )   4625   2016.6

    　More details

    Language：English  

    DOI： 10.1002/adma.201670160

  • Electroluminescence from completely horizontally oriented dye molecules Reviewed

    Takeshi Komino, Yuta Sagara, Hiroyuki Tanaka, Yuji Oki, Nozomi Nakamura, Hiroshi Fujimoto, Chihaya Adachi

    APPLIED PHYSICS LETTERS   108 ( 24 )   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4954163

  • Quasi-Continuous-Wave Organic Thin-Film Distributed Feedback Laser Reviewed

    Atula S. D. Sandanayaka, Kou Yoshida, Munetomo Inoue, Chuanjiang Qin, Kenichi Goushi, Jean-Charles Ribierre, Toshinori Matsushima, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   4 ( 6 )   834 - 839   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201600006

  • Thermally Activated Delayed Fluorescence Polymers for Efficient Solution-Processed Organic Light-Emitting Diodes Reviewed

    Sae Youn Lee, Takuma Yasuda, Hideaki Komiyama, Jiyoung Lee, Chihaya Adachi

    ADVANCED MATERIALS   28 ( 21 )   4019 - 4024   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201505026

  • High-Efficiency Blue Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence from Phenoxaphosphine and Phenoxathiin Derivatives Reviewed

    Sae Youn Lee, Chihaya Adachi, Takuma Yasuda

    ADVANCED MATERIALS   28 ( 23 )   4626 - 4631   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201506391

  • Benzimidazobenzothiazole-Based Bipolar Hosts to Harvest Nearly All of the Excitons from Blue Delayed Fluorescence and Phosphorescent Organic Light-Emitting Diodes Reviewed

    Lin-Song Cui, Jong Uk Kim, Hiroko Nomura, Hajime Nakanotani, Chihaya Adachi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   55 ( 24 )   6864 - 6868   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201601136

  • Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers (vol 6, 22463, 2016) Reviewed

    Daniel Ping-Kuen Tsang, Toshinori Matsushima, Chihaya Adachi

    SCIENTIFIC REPORTS   6   26921   2016.5

    　More details

    Language：English  

    DOI： 10.1038/srep26921

  • Increased Vis-to-UV upconversion performance by energy level matching between a TADF donor and high triplet energy acceptors Reviewed International journal

    Nobuhiro Yanai; Mariko Kozue; Shogo Amemori; Ryota Kabe; Chihaya Adachi; Nobuo Kimizuka

    J. Mater. Chem. C   4 ( 27 )   6447 - 6451   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C6TC01816E

  • Current Enhancement in Organic Films through Gap Compression by Cold and Hot Isostatic Pressing Reviewed

    Yu Esaki, Toshinori Matsushima, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   26 ( 17 )   2940 - 2949   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201505190

  • Self-Assembly of Electron Donor-Acceptor-Based Carbazole Derivatives: Novel Fluorescent Organic Nanoprobes for Both One- and Two-Photon Cellular Imaging Reviewed

    Jinfeng Zhang, Wencheng Chen, Sergii Kalytchuk, King Fai Li, Rui Chen, Chihaya Adachi, Zhan Chen, Andrey L. Rogach, Guangyu Zhu, Peter K. N. Yu, Wenjun Zhang, Kok Wai Cheah, Xiaohong Zhang, Chun-Sing Lee

    ACS APPLIED MATERIALS & INTERFACES   8 ( 18 )   11355 - 11365   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.6b03259

  • Improvement of the quasi-continuous-wave lasing properties in organic semiconductor lasers using oxygen as triplet quencher Reviewed

    Atula S. D. Sandanayaka, Li Zhao, Delphine Pitrat, Jean-Christophe Mulatier, Toshinori Matsushima, Chantal Andraud, Ju-Hyung Kim, Jean-Charles Ribierre, Chihaya Adachi

    APPLIED PHYSICS LETTERS   108 ( 22 )   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4952970

  • Increased Vis-to-UV upconversion performance by energy level matching between a TADF donor and high triplet energy acceptors Reviewed International journal

    Nobuhiro Yanai; Mariko Kozue; Shogo Amemori; Ryota Kabe; Chihaya Adachi; Nobuo Kimizuka

    J. Mater. Chem. C   4 ( 27 )   6447 - 6451   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C6TC01816E

  • Photoluminescence in a Thermally Activated Delayed Fluorescence Emitter for Organic Light-emitting Diodes (ICAI論文特集) Reviewed International journal

    日本画像学会誌   55 ( 2 )   143 - 148   2016.4

    　More details

    Language：English  

    Thermally activated delayed fluorescence (TADF) has attracted much attention for realization of highly-efficient and low-cost organic light emitting diodes (OLEDs). OLEDs based on 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN), which is one of highly-efficient TADF emitters, have been demonstrated to exhibit external quantum efficiency more than 19&#37;. To study the decay rates from excited states of 4CzIPN, the temperature dependence of photoluminescence quantum efficiency (PLQE) has been measured in the weak photoexcitation limit in 4CzIPN-doped 1,3-bis(9-carbazolyl)benzene thin films. Characteristic features of the temperature dependence of PLQE in the weak photoexcitation limit are found, and examined by using rate equations of singlet and triplet densities.

    DOI： 10.11370/isj.55.143

  • Processing and doping of thick polymer active layers for flexible organic thermoelectric modules Reviewed

    Sunbin Hwang, William J. Potscavage, Ryosuke Nakamichi, Chihaya Adachi

    ORGANIC ELECTRONICS   31   31 - 40   2016.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2016.01.007

  • Quantification of temperature rise in unipolar organic conductors during short voltage-pulse excitation using electrical testing methods Reviewed

    Kou Yoshida, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

    ORGANIC ELECTRONICS   31   191 - 197   2016.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2016.01.033

  • Effect of Joule heating on transient current and electroluminescence in p-i-n organic light-emitting diodes under pulsed voltage operation Reviewed

    Kou Yoshida, Hajime Nakanotani, Chihaya Adachi

    ORGANIC ELECTRONICS   31   287 - 294   2016.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2016.01.039

  • Silicon based near infrared photodetector using self-assembled organic crystalline nano-pillars Reviewed

    Yoshiharu Ajiki, Tetsuo Kan, Masayuki Yahiro, Akiko Hamada, Junji Adachi, Chihaya Adachi, Kiyoshi Matsumoto, Isao Shimoyama

    APPLIED PHYSICS LETTERS   108 ( 15 )   2016.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4945690

  • A Phenazaborin-Based High-Efficiency Blue Delayed Fluorescence Material Reviewed

    In Seob Park, Masaki Numata, Chihaya Adachi, Takuma Yasuda

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   89 ( 3 )   375 - 377   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.20150399

  • Low amplified spontaneous emission threshold and suppression of electroluminescence efficiency roll-off in layers doped with ter(9,9 '-spirobifluorene) Reviewed

    Munetomo Inoue, Toshinori Matsushima, Chihaya Adachi

    APPLIED PHYSICS LETTERS   108 ( 13 )   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4945596

  • Full-Color Delayed Fluorescence Materials Based on Wedge-Shaped Phthalonitriles and Dicyanopyrazines: Systematic Design, Tunable Photophysical Properties, and OLED Performance Reviewed

    In Seob Park, Sae Youn Lee, Chihaya Adachi, Takuma Yasuda

    ADVANCED FUNCTIONAL MATERIALS   26 ( 11 )   1813 - 1821   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201505106

  • Photophysical Properties and Efficient, Stable, Electrogenerated Chemiluminescence of Donor-Acceptor Molecules Exhibiting Thermal Spin Upconversion Reviewed

    Ryoichi Ishimatsu, Tomohiko Edura, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    CHEMISTRY-A EUROPEAN JOURNAL   22 ( 14 )   4889 - 4898   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/chem.201600077

  • Operational stability enhancement in organic light-emitting diodes with ultrathin Liq interlayers Reviewed

    Daniel Ping-Kuen Tsang, Chihaya Adachi

    SCIENTIFIC REPORTS   6   22463   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep22463

  • 【2016-2】Highly efficient solution-processed host-free organic light-emitting diodes showing an external quantum efficiency of nearly 18&#37; with a thermally activated delayed fluorescence emitter Reviewed

    9 ( 3 )   [032102-1] - [032102-3]   2016.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/APEX.9.032102

  • Long-range coupling of electron-hole pairs in spatially separated organic donor-acceptor layers Reviewed

    Hajime Nakanotani, Taro Furukawa, Kei Morimoto, Chihaya Adachi

    SCIENCE ADVANCES   2 ( 2 )   e1501470   2016.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.1501470

  • Seamless growth of a supramolecular carpet Reviewed

    Ju-Hyung Kim, Jean-Charles Ribierre, Yu Seok Yang, Chihaya Adachi, Maki Kawai, Jaehoon Jung, Takanori Fukushima, Yousoo Kim

    NATURE COMMUNICATIONS   7   10653   2016.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/ncomms10653

  • Organic nanostructures of thermally activated delayed fluorescent emitters with enhanced intersystem crossing as novel metal-free photosensitizers Reviewed

    Jinfeng Zhang, Wencheng Chen, Rui Chen, Xiao Ke Liu, Yuan Xiong, Stephen V. Kershaw, Andrey L. Rogach, Chihaya Adachi, Xiaohong Zhang, Chun Sing Lee

    Chemical Communications   52 ( 79 )   11744 - 11747   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6cc05130h

  • Enhanced organic solar cells efficiency through electronic and electro-optic effects resulting from charge transfers in polymer hole transport blends Reviewed

    Journal of Materials Chemistry A   4 ( 11 )   4252 - 4263   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6ta00677a

  • Horizontal molecular orientation of light-emitting oligofluorenes in spin-coated glassy organic thin films Reviewed

    Li Zhao, Takeshi Komino, Dae Hyeon Kim, Muhammad Hasnan Sazzad, Delphine Pitrat, Jean Christophe Mulatier, Chantal Andraud, Jean Charles Ribierre, Chihaya Adachi

    Journal of Materials Chemistry C   4 ( 48 )   11557 - 11565   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6tc02861f

  • Effect of reverse intersystem crossing rate to suppress efficiency roll-off in organic light-emitting diodes with thermally activated delayed fluorescence emitters Reviewed

    Munetomo Inoue, Tomas Serevicius, Hajime Nakanotani, Kou Yoshida, Toshinori Matsushima, Saulius Jursenas, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   644   62 - 67   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2015.11.042

  • Singlet-Triplet Exciton Annihilation Nearly Suppressed in Organic Semiconductor Laser Materials Using Oxygen as a Triplet Quencher Reviewed

    Li Zhao, Munetomo Inoue, Kou Yoshida, Atula S. D. Sandanayaka, Ju-Hyung Kim, Jean-Charles Ribierre, Chihaya Adachi

    IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS   22 ( 1 )   34   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/JSTQE.2015.2473138

  • Afterglow Organic Light-Emitting Diode Reviewed

    Ryota Kabe, Naoto Notsuka, Kou Yoshida, Chihaya Adachi

    ADVANCED MATERIALS   28 ( 4 )   655 - 660   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201504321

  • Degradation Mechanisms of Solution-Processed Planar Perovskite Solar Cells: Thermally Stimulated Current Measurement for Analysis of Carrier Traps Reviewed

    Chuanjiang Qin, Toshinori Matsushima, Takashi Fujihara, William J. Potscavage, Chihaya Adachi

    ADVANCED MATERIALS   28 ( 3 )   466 - 471   2016.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201502610

  • Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 &#37;

    127 ( 50 )   15446 - 15450   2015.12

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ange.201508270

  • Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 . Reviewed

    54 ( 50 )   15231 - 15235   2015.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201508270

