Updated on 2024/07/28

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(Joint Appointment)
Abolition organization (Joint Appointment)
Center for Organic Photonics and Electronics Research(OPERA) (Joint Appointment)
Center for Future Chemistry (Joint Appointment)
School of Engineering (Joint Appointment)
Graduate School of Engineering (Joint Appointment)
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.
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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  

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    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  

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    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

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    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  

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    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」

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    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。

  • 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

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    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  

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    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  

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    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  

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    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  

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    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  

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    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  

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    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  

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    作業中

  • SID Fellow Awards

    2014.5   SID  

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    【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”

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Papers

  • 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

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

  • 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

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

    DOI: 10.1038/s41467-024-46406-5

  • 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

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    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

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    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

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    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

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    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 % and 14.0% for CzPyBF and mCBP hosts, respectively. Further, high EQEs of 19.2% and 12.9% 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

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    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

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

    DOI: 10.1039/d3tc03979j

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

    Angewandte Chemie International Edition   63 ( 2 )   2023.12

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    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

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    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

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    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

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    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

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    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 & Technology B   41 ( 6 )   2023.10

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    DOI: 10.1116/6.0003050

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

    12 ( 3 )   2023.10

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    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

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    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

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    DOI: 10.1016/j.cej.2023.144516

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

    62 ( 44 )   2023.9

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    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

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    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

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    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

  • Oxygen‐Induced Reversible Degradation of Perovskite Solar Cells Reviewed

    7 ( 14 )   2023.6

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    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

    13 ( 1 )   2023.5

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    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

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

    2023.5

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1021/acsmaterialslett.3c00310

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

    2023.3

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    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

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    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

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    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

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    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

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    DOI: 10.1038/s41566-022-01106-8

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

    35 ( 11 )   2023.1

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    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

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    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

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    DOI: 10.1016/j.cplett.2022.140155

  • A Materials Acceleration Platform for Organic Laser Discovery

    Advanced Materials   35 ( 6 )   2207070 - 2207070   2022.12

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1039/d2cc01467j

  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1002/adma.202201409

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

    10 ( 20 )   8109 - 8124   2022.5

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1021/acs.jpclett.1c02140

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

    2021.7

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    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

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    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

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    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

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    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

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    DOI: 10.1002/aelm.202100486

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

    60 ( 40 )   21817 - 21823   2021.6

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1039/D0MA00756K

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

    50 ( 4 )   800 - 803   2021.4

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    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

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    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

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    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

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    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

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    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

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    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

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    <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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1039/d0sc04699j

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

    Hajime Nakanotani, Youichi Tsuchiya, Chihaya Adachi

    Chemistry Letters   2021.1

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    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

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    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

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    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

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    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

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    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

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    <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

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    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

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    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

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    DOI: 10.1039/d0sc04583g

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

    8 ( 21 )   2000896 - 2000896   2020.11

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1039/d0mh00952k

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

    4 ( 10 )   2000305 - 2000305   2020.10

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.31635/ccschem.020.202000327

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

    49 ( 8 )   932 - 935   2020.8

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1002/adfm.202001078

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

    Advanced Functional Materials   2000580   2020.6

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1063/1.5113647

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

    7   12601 - 12609   2019.9

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1364/OME.9.001150

  • 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

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    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

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    Fabrication-method Independence of Organic Long-persistent Luminescence Performance

    DOI: 10.1246/cl.180949

  • 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

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    DOI: 10.1016/j.optmat.2019.03.012

  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1002/adom.201800376

  • 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

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

    DOI: 10.1002/adma.201803713

  • 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

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

    DOI: 10.1002/adma.201800365

  • 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

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    DOI: 10.1002/adma.201802662

  • 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

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    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

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    Vacuum chamber considerations for improved organic light-emitting diode lifetime

    DOI: 10.1063/1.5047542

  • 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

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

    DOI: 10.1002/adfm.201802130

  • 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

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    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

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    DOI: 10.1021/acs.chemmater.8b02247

  • 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

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    DOI: 10.1063/1.5025870

  • 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

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    DOI: 10.1002/adma.201802662

  • 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

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    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

  • 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

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    DOI: 10.1117/1.JPE.8.032102

  • 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

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

    DOI: 10.1002/anie.201804218

  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1021/acs.jpclett.7b03232

  • Thermally activated delayed fluorescence of a Zr-based metal–organic framework

    54 ( 6 )   631 - 634   2018.1

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    <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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    © 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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1002/slct.201702449

  • Organic long persistent luminescence Reviewed

    Ryota Kabe, Chihaya Adachi

    Nature   550 ( 7676 )   384 - 387   2017.10

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1007/s11664-013-2852-0

  • Third-generation organic electroluminescence materials Reviewed

    Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   53 ( 6 )   2014.6

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1038/ncomms5016

  • Electrogenerated Chemiluminescence of Donor–Acceptor Molecules with Thermally Activated Delayed Fluorescence Reviewed International journal

    126 ( 27 )   7113 - 7116   2014.5

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1038/nature11687

  • Organic Single-Crystal Transistors Based on π-Extended Heteroheptacene Microribbons Reviewed

    85 ( 11 )   1186 - 1191   2012.11

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    DOI: 10.1039/C2CC31509B

  • 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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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  • 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

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    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

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    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

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    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

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  • 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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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    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

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    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

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  • 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

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    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

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    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

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  • 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

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    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

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    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

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    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

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    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

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  • 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

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  • 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

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  • Organic light-emitting diodes containing multilayers of organic single crystals International journal

    Hajime Nakanotani,Chihaya Adachi

    Appl.Phys.Lett..   ( 96 )   2010.5

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  • 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

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  • 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

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  • 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

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    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

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  • 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

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  • 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

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  • 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

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  • Exciplex Formations at the HTL/Alq(3) Interface in an Organic Light-Emitting Diode: Influence of the Electron-Hole Recombination Zone and Electric Field Reviewed

    Naoki Matsumoto, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   114 ( 10 )   4652 - 4658   2010.3

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    DOI: 10.1021/jp9121062

  • Preparation under High Humidity Conditions of Nanoporous Polymer Film with 80 nm Minimum Pore Size Reviewed

    Takatoshi Nishio, Makoto Kashiwagi, Koji Miyazaki, Masayuki Yahiro, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   3 ( 2 )   2010.2

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    DOI: 10.1143/APEX.3.025201

  • Reduced initial degradation of bulk heterojunction organic solar cells by incorporation of stacked fullerene and lithium fluoride interlayers Reviewed

    Kenji Kawano, Chihaya Adachi

    APPLIED PHYSICS LETTERS   96 ( 5 )   2010.2

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    DOI: 10.1063/1.3297876

  • Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements Reviewed

    Joerg Frischeisen, Daisuke Yokoyama, Chihaya Adachi, Wolfgang Bruetting

    APPLIED PHYSICS LETTERS   96 ( 7 )   2010.2

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    DOI: 10.1063/1.3309705

  • Organic light-emitting diodes containing multilayers of organic single crystals Reviewed

    Hajime Nakanotani, Chihaya Adachi

    APPLIED PHYSICS LETTERS   96 ( 5 )   2010.2

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    DOI: 10.1063/1.3298558

  • Orientation Control of Linear-Shaped Molecules in Vacuum-Deposited Organic Amorphous Films and Its Effect on Carrier Mobilities Reviewed

    Daisuke Yokoyama, Yousuke Setoguchi, Akio Sakaguchi, Michio Suzuki, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   20 ( 3 )   386 - 391   2010.2

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    DOI: 10.1002/adfm.200901684

  • Durable & printable blue-violet DFB solid-state dye lasers using spirobifluorene derivatives Reviewed

    H. Watanabe, M. Yahiro, Y. Yang, Y. Oki, C. Adachi

    2009 LASERS & ELECTRO-OPTICS & THE PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1 AND 2   1184 - +   2009.12

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    DOI: 10.1109/CLEOPR.2009.5292352

  • Thermally Activated Delayed Fluorescence from Sn4+-Porphyrin Complexes and Their Application to Organic Light-Emitting Diodes - A Novel Mechanism for Electroluminescence Reviewed

    Ayataka Endo, Mai Ogasawara, Atsushi Takahashi, Daisuke Yokoyama, Yoshimine Kato, Chihaya Adachi