  • Highly Stable Near-Infrared Fluorescent Organic Nanoparticles with a Large Stokes Shift for Noninvasive Long-Term Cellular Imaging Reviewed

    Jinfeng Zhang, Rui Chen, Zelin Zhu, Chihaya Adachi, Xiaohong Zhang, Chun-Sing Lee

    ACS APPLIED MATERIALS & INTERFACES   7 ( 47 )   26266 - 26274   2015.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsami.5b08539

  • Highly efficient electroluminescence from a solution-processable thermally activated delayed fluorescence emitter Reviewed

    Yoshimasa Wada, Katsuyuki Shizu, Shosei Kubo, Katsuaki Suzuki, Hiroyuki Tanaka, Chihaya Adachi, Hironori Kaji

    APPLIED PHYSICS LETTERS   107 ( 18 )   2015.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4935237

  • Highly Efficient Blue Electroluminescence Using Delayed-Fluorescence Emitters with Large Overlap Density between Luminescent and Ground States Reviewed

    Katsuyuki Shizu, Hiroki Noda, Hiroyuki Tanaka, Masatsugu Taneda, Motoyuki Uejima, Tohru Sato, Kazuyoshi Tanaka, Hironori Kaji, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 47 )   26283 - 26289   2015.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.5b07798

  • Degradation mechanism of planar perovskite solar cells Reviewed

    Chuanjiang Qin, Toshinori Matsushima, Chihaya Adachi

    ORGANIC PHOTOVOLTAICS XVI   9567   2015.10

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1117/12.2187578

  • High-Efficiency Sky-Blue Organic Light-Emitting Diodes Utilizing Thermally-Activated Delayed Fluorescence Reviewed

    Yasuhide Hiraga, Jun-ichi Nishide, Hajime Nakanotani, Masaki Aonuma, Chihaya Adachi

    IEICE TRANSACTIONS ON ELECTRONICS   E98C ( 10 )   971 - 976   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1587/transele.E98.C.971

  • Light Amplification in an Organic Solid-State Film with the Aid of Triplet-to-Singlet Upconversion Reviewed

    Hajime Nakanotani, Taro Furukawa, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   3 ( 10 )   1381 - 1388   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201500236

  • Influence of deposition substrate temperature on the morphology and molecular orientation of chloroaluminum phthalocyanine films as well the performance of organic photovoltaic cells Reviewed

    Yan-Qiong Zheng, Jing Zhang, Fang Yang, Takeshi Komino, Bin Wei, Jianhua Zhang, Zixing Wang, Wenhong Pu, Changzhu Yang, Chihaya Adachi

    NANOTECHNOLOGY   26 ( 40 )   405202   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/0957-4484/26/40/405202

  • Suppression of external quantum efficiency roll-off of nanopatterned organic-light emitting diodes at high current densities Reviewed

    Hiroyuki Kuwae, Atsushi Nitta, Kou Yoshida, Takashi Kasahara, Toshinori Matsushima, Munetomo Inoue, Shuichi Shoji, Jun Mizuno, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   118 ( 15 )   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4932139

  • Purely organic electroluminescent material realizing 100&#37; conversion from electricity to light Reviewed

    Hironori Kaji, Hajime Suzuki, Tatsuya Fukushima, Katsuyuki Shizu, Katsuaki Suzuki, Shosei Kubo, Takeshi Komino, Hajime Oiwa, Furitsu Suzuki, Atsushi Wakamiya, Yasujiro Murata, Chihaya Adachi

    NATURE COMMUNICATIONS   6   8476   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/ncomms9476

  • Degradation Mechanisms of Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence Molecules Reviewed

    Atula S. D. Sandanayaka, Toshinori Matsushima, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 42 )   23845 - 23851   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.5b07084

  • Organic Light-Emitting Diodes: Multiscale Charge Transport Simulation and Fabrication of New Thermally Activated Delayed Fluorescence (TADF) Materials Reviewed

    Hironori Kaji, Katsuyuki Shizu, Furitsu Suzuki, Tatsuya Fukushima, Katsuaki Suzuki, Chihaya Adachi

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XIX   9566   2015.9

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1117/12.2189078

  • Organic light-emitting diodes (OLEDs): Materials, photophysics, and device physics Reviewed

    Chihaya Adachi, Saeyoun Lee, Tetsuya Nakagawa, Katsuyuki Shizu, Kenichi Goushi, Takuma Yasuda, William J. Potscavage

    Organic Electronics Materials and Devices   43 - 73   2015.9

    　More details

    Language：English  

    DOI： 10.1007/978-4-431-55654-1_2

  • Vacuum-and-solvent-free fabrication of organic semiconductor layers for field-effect transistors Reviewed

    Toshinori Matsushima, Atula S. D. Sandanayaka, Yu Esaki, Chihaya Adachi

    SCIENTIFIC REPORTS   5   14547   2015.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep14547

  • Organic Light-emitting Diodes Based on Donor-substituted Phthalimide and Maleimide Fluorophores Reviewed

    Myung Eun Jang, Takuma Yasuda, Jiyoung Lee, Sae Youn Lee, Chihaya Adachi

    CHEMISTRY LETTERS   44 ( 9 )   1248 - 1250   2015.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.150454

  • Improvement in the light outcoupling efficiency of organic light-emitting diodes using a hemispherical lens and a multipatterned one-dimensional photonic crystal fabricated by autocloning Reviewed

    Hiroshi Fujimoto, Masayuki Yahiro, Takayuki Kawashima, Keisuke Konno, Qiang Chen, Kunio Sawaya, Shojiro Kawakami, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   8 ( 8 )   2015.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/APEX.8.082102

  • Material degradation of liquid organic semiconductors analyzed by nuclear magnetic resonance spectroscopy Reviewed

    Tatsuya Fukushima, Junichi Yamamoto, Masashi Fukuchi, Shuzo Hirata, Heo Hyo Jung, Osamu Hirata, Yuki Shibano, Chihaya Adachi, Hironori Kaji

    AIP ADVANCES   5 ( 8 )   2015.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4928515

  • Morphological control of organic-inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells Reviewed

    Toshinori Matsushima, Takashi Fujihara, Chuanjiang Qin, Shinobu Terakawa, Yu Esaki, Sunbin Hwang, Atula S.D. Sandanayaka, William J. Potscavage, Chihaya Adachi

    Journal of Materials Chemistry A   3 ( 34 )   17780 - 17787   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c5ta03796d

  • Comparison of transient state and steady state exciton-exciton annihilation rates based on Forster-type energy transfer Reviewed

    Toshiya Yonehara, Kenichi Goushi, Tomoaki Sawabe, Isao Takasu, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   54 ( 7 )   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/JJAP.54.071601

  • Uniform Aerosol Jet printed polymer lines with 30 mu m width for 140 ppi resolution RGB organic light emitting diodes Reviewed

    Jeffrey G. Tait, Ewelina Witkowska, Masaya Hirade, Tung-Huei Ke, Pawel E. Malinowski, Soeren Steudel, Chihaya Adachi, Paul Heremans

    ORGANIC ELECTRONICS   22   40 - 43   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2015.03.034

  • Tetraphenyldibenzoperiflanthene as sensitizer for enhancing the performance in dinaphthothienothiophene-based photovoltaics with and without fullerene Reviewed

    Yan-qiong Zheng, William J. Potscavage, Jing Zhang, Takuma Yasuda, Bin Wei, Chihaya Adachi

    SYNTHETIC METALS   205   121 - 126   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.synthmet.2015.04.002

  • Highly efficient electroluminescence from purely organic donor-acceptor systems Reviewed

    Katsuyuki Shizu, Jiyoung Lee, Hiroyuki Tanaka, Hiroko Nomura, Takuma Yasuda, Hironori Kaji, Chihaya Adachi

    PURE AND APPLIED CHEMISTRY   87 ( 7 )   627 - 638   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1515/pac-2015-0301

  • Morphological control of organic-inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells Reviewed International journal

    Toshinori Matsushima; Takashi Fujihara; Chuanjiang Qin; Shinobu Terakawa; Yu Esaki; Sunbin Hwang; Atula S. D. Sandanayaka; William J. Potscavage, Jr.; Chihaya Adachi

    J. Mater. Chem. A   3   17780 - 17787   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C5TA03796D

  • Fabrication of a Portable Electrochemiluminescence-induced Fluorescence Detection Chip with Microfluidic Excitation Source for Point-of-care Diagnostics Reviewed International journal

    Miho Tsuwaki, Takashi Kasahara, Tomohiko Edura, Juro Oshima, Eri Kunisawa, Ryoichi Ishimatsu, Shigeyuki Matsunami, Toshihiko Imato, Chihaya Adachi, Shuichi Shoji, Jun Mizuno

    IEEJ Transactions on Sensors and Micromachines   135 ( 6 )   230 - 235   2015.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejsmas.135.230

  • Large-Area Deposition Technology of High Purity Organic Thin Film by Gas Flow Deposition Reviewed International journal

    Tomohiko EDURA, Kohei TSUGITA, Chihaya ADACHI

    Journal of the Vacuum Society of Japan   58 ( 3 )   79 - 85   2015.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3131/jvsj2.58.79

  • High efficiency pure blue thermally activated delayed fluorescence molecules having 10H-phenoxaborin and acridan units Reviewed International journal

    Masaki Numata; Takuma Yasuda; Chihaya Adachi

    Chem. Comm.   51 ( 46 )   9443 - 9446   2015.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C5CC00307E

  • Laser-Induced Micro-Patterning of Organic Semiconductor Layers for Use in Organic Light-Emitting Diode Displays Reviewed

    Masahiro Misaki, Asami Toba, Daisuke Goto, Chihaya Adachi, Yasuko Koshiba, Kenji Ishida, Yasukiyo Ueda

    ITE Transactions on Media Technology and Applications (MTA)   3 ( 2 )   143 - 148   2015.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Laser-Induced Micro-Patterning of Organic Semiconductor Layers for Use in Organic Light-Emitting Diode Displays

  • Exciton Quenching Behavior of Thermally Activated Delayed Fluorescence Molecules by Charge Carriers Reviewed

    Atula S. D. Sandanayaka, Kou Yoshida, Toshinori Matsushima, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 14 )   7631 - 7636   2015.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.5b01314

  • Highly efficient blue electroluminescence based on thermally activated delayed fluorescence Reviewed

    Shuzo Hirata, Yumi Sakai, Kensuke Masui, Hiroyuki Tanaka, Sae Youn Lee, Hiroko Nomura, Nozomi Nakamura, Mao Yasumatsu, Hajime Nakanotani, Qisheng Zhang, Katsuyuki Shizu, Hiroshi Miyazaki, Chihaya Adachi

    NATURE MATERIALS   14 ( 3 )   330 - 336   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/NMAT4154

  • Fluorometric flow-immunoassay for alkylphenol polyethoxylates on a microchip containing a fluorescence detector comprised of an organic light emitting diode and an organic photodiode Reviewed

    Rong Liu, Ryoichi Ishimatsu, Masayuki Yahiro, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    TALANTA   134   37 - 47   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.talanta.2014.10.055

  • Influence of the atmosphere on organic-organic interfacial layers and deterioration in organic light-emitting diodes Reviewed

    Hirofumi Nakamura, Seong-Hee Noh, Miki Kuribayashi, Chihaya Adachi

    JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY   23 ( 3 )   129 - 137   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/jsid.318

  • Highly efficient blue electroluminescence based on thermally activated delayed fluorescence Reviewed

    Shuzo Hirata, Yumi Sakai, Kensuke Masui, Hiroyuki Tanaka, Sae Youn Lee, Hiroko Nomura, Nozomi Nakamura, Mao Yasumatsu, Hajime Nakanotani, Qisheng Zhang, Katsuyuki Shizu, Hiroshi Miyazaki, Chihaya Adachi

    NATURE MATERIALS   14 ( 3 )   330 - 336   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/NMAT4154

  • Nearly 100&#37; Internal Quantum Efficiency in Undoped Electroluminescent Devices Employing Pure Organic Emitters Reviewed

    Qisheng Zhang, Daniel Tsang, Hirokazu Kuwabara, Yasuhiro Hatae, Bo Li, Takehiro Takahashi, Sae Youn Lee, Takuma Yasuda, Chihaya Adachi

    ADVANCED MATERIALS   27 ( 12 )   2096 - 2100   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201405474

  • High-Efficiency White Organic Light-Emitting Diodes Based on a Blue Thermally Activated Delayed Fluorescent Emitter Combined with Green and Red Fluorescent Emitters Reviewed

    Takahiro Higuchi, Hajime Nakanotani, Chihaya Adachi

    ADVANCED MATERIALS   27 ( 12 )   2019 - 2023   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201404967

  • Introduction of oxygen into organic thin films with the aim of suppressing singlet-triplet annihilation Reviewed

    Munetomo Inoue, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   624   43 - 46   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2015.02.010

  • Suppression of roll-off characteristics of organic light-emitting diodes by narrowing current injection/transport area to 50 nm Reviewed

    Kyohei Hayashi, Hajime Nakanotani, Munetomo Inoue, Kou Yoshida, Oleksandr Mikhnenko, Thuc-Quyen Nguyen, Chihaya Adachi

    APPLIED PHYSICS LETTERS   106 ( 9 )   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4913461

  • Highly Efficient Thermally Activated Delayed Fluorescence Emitters with a Small Singlet-Triplet Energy Gap and Large Oscillator Strength Reviewed

    Yuta Sagara, Katsuyuki Shizu, Hiroyuki Tanaka, Hiroshi Miyazaki, Kenichi Goushi, Hironori Kaji, Chihaya Adachi

    CHEMISTRY LETTERS   44 ( 3 )   360 - 362   2015.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.141054

  • Charge carrier dynamics and degradation phenomena in organic light-emitting diodes doped by a thermally activated delayed fluorescence emitter Reviewed

    Yutaka Noguchi, Hyung-Jun Kim, Ryuta Ishino, Kenichi Goushi, Chihaya Adachi, Yasuo Nakayama, Hisao Ishii

    ORGANIC ELECTRONICS   17   184 - 191   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.12.009

  • Ambipolar organic field-effect transistors based on solution-processed single crystal microwires of a quinoidal oligothiophene derivative Reviewed International journal

    Chem. Comm.   51 ( 27 )   5836 - 5839   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4CC09608H

  • Charge carrier dynamics and degradation phenomena in organic light-emitting diodes doped by a thermally activated delayed fluorescence emitter Reviewed

    Yutaka Noguchi, Hyung-Jun Kim, Ryuta Ishino, Kenichi Goushi, Chihaya Adachi, Yasuo Nakayama, Hisao Ishii

    ORGANIC ELECTRONICS   17   184 - 191   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.12.009

  • Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs Reviewed

    Taro Furukawa, Hajime Nakanotani, Munetomo Inoue, Chihaya Adachi

    SCIENTIFIC REPORTS   5   8429   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep08429

  • Horizontal molecular orientation in solution-processed organic light-emitting diodes Reviewed

    L. Zhao, T. Komino, M. Inoue, J. -H. Kim, J. C. Ribierre, C. Adachi

    APPLIED PHYSICS LETTERS   106 ( 6 )   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4907890

  • Multi-color microfluidic organic light-emitting diodes based on on-demand emitting layers of pyrene-based liquid organic semiconductors with fluorescent guest dopants Reviewed

    Takashi Kasahara, Shigeyuki Matsunami, Tomohiko Edura, Ryoichi Ishimatsu, Juro Oshima, Miho Tsuwaki, Toshihiko Imato, Shuichi Shoji, Chihaya Adachi, Jun Mizuno

    SENSORS AND ACTUATORS B-CHEMICAL   207   481 - 489   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.snb.2014.09.101

  • Tunable and flexible solvent-free liquid organic distributed feedback lasers Reviewed

    Ju-Hyung Kim, Munetomo Inoue, Li Zhao, Takeshi Komino, Soonmin Seo, Jean-Charles Ribierre, Chihaya Adachi

    APPLIED PHYSICS LETTERS   106 ( 5 )   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4907323

  • Effect of Atom Substitution in Chalcogenodiazole-Containing Thermally Activated Delayed Fluorescence Emitters on Radiationless Transition Reviewed

    Hiroyuki Tanaka, Katsuyuld Shizu, Jiyoung Lee, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 6 )   2948 - 2955   2015.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp510751n

  • Phosphorescent Cu(I) complexes based on bis(pyrazol-1-yl-methyl)-pyridine derivatives for organic light-emitting diodes Reviewed

    Fengshou Wu, Jie Li, Hongbo Tong, Zaoying Li, Chihaya Adachi, Adam Langlois, Pierre D. Harvey, Li Liu, Wai-Yeung Wong, Wai-Kwok Wong, Xunjin Zhu

    JOURNAL OF MATERIALS CHEMISTRY C   3 ( 1 )   138 - 146   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c4tc01885k

  • Photometric flow injection determination of phosphate on a PDMS microchip using an optical detection system assembled with an organic light emitting diode and an organic photodiode Reviewed

    Rong Liu, Ryoichi Ishimatsu, Masayuki Yahiro, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    TALANTA   132   96 - 105   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.talanta.2014.08.057

  • Enhanced Electroluminescence from a Thermally Activated Delayed-Fluorescence Emitter by Suppressing Nonradiative Decay Reviewed

    Katsuyuki Shizu, Motoyuki Uejima, Hiroko Nomura, Tohru Sato, Kazuyoshi Tanaka, Hironori Kaji, Chihaya Adachi

    PHYSICAL REVIEW APPLIED   3 ( 1 )   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevApplied.3.014001

  • Strategy for Designing Electron Donors for Thermally Activated Delayed Fluorescence Emitters Reviewed

    Katsuyuki Shizu, Hiroyuki Tanaka, Motoyuki Uejima, Tohru Sato, Kazuyoshi Tanaka, Hironori Kaji, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 3 )   1291 - 1297   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp511061t

  • X-shaped benzoylbenzophenone derivatives with crossed donors and acceptors for highly efficient thermally activated delayed fluorescence Reviewed International journal

    Sae Youn Lee; Takuma Yasuda; In Seob Park; Chihaya Adachi

    Dalton Transactions   44   8356 - 8359   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4DT03608E

  • Zinc complexes exhibiting highly efficient thermally activated delayed fluorescence and their application to organic light-emitting diodes Reviewed International journal

    Yumi Sakai; Yuta Sagara; Hiroko Nomura; Nozomi Nakamura; Yoshitake Suzuki; Hiroshi Miyazaki; Chihaya Adachi

    Chem. Comm.   51   3181 - 3184   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4CC09403D

  • Controlled emission color and singlet-triplet energy gap of dihydrophenazine-based thermally activated delayed fluorescence emitters Reviewed International journal

    Jiyoung Lee; Katsuyuki Shizu; Hiroyuki Tanaka; Hajime Nakanotani; Takuma Yasuda; Hironori Kaji; Chihaya Adachi

    J. Mater. Chem. C   3   2175 - 2181   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4TC02530J

  • Photometric flow injection determination of phosphate on a PDMS microchip using an optical detection system assembled with an organic light emitting diode and an organic photodiode Reviewed International journal

    Rong Liu; Ryoichi Ishimatsu; Masayuki Yahiro; Chihaya Adachi; Koji Nakano; Toshihiko Imato

    Talanta   134   37 - 47   2015.1

    　More details

    Language：English  

    DOI： 10.1016/j.talanta.2014.10.055

  • Enhanced Electroluminescence from a Thermally Activated Delayed-Fluorescence Emitter by Suppressing Nonradiative Decay Reviewed

    Katsuyuki Shizu, Motoyuki Uejima, Hiroko Nomura, Tohru Sato, Kazuyoshi Tanaka, Hironori Kaji, Chihaya Adachi

    PHYSICAL REVIEW APPLIED   3 ( 1 )   2015.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevApplied.3.014001

  • Anthraquinone-Based Intramolecular Charge-Transfer Compounds: Computational Molecular Design, Thermally Activated Delayed Fluorescence, and Highly Efficient Red Electroluminescence Reviewed

    Qisheng Zhang, Hirokazu Kuwabara, William J. Potscavage, Shuping Huang, Yasuhiro Hatae, Takumi Shibata, Chihaya Adachi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   136 ( 52 )   18070 - 18081   2014.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja510144h

  • Solution-Processable Host Material of 1,3-Bis{3-[3-(9-carbazolyl)phenyl]-9-carbazolyl}benzene and its Application in Organic Light-Emitting Diodes Employing Thermally Activated Delayed Fluorescence Reviewed International journal

    Yoshitake Suzuki; Qisheng Zhang; Chihaya Adachi

    J. Mater. Chem. C   3   1700 - 1706   2014.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4TC02211D

  • Enhancement of the electrical characteristics of metal-free phthalocyanine films using cold isostatic pressing Reviewed

    Toshinori Matsushima, Yu Esaki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   105 ( 24 )   2014.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4904463

  • Origin of external quantum efficiency degradation in organic light-emitting diodes with a DC magnetron sputtered cathode Reviewed

    Hiroshi Fujimoto, Takuya Miyayama, Noriaki Sanada, Chihaya Adachi

    Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics   32 ( 6 )   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4897920

  • Exfoliation of Graphite into Graphene in Polar Solvents Mediated by Amphiphilic Hexa-peri-hexabenzocoronene Reviewed

    Ryota Kabe, Xinliang Feng, Chihaya Adachi, Klaus Muellen

    CHEMISTRY-AN ASIAN JOURNAL   9 ( 11 )   3125 - 3129   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/asia.201402535

  • Improved organic thin-film transistor characteristics using an elevated-electrode structure Reviewed

    Seung Kyum Kim, Chang-Hoon Shim, Tomohiko Edura, Chihaya Adachi, Reiji Hattori

    JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 11 )   111601   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/JJAP.53.111601

  • Origin of external quantum efficiency degradation in organic light-emitting diodes with a DC magnetron sputtered cathode Reviewed

    Hiroshi Fujimoto, Takuya Miyayama, Noriaki Sanada, Chihaya Adachi

    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B   32 ( 6 )   60603   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4897920

  • Different orientation of the transition dipole moments of two similar Pt(II) complexes and their potential for high efficiency organic light-emitting diodes Reviewed

    Christian Mayr, Masatsugu Taneda, Chihaya Adachi, Wolfgang Bruetting

    ORGANIC ELECTRONICS   15 ( 11 )   3031 - 3037   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.07.042

  • Analysis of electron traps formed in organic films with a sputtered cathode Reviewed

    Hiroshi Fujimoto, William J. Potscavage, Tomohiko Edura, Chihaya Adachi

    ORGANIC ELECTRONICS   15 ( 11 )   2783 - 2791   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.08.021

  • Large reverse saturable absorption under weak continuous incoherent light Reviewed

    Shuzo Hirata, Kenro Totani, Takashi Yamashita, Chihaya Adachi, Martin Vacha

    NATURE MATERIALS   13 ( 10 )   938 - 946   2014.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/NMAT4081