    ADVANCED MATERIALS   21 ( 47 )   4802 - +   2009.12

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    DOI: 10.1002/adma.200900983

  • Enhancement of electron transport by horizontal molecular orientation of oxadiazole planar molecules in organic amorphous films Reviewed

    Daisuke Yokoyama, Akio Sakaguchi, Michio Suzuki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 24 )   2009.12

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    DOI: 10.1063/1.3274135

  • Photoluminescence characteristics of tris(2-phenylquinoline)iridium(III) dispersed in an iridium complex host layer Reviewed

    Ayataka Endo, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   483 ( 4-6 )   224 - 226   2009.12

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    DOI: 10.1016/j.cplett.2009.10.064

  • Evaluating Carrier Accumulation in Degraded Bulk Heterojunction Organic Solar Cells by a Thermally Stimulated Current Technique Reviewed

    Kenji Kawano, Chihaya Adachi

    ADVANCED FUNCTIONAL MATERIALS   19 ( 24 )   3934 - 3940   2009.12

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    DOI: 10.1002/adfm.200901573

  • Enhancement of electron transport by horizontal molecular orientation of oxadiazole planar molecules in organic amorphous films International journal

    Daisuke Yokoyama,Akio Sakaguchi,Michio Suzuki,Chihaya Adachi

    Appl.Phys.Lett.   ( 95 )   2009.12

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  • Dependence of polarization splitting on mode tuning in microcavities Reviewed

    F. Becker, M. Langner, H. Froeb, V. G. Lyssenko, K. Leo, C. Adachi

    APPLIED PHYSICS LETTERS   95 ( 19 )   2009.11

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    DOI: 10.1063/1.3263145

  • Effect of Molecular Morphology on Amplified Spontaneous Emission of Bis-Styrylbenzene Derivatives Reviewed

    Ryota Kabe, Hajime Nakanotani, Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi

    ADVANCED MATERIALS   21 ( 40 )   4034 - +   2009.10

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    DOI: 10.1002/adma.200803588

  • Organic light-emitting devices using organic thin-film single crystals Reviewed

    Hajime Nakanotani, Chihaya Adachi

    EURODISPLAY 2009   50 - 51   2009.9

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  • Tuning of threshold voltage by interfacial carrier doping in organic single crystal ambipolar light-emitting transistors and their bright electroluminescence Reviewed

    Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 10 )   2009.9

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    DOI: 10.1063/1.3216047

  • Single molecule color controllable light emitting organic field effect transistors for white light emission with high color stability Reviewed

    Tung-Huei Ke, Robert Gehlhaar, Chih-Hsin Chen, Jiann-T Lin, Chung-Chih Wu, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 6 )   2009.8

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    DOI: 10.1063/1.3202763

  • Organic Thin-Film Solar Cells Using Electron-Donating Perylene Tetracarboxylic Acid Derivatives Reviewed

    Yuki Shibano, Hiroshi Imahori, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   113 ( 34 )   15454 - 15466   2009.8

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    DOI: 10.1021/jp9045726

  • Organic light-emitting diode with liquid emitting layer Reviewed

    Denghui Xu, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 5 )   2009.8

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    DOI: 10.1063/1.3200947

  • Organic light-emitting diode having liquid emitting layer International journal

    Denghui Xu Ke,Chihaya Adachi

    Appl.Phys.Lett..   ( 95 )   2009.8

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  • Control of the molecular orientation of a 2,2(')-bithiophene-9,9-dioctylfluorene copolymer by laser annealing and subsequent enhancement of the field effect transistor characteristics Reviewed

    Korefumi Kubota, Takuji Kato, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 7 )   2009.8

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    DOI: 10.1063/1.3211125

  • Thermally activated delayed fluorescence from Sn4+-porphyrin comlexes and their application to organic light emitting diodes-a novel mechanism for electroluminescence International journal

    Ayataka Endo,Mai Ogasawara,Atsushi Takahashi,Disuke Yokoyama,Yoshimine Katou,Chihaya Adachi

    Adv.Mater   ( 21 )   2009.8

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  • Control of the molecular orientation of a 2,2`-bithiophene-9,9`-dioctylfluorene copolymer by laser-annealing and subsequent enhancement of FET characteristics International journal