  • Influence of host matrix on thermally-activated delayed fluorescence: Effects on emission lifetime, photoluminescence quantum yield, and device performance Reviewed

    Gabor Mehes, Kenichi Goushi, William J. Potscavage, Chihaya Adachi

    ORGANIC ELECTRONICS   15 ( 9 )   2027 - 2037   2014.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.05.027

  • Introduction of F-4-TCNQ/MoO3 layers for thermoelectric devices based on pentacene Reviewed

    Wu Shuang-Hong, Ryosuke Nakamichi, Masatsugu Taneda, Zhang Qi-Sheng, Chihaya Adachi

    CHINESE PHYSICS B   23 ( 9 )   98502   2014.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1674-1056/23/9/098502

  • Fabrication and characterization of large-area flexible microfluidic organic light-emitting diode with liquid organic semiconductor Reviewed

    Miho Tsuwaki, Takashi Kasahara, Tomohiko Edura, Shigeyuki Matsunami, Juro Oshima, Shuichi Shoji, Chihaya Adachi, Jun Mizuno

    SENSORS AND ACTUATORS A-PHYSICAL   216   231 - 236   2014.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.sna.2014.05.032

  • Efficiency Enhancement of Organic Light-Emitting Diodes Incorporating a Highly Oriented Thermally Activated Delayed Fluorescence Emitter Reviewed

    Christian Mayr, Sae Youn Lee, Tobias D. Schmidt, Takuma Yasuda, Chihaya Adachi, Wolfgang Bruetting

    ADVANCED FUNCTIONAL MATERIALS   24 ( 33 )   5232 - 5239   2014.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201400495

  • Analysis of alternating current driven electroluminescence in organic light emitting diodes: A comparative study Reviewed

    Le Zhang, Hajime Nakanotani, Kou Yoshida, Chihaya Adachi

    ORGANIC ELECTRONICS   15 ( 8 )   1815 - 1821   2014.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.05.009

  • Multi-color microfluidic electrochemiluminescence cells Reviewed

    Takashi Kasahara, Shigeyuki Matsunami, Tomohiko Edura, Ryoichi Ishimatsu, Juro Oshima, Miho Tsuwaki, Toshihiko Imato, Shuichi Shoji, Chihaya Adachi, Jun Mizuno

    SENSORS AND ACTUATORS A-PHYSICAL   214   225 - 229   2014.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.sna.2014.04.039

  • Thermally activated delayed fluorescence from (3)n pi* to (1)n pi* up-conversion and its application to organic light-emitting diodes Reviewed

    Jie Li, Qisheng Zhang, Hiroko Nomura, Hiroshi Miyazaki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   105 ( 1 )   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4887346

  • Electrogenerated Chemiluminescence of Donor-Acceptor Molecules with Thermally Activated Delayed Fluorescence Reviewed

    Ryoichi Ishimatsu, Shigeyuki Matsunami, Takashi Kasahara, Jun Mizuno, Tomohiko Edura, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   53 ( 27 )   6993 - 6996   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201402615

  • Thermally Activated Delayed Fluorescence from a Spiro-diazafluorene Derivative Reviewed

    Hiroshi Ohkuma, Tetsuya Nakagawa, Katsuyuki Shizu, Takuma Yasuda, Chihaya Adachi

    CHEMISTRY LETTERS   43 ( 7 )   1017 - 1019   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.140360

  • Dual Intramolecular Charge-Transfer Fluorescence Derived from a Phenothiazine-Triphenyltriazine Derivative Reviewed

    Hiroyuki Tanaka, Katsuyuki Shizu, Hajime Nakanotani, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   118 ( 29 )   15985 - 15994   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp501017f

  • Fabrication of high-efficiency multilayered organic light-emitting diodes by a film transfer method Reviewed

    Kenji Kawano, Kaori Nagayoshi, Takeyuki Yamaki, Chihaya Adachi

    ORGANIC ELECTRONICS   15 ( 7 )   1695 - 1701   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.04.035

  • Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full-Color Delayed Fluorescence OLEDs Reviewed

    Sae Youn Lee, Takuma Yasuda, Yu Seok Yang, Qisheng Zhang, Chihaya Adachi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   53 ( 25 )   6402 - 6406   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201402992

  • Fabrication of a Flexible Bismuth Telluride Power Generation Module Using Microporous Polyimide Films as Substrates Reviewed

    Kunihisa Kato, Yoshika Hatasako, Makoto Kashiwagi, Harutoshi Hagino, Chihaya Adachi, Koji Miyazaki

    JOURNAL OF ELECTRONIC MATERIALS   43 ( 6 )   1733 - 1739   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s11664-013-2852-0

  • Third-generation organic electroluminescence materials Reviewed

    Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 6 )   2014.6

    　More details

    Language：English  

    DOI： 10.7567/JJAP.53.060101

  • High-efficiency white organic light-emitting diodes using thermally activated delayed fluorescence Reviewed

    Jun-ichi Nishide, Hajime Nakanotani, Yasuhide Hiraga, Chihaya Adachi

    APPLIED PHYSICS LETTERS   104 ( 23 )   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4882456

  • Selectively Controlled Orientational Order in Linear-Shaped Thermally Activated Delayed Fluorescent Dopants Reviewed

    Takeshi Komino, Hiroyuki Tanaka, Chihaya Adachi

    CHEMISTRY OF MATERIALS   26 ( 12 )   3665 - 3671   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/cm500802p

  • Donor-acceptor-structured 1,4-diazatriphenylene derivatives exhibiting thermally activated delayed fluorescence: design and synthesis, photophysical properties and OLED characteristics Reviewed

    Takehiro Takahashi, Katsuyuki Shizu, Takuma Yasuda, Kazunori Togashi, Chihaya Adachi

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   15 ( 3 )   34202   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1468-6996/15/3/034202

  • Accurate measurement of dopant concentration in organic light-emitting diodes by combining high-performance liquid chromatography and TOF-SIMS Reviewed

    Hiroshi Fujimoto, Tomohiko Edura, Takuya Miyayama, Noriaki Sanada, Chihaya Adachi

    Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics   32 ( 3 )   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4871756

  • Accurate measurement of dopant concentration in organic light-emitting diodes by combining high-performance liquid chromatography and TOF-SIMS Reviewed

    Hiroshi Fujimoto, Tomohiko Edura, Takuya Miyayama, Noriaki Sanada, Chihaya Adachi

    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B   32 ( 3 )   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1116/1.4871756

  • Structural and mechanistic insights into an Fe3+-triggered quinazoline based molecular rotor Reviewed International journal

    Chem. Comm.   50   8032 - 8035   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4CC01917B

  • Temperature dependence of photoluminescence properties in a thermally activated delayed fluorescence emitter Reviewed

    Akitsugu Niwa, Takashi Kobayashi, Takashi Nagase, Kenichi Goushi, Chihaya Adachi, Hiroyoshi Naito

    APPLIED PHYSICS LETTERS   104 ( 21 )   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4878397

  • High-efficiency organic light-emitting diodes with fluorescent emitters Reviewed

    Hajime Nakanotani, Takahiro Higuchi, Taro Furukawa, Kensuke Masui, Kei Morimoto, Masaki Numata, Hiroyuki Tanaka, Yuta Sagara, Takuma Yasuda, Chihaya Adachi

    NATURE COMMUNICATIONS   5 ( 4016 )   4016   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/ncomms5016

  • Electrogenerated Chemiluminescence of Donor–Acceptor Molecules with Thermally Activated Delayed Fluorescence Reviewed International journal

    126 ( 27 )   7113 - 7116   2014.5

    　More details

    Language：English  

    DOI： 10.1002/ange.201402615

  • Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full-Color Delayed Fluorescence OLEDs Reviewed International journal

    Sae Youn Lee; Takuma Yasuda; Yu Seok Yang; Qisheng Zhang; Chihaya Adachi

    Angew. Chem. Int. Ed.   126 ( 25 )   6520 - 6524   2014.5

    　More details

    Language：English  

    DOI： 10.1002/ange.201402992

  • A designed fluorescent anthracene derivative: Theory, calculation, synthesis, and characterization Reviewed

    Motoyuki Uejima, Tohru Sato, Masahiro Detani, Atsushi Wakamiya, Furitsu Suzuki, Hajime Suzuki, Tatsuya Fukushima, Kazuyoshi Tanaka, Yasujiro Murata, Chihaya Adachi, Hironori Kaji

    CHEMICAL PHYSICS LETTERS   602   80 - 83   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2014.04.017

  • Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence Reviewed

    Qisheng Zhang, Bo Li, Shuping Huang, Hiroko Nomura, Hiroyuki Tanaka, Chihaya Adachi

    NATURE PHOTONICS   8 ( 4 )   326 - 332   2014.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/NPHOTON.2014.12

  • Light-emitting organic field-effect transistors based on highly luminescent single crystals of thiophene/phenylene co-oligomers Reviewed International journal

    Takahiro Komori; Hajime Nakanotani; Takuma Yasuda; Chihaya Adachi

    J. Mater. Chem. C,   2   4918 - 4921   2014.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C4TC00164H

  • Flexible Porous Bismuth Telluride Thin Films with Enhanced Figure of Merit using Micro-Phase Separation of Block Copolymer Reviewed

    Kunihisa Kato, Yoshika Hatasako, Michitaka Uchino, Yasukazu Nakata, Yoshinori Suzuki, Teruaki Hayakawa, Chihaya Adachi, Koji Miyazaki

    ADVANCED MATERIALS INTERFACES   1 ( 2 )   2014.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/admi.201300015

  • Comparison of small amounts of polycrystalline donor materials in C-70-based bulk heterojunction photovoltaics and optimization of dinaphthothienothiophene based photovoltaic Reviewed

    Yan-qiong Zheng, William J. Potscavage, Qi-sheng Zhang, Takeshi Komino, Masatsugu Taneda, Chihaya Adachi

    ORGANIC ELECTRONICS   15 ( 4 )   878 - 885   2014.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2014.01.012

  • A six-carbazole-decorated cyclophosphazene as a host with high triplet energy to realize efficient delayed-fluorescence OLEDs Reviewed

    Takuro Nishimoto, Takuma Yasuda, Sae Youn Lee, Ryosuke Kondo, Chihaya Adachi

    MATERIALS HORIZONS   1 ( 2 )   264 - 269   2014.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3mh00079f

  • Enhanced out-coupling efficiency of organic light-emitting diodes using an nanostructure imprinted by an alumina nanohole array Reviewed

    Kuniaki Endo, Chihaya Adachi

    APPLIED PHYSICS LETTERS   104 ( 12 )   2014.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4869468

  • Self-assembly, Physicochemical, and Field-effect Transistor Properties of Solution-crystallized Organic Semiconductors Based on pi-Extended Dithieno[3,2-b:2 ',3 '-d]thiophenes Reviewed

    Hiroyuki Mieno, Takuma Yasuda, Yu Seok Yang, Chihaya Adachi

    CHEMISTRY LETTERS   43 ( 3 )   293 - 295   2014.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.130914

  • Dicarbazolyldicyanobenzenes as Thermally Activated Delayed Fluorescence Emitters: Effect of Substitution Position on Photo luminescent and Electroluminescent Properties Reviewed

    Bo Li, Hiroko Nomura, Hiroshi Miyazaki, Qisheng Zhang, Kou Yoshida, Yoshinori Suzuma, Akihiro Orita, Junzo Otera, Chihaya Adachi

    CHEMISTRY LETTERS   43 ( 3 )   319 - 321   2014.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.130907

  • 100 m-Order Patterning of Organic Semiconductor Layers Using a Thermally Converted Precursor Technique and its Application to Organic Light Emitting Diodes Reviewed

    Daisuke Goto, Masataka Mohri, Kei Morimoto, Aleksandre Mzhavia, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   2 ( 2 )   110 - 114   2014.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201300372

  • NEAR INFRARED PHOTO-DETECTOR USING SELF-ASSEMBLED FORMATION OF ORGANIC CRYSTALLINE NANOPILLAR ARRAYS Reviewed

    Yoshiharu Ajiki, Tetsuo Kan, Masayuki Yahiro, Akiko Hamada, Junji Adachi, Chihaya Adachi, Kiyoshi Matsumoto, Isao Shimoyama

    2014 IEEE 27TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS)   147 - 150   2014.1

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • MICROFLUIDIC ELECTROCHEMILUMINESCENCE (ECL) INTEGRATED FLOW CELL FOR PORTABLE FLUORESCENCE DETECTION Reviewed

    Miho Tsuwaki, Jun Mizuno, Takashi Kasahara, Tomohiko Edura, Eri Kunisawa, Ryoichi Ishimatsu, Shigeyuki Matsunami, Toshihiko Imato, Chihaya Adachi, Shuichi Shoji

    2014 IEEE 27TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS)   108 - 111   2014.1

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • Understanding extrinsic degradation in phosphorescent OLEDs Reviewed

    Hitoshi Yamamoto, Michael S. Weaver, Hideyuki Murata, Chihaya Adachi, Julie J. Brown

    Digest of Technical Papers - SID International Symposium   45 ( 1 )   758 - 761   2014.1

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

    Understanding extrinsic degradation in phosphorescent OLEDs
    We quantified water as an impurity in OLEDs and investigated how the water level impacts initial lifetime decay. We also demonstrated a two to three fold increase in lifetime for blue and green phosphorescent OLEDs by reducing the amount of water in the devices. © 2014 Society for Information Display.

    DOI： 10.1002/j.2168-0159.2014.tb00199.x

  • Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence (vol 3, 2127, 2013) Reviewed

    Hajime Nakanotani, Kensuke Masui, Junichi Nishide, Takumi Shibata, Chihaya Adachi

    SCIENTIFIC REPORTS   4   2014.1

    　More details

    Language：English  

    DOI： 10.1038/srep03640

  • An organic thin film photodiode as a portable photodetector for the detection of alkylphenol polyethoxylates by a flow fluorescence-immunoassay on magnetic microbeads in a microchannel Reviewed

    Ryoichi Ishimatsu, Azusa Naruse, Rong Liu, Koji Nakano, Masayuki Yahiro, Chihaya Adachi, Toshihiko Imato

    TALANTA   117   139 - 145   2013.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.talanta.2013.08.044

  • Formation of high-purity organic thin films by gas flow deposition and the effect of impurities on device characteristics Reviewed

    Kohei Tsugita, Tomohiko Edura, Masayuki Yahiro, Chihaya Adachi

    DISPLAYS   34 ( 5 )   418 - 422   2013.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.displa.2013.08.008

  • Mixing Effect of Gold and Silver Nanoparticles on Enhancement in Performance of Organic Thin-Film Solar Cells Reviewed

    Tsuyoshi Akiyama, Tomoki Yamamoto, Takeo Oku, Masayuki Yahiro, Takashi Kurihara, Chihaya Adachi, Sunao Yamada

    JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 12 )   1 - 122301   2013.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.7567/JJAP.52.122301

  • A highly luminescent spiro-anthracenone-based organic light-emitting diode exhibiting thermally activated delayed fluorescence Reviewed

    Keiro Nasu, Tetsuya Nakagawa, Hiroko Nomura, Chi-Jen Lin, Chien-Hong Cheng, Mei-Rurng Tseng, Takuma Yasuda, Chihaya Adachi

    CHEMICAL COMMUNICATIONS   49 ( 88 )   10385 - 10387   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3cc44179b

  • Systematic Conversion of Single Walled Carbon Nanotubes into n-type Thermoelectric Materials by Molecular Dopants Reviewed

    Yoshiyuki Nonoguchi, Kenji Ohashi, Rui Kanazawa, Koji Ashiba, Kenji Hata, Tetsuya Nakagawa, Chihaya Adachi, Tomoaki Tanase, Tsuyoshi Kawai

    SCIENTIFIC REPORTS   3 ( 3344 )   3344   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep03344(2013)

  • Systematic Conversion of Single Walled Carbon Nanotubes into n-type Thermoelectric Materials by Molecular Dopants Reviewed

    Yoshiyuki Nonoguchi, Kenji Ohashi, Rui Kanazawa, Koji Ashiba, Kenji Hata, Tetsuya Nakagawa, Chihaya Adachi, Tomoaki Tanase, Tsuyoshi Kawai

    SCIENTIFIC REPORTS   3   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep03344(2013)

  • Polymorphism in 9,9-diarylfluorene-based organic semiconductors: influence on optoelectronic functions Reviewed International journal

    Jun Yun Kim; Takuma Yasuda; Yu Seok Yang; Naoki Matsumto; Chihaya Adachi

    Chem. Commun   50   1523 - 1526   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C3CC48566H

  • Analysis of exciton annihilation in high-efficiency sky-blue organic light-emitting diodes with thermally activated delayed fluorescence Reviewed

    Kensuke Masui, Hajime Nakanotani, Chihaya Adachi

    ORGANIC ELECTRONICS   14 ( 11 )   2721 - 2726   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2013.07.010

  • Multi-color light-emitting transistors composed of organic single crystals Reviewed International journal

    CHIHAYA ADACHI

    ORGANIC ELECTRONICS   14 ( 11 )   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2013.07.025

  • Plasma-tolerant structure for organic light-emitting diodes with aluminum cathodes fabricated by DC magnetron sputtering: Using a Li-doped electron transport layer Reviewed International journal

    CHIHAYA ADACHI

    ORGANIC ELECTRONICS   14 ( 11 )   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2013.08.020

  • Enhanced electroluminescence based on thermally activated delayed fluorescence from a carbazole-triazine derivative Reviewed

    Tomas Serevicius, Tetsuya Nakagawa, Ming-Cheng Kuo, Shuo-Hsien Cheng, Ken-Tsung Wong, Chih-Hao Chang, Raymond C. Kwong, Sean Xia, Chihaya Adachi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   15 ( 38 )   15850 - 15855   2013.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3cp52255e

  • 常温大気中で高効率蓄光機能を示す有機材料 Reviewed

    平田修造, 安達千波矢, 渡辺敏行, 戸谷健朗

    70 ( 11 )   623 - 636   2013.10

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1295/koron.70.623

  • Multi-layered organic light-emitting diode fabrication using low molecular weight materials by electrospray method Reviewed

    Yasushi Koishikawa, Hiroshi Miyazaki, Masayuki Yahiro, Chihaya Adachi

    Thin Solid Films   545   527 - 532   2013.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.tsf.2013.07.083

  • Twisted Intramolecular Charge Transfer State for Long-Wavelength Thermally Activated Delayed Fluorescence Reviewed

    Hiroyuki Tanaka, Katsuyuki Shizu, Hajime Nakanotani, Chihaya Adachi

    CHEMISTRY OF MATERIALS   25 ( 18 )   3766 - 3771   2013.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/cm402428a

  • Computational prediction for singlet- and triplet-transition energies of charge-transfer compounds Reviewed

    Shuping Huang, Qisheng Zhang, Yoshihito Shiota, Tetsuya Nakagawa, Kazuhiro Kuwabara, Kazunari Yoshizawa, Chihaya Adachi

    Journal of Chemical Theory and Computation   9 ( 9 )   3872 - 3877   2013.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ct400415r

  • Capacitance-voltage characteristics of a 4,4 '-bis[(N-carbazole)styryl]biphenyl based organic light-emitting diode: Implications for characteristic times and their distribution Reviewed

    Le Zhang, Hajime Nakanotani, Chihaya Adachi

    APPLIED PHYSICS LETTERS   103 ( 9 )   2013.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4819436

  • Suppression of Efficiency Roll-Off Characteristics in Thermally Activated Delayed Fluorescence Based Organic Light-Emitting Diodes Using Randomly Oriented Host Molecules Reviewed

    Takeshi Komino, Hiroko Nomura, Takahiro Koyanagi, Chihaya Adachi

    CHEMISTRY OF MATERIALS   25 ( 15 )   3038 - 3047   2013.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/cm4011597

  • Efficient Persistent Room Temperature Phosphorescence in Organic Amorphous Materials under Ambient Conditions Reviewed

    Shuzo Hirata, Kenro Totani, Junxiang Zhang, Takashi Yamashita, Hironori Kaji, Seth R. Marder, Toshiyuki Watanabe, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   23 ( 27 )   3386 - 3397   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201203706

  • Solvent Effect on Thermally Activated Delayed Fluorescence by 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Reviewed

    Ryoichi Ishimatsu, Shigeyuki Matsunami, Katsuyuki Shizu, Chihaya Adachi, Koji Nakano, Toshihiko Imato

    JOURNAL OF PHYSICAL CHEMISTRY A   117 ( 27 )   5607 - 5612   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp404120s

  • Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence Reviewed International journal

    CHIHAYA ADACHI

    SCIENTIFIC REPORTS   3   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep02127

  • Droplet Manipulation by an External Electric Field for Crystalline Film Growth Reviewed

    Takeshi Komino, Hirokazu Kuwabara, Masaaki Ikeda, Masayuki Yahiro, Kazuo Takimiya, Chihaya Adachi

    LANGMUIR   29 ( 30 )   9592 - 9597   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/la401729k

  • High performance organic field-effect transistors based on single-crystal microribbons and microsheets of solution-processed dithieno[3,2-b:2′, 3′-d]thiophene derivatives Reviewed

    49 ( 58 )   6483 - 6485   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    We present π-conjugated dithieno[3,2-b:2′,3′-d]thiophene derivatives that act as high-performance p-type organic semiconductors. These molecules self-organize into single-crystal microribbons or microsheets. High carrier mobilities of up to 10.2 cm&lt
    sup&gt
    2&lt
    /sup&gt
    V&lt
    sup&gt
    -1&lt
    /sup&gt
    s&lt
    sup&gt
    -1&lt
    /sup&gt
    and high on/off ratios of ∼10&lt
    sup&gt
    7&lt
    /sup&gt
    have been achieved in organic single-crystal field-effect transistors. © 2013 The Royal Society of Chemistry.