    Korefumi Kubota,Takuji Kato, Chihaya Adachi

    Appl.PHys.Lett..   ( 95 )   2009.8

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  • Single molecule color controllable light emitting organic field effect transistors for white light emission with high color stability International journal

    Tung-Huei Ke,Robert Gehlhaar,Chih-Hsin Chen,Jiaan-T Lin,Chung-Chih Wu,Chihaya Adachi

    Appl.Phys.Lett..   ( 95 )   2009.8

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  • Highly balanced ambipolar mobilities with intense electroluminescence in field-effect transistors based on organic single crystal oligo(p-phenylenevinylene) derivatives Reviewed

    Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

    APPLIED PHYSICS LETTERS   95 ( 3 )   2009.7

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    DOI: 10.1063/1.3184588

  • Organic Thin-Film Solar Cell Using Electron-Donating Perylene Tetracarboxylic Acid Derivatives International journal

    Y.Shibano,H.Imahori,C.Adachi

    J.Phys.Chem.C.   ( 113 )   2009.7

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  • Highly balanced ambipolar mobilities with intense electroluminescence in field-effect transistors based on organic single crystal oligo(p-phenylenevinylene)derivatives International journal

    Hajime Nakanotani,Masatoshi Saito,Hiroaki nakamura,Chihaya Adachi

    Appl.Phys.Lett..   ( 95 )   2009.7

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  • Low-Threshold Blue Emission from First-Order Organic DFB Laser Using 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9 '-Spirobifluorene as Active Gain Medium Reviewed

    Masaya Hirade, Hajime Nakanotani, Reiji Hattori, Akihiro Ikeda, Masayuki Yahiro, Chihaya Adachi

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS   504   1 - 8   2009.6

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    DOI: 10.1080/15421400902938928

  • Charge separation and transport behavior of a two-dimensional charge sheet at organic donor-acceptor heterointerfaces Reviewed

    Tomo Sakanoue, Toru Irie, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   105 ( 11 )   2009.6

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    DOI: 10.1063/1.3137192

  • Tunig of threshold voltage by interfacial carrier doping in organic single crystal ambipolar light-emittting transistors and their bright electroluminescence International journal

    Hajime Kubota,Msatoshi Saito,Hiroaki Nakamura, Chihaya Adachi

    Appl.Phys.Lett..   ( 95 )   2009.5

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  • Molecular Modification of 2,7-Diphenyl[1]benzothieno[3,2-b]benzothiophene (DPh-BTBT) with Diarylamino Substituents: From Crystalline Order to Amorphous State in Evaporated Thin Films Reviewed

    Takafumi Izawa, Hiroki Mori, Yusuke Shinmura, Masahito Iwatani, Eigo Miyazaki, Kazuo Takimiya, Hsio-Wen Hung, Masayuki Yahiro, Chihaya Adachi

    CHEMISTRY LETTERS   38 ( 5 )   420 - 421   2009.5

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    DOI: 10.1246/cl.2009.420

  • Blue emitting fluorophores of phenyleneethnylense substituted by diphenylethenyl terminal groups for organic light emitting diodes International journal

    Gouliang Mao,Akihiro Orita,Larysa Feneko,Masayuki Yahiro, Chihaya Adachi,Junzo Otera

    Mat.Chem.Phys..   ( 115 )   2009.5

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  • Efficient deep-blue organic light-emitting diodes based on 9,9-bis(4-biphenyly)fluorene derivatives International journal

    N.Matsumoto,T.Miyazaki,M.Nishiyama,C.Adachi

    J.Phys.Chem.C.   ( 113 )   2009.5

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  • Blue emitting fluorophores of phenyleneethynylenes substituted by diphenylethenyl terminal groups for organic light-emitting diodes Reviewed

    Guoliang Mao, Akihiro Orita, Larysa Fenenko, Masayuki Yahiro, Chihaya Adachi, Junzo Otera

    MATERIALS CHEMISTRY AND PHYSICS   115 ( 1 )   378 - 384   2009.5

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    DOI: 10.1016/j.matchemphys.2008.12.015

  • Effect of molecular morpholgy on amplified spontaneous emission of bis-styrylbenzene derivatives International journal