    DOI： 10.1039/c3cc42114g

  • Reversible Thermal Recording Media Using Time-Dependent Persistent Room Temperature Phosphorescence Reviewed

    Shuzo Hirata, Kenro Totani, Hironori Kaji, Martin Vacha, Toshiyuki Watanabe, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   1 ( 6 )   438 - 442   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201300136

  • Amplified Spontaneous Emission and Electroluminescence from Thiophene/Phenylene Co-Oligomer-Doped p-bis(p-Styrylstyryl)Benzene Crystals Reviewed

    Hajime Nakanotani, Chihaya Adachi

    ADVANCED OPTICAL MATERIALS   1 ( 6 )   422 - 427   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adom.201200066

  • Fabrication and performance evaluation of microfluidic organic light emitting diode Reviewed

    Takashi Kasahara, Shigeyuki Matsunami, Tomohiko Edura, Juro Oshima, Chihaya Adachi, Shuichi Shoji, Jun Mizuno

    SENSORS AND ACTUATORS A-PHYSICAL   195   219 - 223   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.sna.2012.12.031

  • Oxadiazole- and Triazole-Based Highly-Efficient Thermally-Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodes Reviewed International journal

    CHIHAYA ADACHI

    J. Mater. Chem. C 2013, 1, 4599-4604.   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Self-Organizing Mesomorphic Diketopyrrolopyrrole Derivatives for Efficient Solution-Processed Organic Solar Cells Reviewed

    Woong Shin, Takuma Yasuda, Go Watanabe, Yu Seok Yang, Chihaya Adachi

    CHEMISTRY OF MATERIALS   25 ( 12 )   2549 - 2556   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/cm401244x

  • Organic luminescent molecule with energetically equivalent singlet and triplet excited states for organic light-emitting diodes Reviewed

    Keigo Sato, Katsuyuki Shizu, Kazuaki Yoshimura, Atsushi Kawada, Hiroshi Miyazaki, Chihaya Adachi

    Physical Review Letters   110 ( 24 )   247401   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevLett.110.247401

  • Highly Efficient Organic Light-Emitting Diode Based on a Hidden Thermally Activated Delayed Fluorescence Channel in a Heptazine Derivative Reviewed

    Jie Li, Tetsuya Nakagawa, James MacDonald, Qisheng Zhang, Hiroko Nomura, Hiroshi Miyazaki, Chihaya Adachi

    ADVANCED MATERIALS   25 ( 24 )   3319 - 3323   2013.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201300575

  • Bifunctional star-burst amorphous molecular materials for OLEDs: Achieving highly efficient solid-state luminescence and carrier transport induced by spontaneous molecular orientation Reviewed

    Jun Yun Kim, Takuma Yasuda, Yu Seok Yang, Chihaya Adachi

    Advanced Materials   25 ( 19 )   2666 - 2671   2013.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201204902

  • Photo-patternable electroluminescence based on one-way photoisomerization reaction of tetraoxidized triangle terarylenes Reviewed International journal

    Maki Taguchi, Tetsuya Nakagawa, Takuya Nakashima, CHIHAYA ADACHI

    Chem. Comm.   2013.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C3CC41825A

  • A host material consisting of a phosphinic amide directly linked donor-acceptor structure for efficient blue phosphorescent organic light-emitting diodes Reviewed

    Atsushi Wada, Takuma Yasuda, Qisheng Zhang, Yu Seok Yang, Isao Takasu, Shintaro Enomoto, Chihaya Adachi

    Journal of Materials Chemistry C   1 ( 13 )   2404 - 2407   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3tc00939d

  • Molecular Design of High Molecular Orientation Electron Transport Materials and Application to Organic Light-Emitting Diodes Reviewed International journal

    Kazunori Togashi, Yuta Sagara, Takuma Yasuda, CHIHAYA ADACHI

    Chem. Lett. 3013, 42, in press.   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Highly efficient bulk heterojunction photovoltaic cells based on C 70 and tetraphenyldibenzoperiflanthene Reviewed

    Yan-Qiong Zheng, William J. Potscavage, Takeshi Komino, Masaya Hirade, Junji Adachi, Chihaya Adachi

    Applied Physics Letters   102 ( 14 )   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4801647

  • Highly efficient bulk heterojunction photovoltaic cell based on tris[4-(5-phenylthiophen-2-yl)phenyl]amine and C-70 combined with optimized electron transport layer Reviewed

    Yan-qiong Zheng, William J. Potscavage, Takeshi Komino, Chihaya Adachi

    APPLIED PHYSICS LETTERS   102 ( 15 )   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4801954

  • Reduced amplified spontaneous emission threshold in organic semiconductor laser structure with relaxed roll-off characteristics under high current densities Reviewed International journal

    Munetomo Inoue, Kenichi Goushi, Kuniaki Endo, Hiroko Nomura, CHIHAYA ADACHI

    Journal of Luminescence   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2013.04.001

  • Triphenylene-based Host Materials for Low-voltage, Highly Efficient Red Phosphorescent Organic Light-emitting Diodes Reviewed

    Kazunori Togashi, Takuma Yasuda, Chihaya Adachi

    CHEMISTRY LETTERS   42 ( 4 )   383 - 385   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.121247

  • Effects of Intramolecular Donor-Acceptor Interactions on Bimolecular Recombination in Small-Molecule Organic Photovoltaic Cells Reviewed International journal

    Masaya Hirade, Takuma Yasuda, CHIHAYA ADACHI

    JOURNAL OF PHYSICAL CHEMISTRY C   117 ( 10 )   4986 - 4991   2013.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp400386q

  • Reorganization of the molecular orientation at the organic/substrate interface in spirofluorene thin films Reviewed

    Takeshi Komino, Hiroko Nomura, Masayuki Yahiro, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   563   70 - 75   2013.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2013.01.056

  • Effects of Intramolecular Donor-Acceptor Interactions on Bimolecular Recombination in Small-Molecule Organic Photovoltaic Cells Reviewed

    Masaya Hirade, Takuma Yasuda, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   117 ( 10 )   4986 - 4991   2013.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp400386q

  • Variable multi-color microfluidic organic light emitting device based on mixing of electrochemiluminescence solutions Reviewed

    T. Kasahara, J. Mizuno, S. Matsunami, T. Edura, M. Tsuwaki, J. Oshima, C. Adachi, S. Shoji

    2013 Transducers and Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013   2596 - 2599   2013.1

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1109/Transducers.2013.6627337

  • MULTI-COLOR MICROFLUIDIC ORGANIC LIGHT EMITTING DEVICE USING ELECTROLUMINESCENCE AND ELECTROCHEMILUMINESCENCE Reviewed

    T. Kasahara, J. Mizuno, S. Matsunami, T. Edura, M. Tsuwaki, J. Oshima, C. Adachi, S. Shoji

    26TH IEEE INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS 2013)   1133 - 1136   2013.1

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1109/MEMSYS.2013.6474450

  • Light-Emitting Organic Crystal Field-Effect Transistors for Future Organic Injection Lasers Reviewed

    Hajime Nakanotani, Chihaya Adachi

    Physics of Organic Semiconductors: Second Edition   603 - 621   2013.1

    　More details

    Language：English  

    DOI： 10.1002/9783527655946.ch18

  • Highly efficient organic light-emitting diodes from delayed fluorescence Reviewed

    Hiroki Uoyama, Kenichi Goushi, Katsuyuki Shizu, Hiroko Nomura, Chihaya Adachi

    NATURE   492 ( 7428 )   234 - +   2012.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/nature11687

  • Organic Single-Crystal Transistors Based on π-Extended Heteroheptacene Microribbons Reviewed

    85 ( 11 )   1186 - 1191   2012.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Facile synthesis of a new series of pi-extended thienoacenes has been described. Their electronic structures have been elucidated by UV-vis absorption and photoelectron spectra. Well-defined single-crystal microribbons composed of self-organized thienoacene molecules have been fabricated using physical vapor transport, and have been applied to field-effect transistors. The organic transistors employing the single-crystal microribbons exhibit mobilities as high as 0.47 cm(2) V s(-1) with on/off ratios of ca. 10(6).

    DOI： 10.1246/bcsj.20120178

  • Efficient green thermally activated delayed fluorescence (TADF) from a phenoxazine-triphenyltriazine (PXZ-TRZ) derivative Reviewed International journal

    Hiroyuki Tanaka, Katsuyuki Shizu, Hiroshi Miyazaki, CHIHAYA ADACHI

    Chem. Comm.   48 ( 93 )   11392 - 11394   2012.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C2CC36237F

  • Formation of nanostructured donor/acceptor interfaces and their application to organic photovoltaic cells Reviewed

    Manabu Nakata, Kenji Kawano, Mao Yasumatsu, Masayuki Yahiro, Chihaya Adachi

    THIN SOLID FILMS   522   357 - 360   2012.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.tsf.2012.08.008

  • Enhanced Electroluminescence Efficiency in a Spiro-Acridine Derivative through Thermally Activated Delayed Fluorescence Reviewed International journal

    Gabor Mehes, Hiroko Nomura, Tetsuya Nakagawa, CHIHAYA ADACHI

    Angewandte Chemie   51 ( 45 )   11311 - 11315   2012.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201206289

  • Reversible Coloration Enhanced by Electrochemical Deposition of an Ultrathin Zinc Layer onto an Anodic Nanoporous Alumina Layer Reviewed

    Shuzo Hirata, Toshiro Tsuji, Yoshimine Kato, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   22 ( 20 )   4195 - 4201   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201200353

  • Organic Single-Crystal Transistors Based on pi-Extended Heteroheptacene Microribbons Reviewed International journal

    YANG YUSEOK, Takuma Yasuda, CHIHAYA ADACHI

    Bull. Chem. Soc. Jpn. 2012, 85, 1186-1191.   85   1186 - 1191   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.20120178

  • Fluorinated Carbazole Derivatives as Wide-Energy-Gap Host Material for Blue Phosphorescent Organic Light-Emitting Diodes Reviewed International journal

    Yukitani Mizuno, Isao Takasu, Shuichi Uchikoga, Shuichi Enomoto, Tomoaki Sawabe, Akiko Amano, Atsushi Wada, Tomoko Sugizaki, Jiro Yoshida, Tomio Ono, CHIHAYA ADACHI

    JOURNAL OF PHYSICAL CHEMISTRY C   116 ( 39 )   20681 - 20687   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp303085h

  • Fluorinated Carbazole Derivatives as Wide-Energy-Gap Host Material for Blue Phosphorescent Organic Light-Emitting Diodes Reviewed

    Yukitami Mizuno, Isao Takasu, Shuichi Uchikoga, Shintaro Enomoto, Tomoaki Sawabe, Akio Amano, Atsushi Wada, Tomoko Sugizaki, Jiro Yoshida, Tomio Ono, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   116 ( 39 )   20681 - 20687   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp303085h

  • Liquid Carbazole Substituted with a Poly(ethylene oxide) Group and Its Application for Liquid Organic Light-emitting Diodes Reviewed

    Korefumi Kubota, Shuzo Hirata, Yuki Shibano, Osamu Hirata, Masayuki Yahiro, Chihaya Adachi

    CHEMISTRY LETTERS   41 ( 9 )   934 - 936   2012.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.2012.934

  • Uniform and refreshable liquid electroluminescent device with a back side reservoir Reviewed

    Chang-Hoon Shim, Shuzo Hirata, Juro Oshima, Tomohiko Edura, Reiji Hattori, Chihaya Adachi

    APPLIED PHYSICS LETTERS   101 ( 11 )   2012.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4749791

  • Design of Efficient Thermally Activated Delayed Fluorescence Materials for Pure Blue Organic Light Emitting Diodes Reviewed

    Qisheng Zhang, Jie Li, Katsuyuki Shizu, Shuping Huang, Shuzo Hirata, Hiroshi Miyazaki, Chihaya Adachi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   134 ( 36 )   14706 - 14709   2012.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja306538w

  • Low Driving Voltage Characteristics of Triphenylene Derivatives as Electron Transport Materials in Organic Light-Emitting Diodes Reviewed International journal

    Kazunori Togashi, Shinataro Nomura, Norimasa Yokoyama, Takuma Yasuda, CHIHAYA ADACHI

    J. Mater. Chem. 2012, 22, 20689-20695.   22 ( 38 )   20689 - 20695   2012.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c2jm33669c

  • High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules Reviewed

    Sae Youn Lee, Takuma Yasuda, Hiroko Nomura, Chihaya Adachi

    APPLIED PHYSICS LETTERS   101 ( 9 )   2012.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4749285

  • Performance of an organic photodiode as an optical defector and its application to fluorometric flow-immunoassay for IgA Reviewed

    Mayo Miyake, Hizuru Nakajima, Akihide Hemmi, Masayuki Yahiro, Chihaya Adachi, Nobuaki Soh, Ryoichi Ishimatsu, Koji Nakano, Katsumi Uchiyama, Toshihiko Imato

    TALANTA   96   132 - 139   2012.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.talanta.2012.02.006

  • Efficient organic light-emitting diodes through up-conversion from triplet to singlet excited states of exciplexes Reviewed

    Kenichi Goushi, Chihaya Adachi

    APPLIED PHYSICS LETTERS   101 ( 2 )   2012.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4737006

  • Highly luminescent π-conjugated dithienometalloles: photophysical properties and their application in organic light-emitting diodes International journal

    33 ( 22 )   16810 - 16816   2012.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C2JM33526C

  • Very high open-circuit voltage of 5.89 V in organic solar cells with 10-fold-tandem structure Reviewed

    Ye Zou, Zhenbo Deng, William J. Potscavage, Masaya Hirade, Yanqiong Zheng, Chihaya Adachi

    APPLIED PHYSICS LETTERS   100 ( 24 )   2012.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4729009

  • Triplet Exciton Confinement in Green Organic Light-Emitting Diodes Containing Luminescent Charge-Transfer Cu(I) Complexes Reviewed

    Qisheng Zhang, Takeshi Komino, Shuping Huang, Shigeyuki Matsunami, Kenichi Goushi, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   22 ( 11 )   2327 - 2336   2012.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201101907

  • Very high open-circuit voltage of 5.89 V in organic solar cells with 10-fold-tandem structure

    Zou Ye, Zhen Bo, William John Potscavage, Masaya Hirade, ZHENG YANQIONG, CHIHAYA ADACHI

    APPLIED PHYSICS LETTERS   100 ( 24 )   243302   2012.6

    　More details

    Language：English  

    DOI： 10.1063/1.4729009

  • Delayed Fluorescence by Reverse Intersystem Crossing and Application to Organic Light-Emitting Diodes Reviewed

    Kenichi Goushi, Chihaya Adachi

    2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)   2012.5

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • Real-Time Measurement of Molecular Orientational Randomization Dynamics during Annealing Treatments by In-Situ Ellipsometry Reviewed

    Takeshi Komino, Hiroko Nomura, Masayuki Yahiro, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   116 ( 21 )   11584 - 11588   2012.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/Jp302158k

  • Proceedings of SPIE - The International Society for Optical Engineering: Introduction Reviewed

    Barry P. Rand, Chihaya Adachi, Volker Van Elsbergen

    Proceedings of SPIE - The International Society for Optical Engineering   8435   2012.4

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1117/12.978944

  • Identification of device degradation positions in multi-layered phosphorescent organic light emitting devices using water probes Reviewed

    Hitoshi Yamamoto, Chihaya Adachi, Michael S. Weaver, Julie J. Brown

    APPLIED PHYSICS LETTERS   100 ( 18 )   2012.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.4711129

  • Improved Device Lifetime of Organic Light Emitting Diodes with an Electrochemically Stable pi-Conjugated Liquid Host in the Liquid Emitting Layer Reviewed

    Shuzo Hirata, Hyo Jung Heo, Yuki Shibano, Osamu Hirata, Masayuki Yahiro, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   51 ( 4 )   2012.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JJAP.51.041604

  • Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion Reviewed

    Kenichi Goushi, Kou Yoshida, Keigo Sato, Chihaya Adachi

    NATURE PHOTONICS   6 ( 4 )   253 - 258   2012.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/nphoton.2012.31

  • Horizontal Orientation of Disk-like Hole Transport Molecules and Their Application for Organic Light-Emitting Diodes Requiring a Lower Driving Voltage Reviewed

    Jun Y. Kim, Daisuke Yokoyama, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   116 ( 15 )   8699 - 8706   2012.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp301650x

  • Electroluminescence Based on Thermally Activated Delayed Fluorescence Generated by a Spirobifluorene Donor-Acceptor Structure Reviewed International journal

    Tetsuya Nakagawa, Sung-Yu Ku, Ken-Tsung Wong, CHIHAYA ADACHI

    Chem. Comm.   48   9580   2012.4

    　More details

    Language：English  

    DOI： 10.1039/C2CC31468A

  • [2,2']Bi[naphtho[2,3-b]furanyl]: a versatile organic semiconductor with a furan-furan junction Reviewed International journal

    N. Niimi, H. Mori, E. Miyazaki, I. Osaka, K. takimiya, CHIHAYA ADACHI

    Chem. Comm.   48   5892 - 5894   2012.4

    　More details

    Language：English  

    DOI： 10.1039/C2CC31960H

  • Identification of device degradation positions in multi-layered phosphorescent organic light emitting devices using water probes

    Hitoshi Yamamoto, CHIHAYA ADACHI, Michael S. Weaver, Julie J. Brown

    APPLIED PHYSICS LETTERS   100 ( 18 )   2012.4

    　More details

    Language：English  

    DOI： 10.1063/1.4711129

  • Efficient Luminescence from a Copper(I) Complex Doped in Organic Light-Emitting Diodes by Suppressing C-H Vibrational Quenching Reviewed International journal

    Atsushi Wada, QISHENG ZHANG, Takuma Yasuda, Takasu Isao, Shintaro Enomoto, CHIHAYA ADACHI

    Chem. Comm.   48   5340 - 5342   2012.3

    　More details

    Language：English  

    DOI： 10.1039/C2CC31509B

  • Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion Reviewed International journal

    Kenichi Goushi, Kou Yoshida, Keigo Sato, Chihaya Adachi

    Nature Photonics   2012.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • MICROFLUIDIC ORGANIC LIGHT EMITTING DIODE (OLED) USING LIQUID ORGANIC SEMICONDUCTORS Reviewed

    T. Kasahara, J. Mizuno, S. Hirata, T. Edura, S. Matsunami, C. Adachi, S. Shoji

    2012 IEEE 25TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS)   2012.1

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1109/MEMSYS.2012.6170256

  • A dicarbazole-triazine hybrid bipolar host material for highly efficient green phosphorescent OLEDs Reviewed International journal

    Chih-Hao Chang, Ming-Cheng Kuo, Wei-Chieh Lin, Yu-Ting Chen, Ken-Tsung Wong, Shu-Hua Chou, Ejabul Mondal, Raymond C. Kwong, Sean Xia, Tetsuya Nakagawa and Chihaya Adachi

    Journal of Materials Chemistry   22   2012.1

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/C2JM14686J

  • Synthesis and characterization of CdSe nanocrystals capped with TOPO and pyridine Reviewed

    Xiang Dong Luo, Umme Farva, Nguyen Tam Nguyen Truong, Kyung Soo Son, Pei Sheng Liu, Chihaya Adachi, Chinho Park

    JOURNAL OF CRYSTAL GROWTH   339 ( 1 )   22 - 30   2012.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jcrysgro.2011.11.048

  • Novel Concept Organic Semiconductors Useful for Organic Light Emitting Diodes Reviewed

    Chihaya Adachi

    IDW'11: PROCEEDINGS OF THE 18TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3   791 - 794   2011.12

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • An integrated enzyme-linked immunosorbent assay system with an organic light-emitting diode and a charge-coupled device for fluorescence detection Reviewed

    Hizuru Nakajima, Yukiko Okuma, Kazuhiro Morioka, Mayo Miyake, Akihide Hemmi, Tatsuya Tobita, Masayuki Yahiro, Daisuke Yokoyama, Chihaya Adachi, Nobuaki Soh, Koji Nakano, Shuhua Xue, Hulie Zeng, Katsumi Uchiyama, Toshihiko Imato

    JOURNAL OF SEPARATION SCIENCE   34 ( 20 )   2906 - 2912   2011.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/jssc.201100429

  • Small molecular organic photovoltaic cells with exciton blocking layer at anode interface for improved device performance Reviewed

    Masaya Hirade, Chihaya Adachi

    APPLIED PHYSICS LETTERS   99 ( 15 )   153302   2011.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3650472

  • Dependence of the Amplified Spontaneous Emission Threshold in Spirofluorene Thin Films on Molecular Orientation Reviewed

    Takeshi Komino, Hiroko Nomura, Masayuki Yahiro, Kuniaki Endo, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   115 ( 40 )   19890 - 19896   2011.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp2007717

  • High Carrier Mobility of 3.8 cm(2) V-1 s(-1) in Polydiacetylene Thin Films Polymerized by Electron Beam Irradiation Reviewed

    Takuji Kato, Mao Yasumatsu, Chikako Origuchi, Kyoji Tsutsui, Yasukiyo Ueda, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   4 ( 9 )   2011.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.4.091601

  • High Carrier Mobility of 3.8 cm(2) V-1 s(-1) in Polydiacetylene Thin Films Polymerized by Electron Beam Irradiation Reviewed

    Takuji Kato, Mao Yasumatsu, Chikako Origuchi, Kyoji Tsutsui, Yasukiyo Ueda, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   4 ( 9 )   91601   2011.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.4.091601

  • Two-dimensional orientation control of organic semiconducting amorphous films by mechanical brushing Reviewed

    Toshiharu Arai, Kenichi Goushi, Hiroko Nomura, Tomohiko Edura, Chihaya Adachi

    APPLIED PHYSICS LETTERS   99 ( 5 )   2011.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3608315

  • Thermoelectric properties of n-type C-60 thin films and their application in organic thermovoltaic devices Reviewed

    Mao Sumino, Kentaro Harada, Masaaki Ikeda, Saburo Tanaka, Koji Miyazaki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   99 ( 9 )   2011.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3631633

  • Phenanthrene-functionalized 3,6-dithiophen-2-yl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-diones as donor molecules for solution-processed organic photovoltaic cells Reviewed

    Zhonglian Wu, Aiyuan Li, Benhu Fan, Feng Xue, Chihaya Adachi, Jianyong Ouyang

    SOLAR ENERGY MATERIALS AND SOLAR CELLS   95 ( 8 )   2516 - 2523   2011.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.solmat.2011.05.006

  • Photophysical characteristics of 4,4’-bis(N-carbazolyl)tolan derivatives and their application in organic light emitting diodes Reviewed

    131 ( 7 )   1520 - 1524   2011.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2011.01.028

  • Horizontal Orientation of a Linear-Shaped Platinum(II) Complex in Organic Light-Emitting Diodes with a High Light Out-Coupling Efficiency Reviewed

    Masatsugu Taneda, Takuma Yasuda, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   4 ( 7 )   2011.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.4.071602

  • Photophysical characteristics of 4,4’-bis(N-carbazolyl)tolan derivatives and their application in organic light emitting diodes International journal

    131 ( 7 )   2011.7

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jlumin.2011.01.028

  • p-i-n Homojunction in Organic Light-Emitting Transistors Reviewed

    Satria Zulkarnaen Bisri, Taishi Takenobu, Kosuke Sawabe, Satoshi Tsuda, Yohei Yomogidao, Takeshi Yamao, Shu Hotta, Chihaya Adachi, Yoshihiro Iwasa

    ADVANCED MATERIALS   23 ( 24 )   2753 - 2758   2011.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201004572

  • Horizontal Orientation of a Linear-Shaped Platinum(II) Complex in Organic Light-Emitting Diodes with a High Light Out-Coupling Efficiency Reviewed International journal

    Masatsugu Taneda, Takuma Yasuda, and Chihaya Adachi

    Applied Physics Express   4   2011.6

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.4.071602

  • Organic Electrodes Consisting of Dianthratetrathiafulvalene and Fullerene and Their Application in Organic Field Effect Transistors Reviewed

    Takuji Kato, Chikako Origuchi, Masato Shinoda, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   50 ( 5 )   50202   2011.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JJAP.50.050202

  • Light extractionfrom surface plasmons and waveguide modes with nanoimprinted gratings in organic light-emitting diodes Reviewed International journal

    Joerg Frischeisen, Quan Niu, Robert Gehlhaar, Giuseppe Scarpa, Chihaya Adachi, Paolo Lugli, and Wolfgang Brutting

    Optical Express   19 ( S1 )   2011.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OE.19.0000A7

  • Increased light outcoupling efficiency in dye-doped small molecule organic light-emitting diodes with horizontally oriented emitters Reviewed

    Joerg Frischeisen, Daisuke Yokoyama, Ayataka Endo, Chihaya Adachi, Wolfgang Bruetting

    ORGANIC ELECTRONICS   12 ( 5 )   809 - 817   2011.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.orgel.2011.02.005

  • Highly photostable distributed-feedback polymer waveguide blue laser using spirobifluorene derivatives Reviewed

    Hirotaka So, Hirofumi Watanabe, Masayuki Yahiro, Yu Yang, Yuji Oki, Chihaya Adachi

    OPTICAL MATERIALS   33 ( 6 )   755 - 758   2011.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.optmat.2010.12.011

  • highly photostable distributed-feedback polymer waveguide blue laser using spirobifluorene derivatives

    Hirotake So, Hirofumi Watanabe, Masayuki Yahiro, Yu Yang, Yuji Oki and Chihaya Adachi

    Opt. Mat.   33 ( 6 )   2011.4

    　More details

    Language：English  

  • Molecular Stacking Induced by Intermolecular C-H center dot center dot center dot N Hydrogen Bonds Leading to High Carrier Mobility in Vacuum-Deposited Organic Films Reviewed

    Daisuke Yokoyama, Hisahiro Sasabe, Yukio Furukawa, Chihaya Adachi, Junji Kido

    ADVANCED FUNCTIONAL MATERIALS   21 ( 8 )   1375 - 1382   2011.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201001919

  • Improvement of Electroluminescence Performance of Organic Light-Emitting Diodes with a Liquid-Emitting Layer by Introduction of Electrolyte and a Hole-Blocking Layer Reviewed

    Shuzo Hirata, Korefumi Kubota, Heo Hyo Jung, Osamu Hirata, Kenichi Goushi, Masayuki Yahiro, Chihaya Adachi

    ADVANCED MATERIALS   23 ( 7 )   889 - +   2011.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adma.201003505

  • Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes Reviewed

    Ayataka Endo, Keigo Sato, Kazuaki Yoshimura, Takahiro Kai, Atsushi Kawada, Hiroshi Miyazaki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   98 ( 8 )   2011.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3558906

  • Light extraction from surface plasmons and waveguide modes in an organic light-emitting layer by nanoimprinted gratings Reviewed

    Joerg Frischeisen, Quan Niu, Alaa Abdellah, Joerg B. Kinzel, Robert Gehlhaar, Giuseppe Scarpa, Chihaya Adachi, Paolo Lugli, Wolfgang Bruetting

    OPTICS EXPRESS   19 ( 1 )   A7 - A19   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Light extraction from surface plasmons and waveguide modes in an organic light-emitting layer by nanoimprinted gratings Reviewed

    Joerg Frischeisen, Quan Niu, Alaa Abdellah, Joerg B. Kinzel, Robert Gehlhaar, Giuseppe Scarpa, Chihaya Adachi, Paolo Lugli, Wolfgang Bruetting

    OPTICS EXPRESS   19 ( 1 )   A7 - A19   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/OE.19.0000A7

  • Formation of Organic Crystalline Nanopillar Arrays and Their Application to Organic Photovoltaic Cells Reviewed

    Masaya Hirade, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi

    ACS APPLIED MATERIALS & INTERFACES   3 ( 1 )   80 - 83   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/am100915s

  • Enhanced figure of merit of a porous thin film of bismuth antimony telluride Reviewed

    Makoto Kashiwagi, Shuzo Hirata, Kentaro Harada, Yanqiong Zheng, Koji Miyazaki, Masayuki Yahiro, Chihaya Adachi

    APPLIED PHYSICS LETTERS   98 ( 2 )   23114   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3543852

  • Strategies for enhanced light extraction from surface plasmons in organic light-emitting diodes Reviewed International journal

    Jorg Frischeisen, Bert Scholz, Benedikt Arndt, Tobias Schmidt, Robert Gehlhaar, Chihaya Adachi and Wolfgang Brutting

    J. Photonics for Energy   1   2011.1

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1117/1.3523314

  • Highly conductive interface between a rubrene single crystal and a molybdenum oxide layer and its application in transistors Reviewed

    Hajime Nakanotani, Hayato Kakizoe, Chihaya Adachi

    SOLID STATE COMMUNICATIONS   151 ( 1 )   93 - 96   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ssc.2010.10.004

  • Organic molecules based on dithienyl-2,1,3-benzothiadiazole as new donor materials for solution-processed organic photovoltaic cells Reviewed

    Zhonglian Wu, Benhu Fan, Feng Xue, Chihaya Adachi, Jianyong Ouyang

    SOLAR ENERGY MATERIALS AND SOLAR CELLS   94 ( 12 )   2230 - 2237   2010.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.solmat.2010.07.017

  • Organic molecules based on dithienyl-2,1,3-benzothiadiazole as new donor materials for solution-processed organic photovoltaic cells Reviewed

    Zhonglian Wu, Benhu Fan, Feng Xue, Chihaya Adachi, Jianyong Ouyang

    SOLAR ENERGY MATERIALS AND SOLAR CELLS   94 ( 12 )   2230 - 2237   2010.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.solmat.2010.07.017

  • Fluoro-substituted Phenyleneethynylenes Acetylenic n-Type Organic Semiconductors Reviewed

    Daisuke Matsuo, Xin Yang, Akiko Hamada, Kyo Morimoto, Takuji Kato, Masayuki Yahiro, Chihaya Adachi, Akihiro Orita, Junzo Otera

    CHEMISTRY LETTERS   39 ( 12 )   1300 - 1302   2010.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.2010.1300

  • Nanocrystal growth and improved performance of small molecule bulk heterojunction solar cells composed of a blend of chloroaluminum Phthalocyanine and C70 Reviewed International journal

    Kentaro Harada, Tomohiko Edura and Chihaya Adachi

    Appl. Phys. Exp.   3   2010.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.3.121602

  • A distributed-feedback organic waveguide blue laser using spirobifluorene derivatives Reviewed

    Hirotaka So, Hirofumi Watanabe, Yu Yang, Yuji Oki, Chihaya Adachi, Masayuki Yahiro

    TENCON 2010: 2010 IEEE REGION 10 CONFERENCE   440 - 443   2010.11

    　More details

    Language：English   Publishing type：Research paper (other academic)  

  • Horizontal Molecular Orientation in Vacuum-Deposited Organic Amorphous Films Reviewed

    Daisuke Yokoyama, Chihaya Adachi

    WOLEDS AND ORGANIC PHOTOVOLTAICS: RECENT ADVANCES AND APPLICATIONS   137 - +   2010.10

    　More details

    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1007/978-3-642-14935-1_5

  • Suppression of roll-off characteristics of electroluminescence at high current densities in organic light emitting diodes by introducing reduced carrier injection barriers Reviewed

    Yousuke Setoguchi, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   108 ( 6 )   64516   2010.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3488883

  • 3,6-Diarylcarbazole Derivatives as a Host Material in Organic Electrophosphorescent Diodes Reviewed

    Kenji Muneuchi, Masaomi Sasaki, Hiroyuki Sasabe, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   49 ( 8 )   2010.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JJAP.49.080208

  • In situ real-time spectroscopic ellipsometry measurement for the investigation of molecular orientation in organic amorphous multilayer structures Reviewed

    Daisuke Yokoyama, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   107 ( 12 )   2010.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3432568

  • Improved thermoelectric performance of organic thin-film elements utilizing a bilayer structure of pentacene and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F-4-TCNQ) Reviewed

    Kentaro Harada, Mao Sumino, Chihaya Adachi, Saburo Tanaka, Koji Miyazaki

    APPLIED PHYSICS LETTERS   96 ( 25 )   2010.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/1.3456394

  • Photoluminescence Characteristics of Organic Host Materials with Wide Energy Gaps for Organic Electrophosphorescent Devices Reviewed

    Ayataka Endo, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   49 ( 5 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JJAP.49.050205

  • Emission Color Tuning in Ambipolar Organic Single-Crystal Field-Effect Transistors by Dye-Doping Reviewed

    Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   20 ( 10 )   1610 - 1615   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.200902339

  • In situ real-time spectroscopic ellipsometry measurement for investigation of molecular orientation in organic amorphous multilayer structures International journal

    Daisuke Yokoyama,Chihaya Adachi

    J.Appl.Phys.   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Orientation control of linear-shaped molecules in vacuum-deposited organic amorphous films and its effect on carrier mobilities International journal

    Daisuke Yokoyama ,Yousuke Setoguchi,Akiko Sakaguchi,Michio Suzuki,Chihaya Adachi

    Adv.Funct.Mat..   ( 20 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Preparation under high humidity conditions of nano-porous polymer film with 80 nm minimum pore size International journal

    Takatoshi Nishio, Makoto Kashiwagi,Koji Miyazaki,Masayuki Yahiro,Chihaya Adachi

    Appl.Phys.Exp..   ( 3 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Organic light-emitting diodes containing multilayers of organic single crystals International journal

    Hajime Nakanotani,Chihaya Adachi

    Appl.Phys.Lett..   ( 96 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Reduced initial degradation of bulk heterojunction organic solar cells by incorporation of stacked fullerene and lithium fullerene interlayers International journal

    Kenji Kawano,Chihaya Adachi

    Appl.Phys.Lett..   ( 96 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Photoluminescence characteristics of organic host materials with wide energy gaps for organic electrophosphorecent devices International journal

    Ayataka Endo,Chihaya Adachi

    Jpn.JAppl..Phys.   ( 49 )   2010.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Formation of Organic Nanodots with a Minimum Diameter of 40 nm Using Conventional Vacuum Vapor Deposition Reviewed

    Manabu Nakata, Kenji Kawano, Mao Yasumatsu, Masayuki Yahiro, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   3 ( 5 )   2010.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/APEX.3.055201

  • Emission color tuning in ambipolar organic single crystal field-effect transistors by dye-doping International journal

    Hajime Nakanotani,Masatoshi Saitou,Hiroaki Nakamura,Chihaya Adachi

    Adv.Funct.Mat   2010.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Determination of molecular dipole orientation in fluorescent organic thin films by photoluminescence measurement International journal

    Joerg Frischeisen ,Daisuke Yokoyama,Chihaya Adachi, Wolfgang Bruetting

    Appl.Phys.Lett.   ( 96 )   2010.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Exciplex formations at HTL/Alq3 interface in organic light-emitting diode: influence of electron-hole recombination zone and electric field International journal

    Naoki Matsumoto,Chihaya Adachi

    J.Phys.Chem.C.   ( 114(10) )   2010.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Formation of Organic Nanodots with a Minimum Diameter of 40 nm Using Conventional Vacuum Vapor Deposition International journal

    Manabu Nakata,Kenji kawano, Mao Yasumatsu,Masayuki Yahiro,Chihaya Adachi

    Appl.Ohys.Exp..   ( 3 )   2010.4

    <