    Ryota Kabe,Hajime Nakanotani,Tomo Sakanoue,Masayuki Yahiro,Chihaya Adachi

    Adv.Mater..   ( 40 )   2009.5

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  • Photoluminescence characteristics of tris(2-phenylquinoline)iridium (Ⅲ)dispersed in an iridium complex host layer International journal

    ( 483 )   2009.5

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  • Photoluminescence characteristics of tris(2-phenylquinoline)iridium (Ⅲ)dispersed in an iridium complex host layer International journal

    ( 483 )   2009.5

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  • Photoluminescence characteristics of tris(2-phenylquinoline)iridium (Ⅲ)dispersed in an iridium complex host layer International journal

    ( 483 )   2009.5

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  • High efficiency blue light emitting unipolar transistor incorporating multifunctional electrodes Reviewed

    Tung-Huei Ke, Robert Gehlhaar, Chih-Hsin Chen, Jiann-T Lin, Chung-Chih Wu, Chihaya Adachi

    APPLIED PHYSICS LETTERS   94 ( 15 )   2009.4

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    DOI: 10.1063/1.3109800

  • Efficient Deep-Blue Organic Light-Emitting Diodes Based on 9,9-Bis(4-biphenylyl)fluorene Derivatives Reviewed

    Naoki Matsumoto, Takanori Miyazaki, Masakazu Nishiyama, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   113 ( 15 )   6261 - 6266   2009.4

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    DOI: 10.1021/jp809024h

  • Effect of solvent on fabrication of active layers in organic solar cells based on poly(3-hexylthiophene) and fullerene derivatives Reviewed

    Kenji Kawano, Jun Sakai, Masayuki Yahiro, Chihaya Adachi

    SOLAR ENERGY MATERIALS AND SOLAR CELLS   93 ( 4 )   514 - 518   2009.4

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    DOI: 10.1016/j.solmat.2008.11.003

  • Efffect of solvent on fabrication of active layers in organic solar cells based on poly(3-hexylthiophene)and fullerene derivatives International journal

    Kenji kawano,Jun Sakai,Masyuki Yahiro,Chihaya Adachi

    Sol.Energy Mater.Sol.Cells.   2009.4

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  • High efficiency blue light emitting unipolar transistor incorporating multifunctional electrodes

    Tung-Huei Ke,Robert Gehlhaar,Chih-Hsin Chen,Jiann-T'suen Lin,Chung-Chih Wu,Chihaya Adachi

    Appl.Phys.Lett..   ( 94 )   2009.4

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  • Nanoparticles of adaptive supramolecular networks self-assembled from nucleotides and lanthanide irons International journal

    R.Nishiyabu,N.Hashimoto,T.Cho,K.Watanabe,T.Yasunaga,A.Endo,K.Kaneko,T.Niidome,M.Murata,C.Adachi,Y.Katayama,M.Hashizume,N.Kimuzuka

    J.Am.Chem.Soc..   ( 131 )   2009.3

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  • Nanoparticles of Adaptive Supramolecular Networks Self-Assembled from Nucleotides and Lanthanide Ions Reviewed

    Ryuhei Nishiyabu, Nozomi Hashimoto, Ten Cho, Kazuto Watanabe, Takefumi Yasunaga, Ayataka Endo, Kenji Kaneko, Takuro Niidome, Masaharu Murata, Chihaya Adachi, Yoshiki Katayama, Makoto Hashizume, Nobuo Kimizuka

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   131 ( 6 )   2151 - 2158   2009.2

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    DOI: 10.1021/ja8058843

  • Horizontal orientation of linear-shaped organic molecules having bulky substituents in near and doped vacuum-deposited amorphous films International journal

    Daisuke Yokoyama,Akio Sakaguchi,MIchio Suzuki,Chihaya Adachi

    Org.Electron..   2009.2

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  • Horizontal orientation of linear-shaped organic molecules having bulky substituents in neat and doped vacuum-deposited amorphous films Reviewed

    Daisuke Yokoyama, Akio Sakaguchi, Michio Suzuki, Chihaya Adachi

    ORGANIC ELECTRONICS   10 ( 1 )   127 - 137   2009.2

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    DOI: 10.1016/j.orgel.2008.10.010

  • Low threshold blue emission from first-order organic DFB laser using 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9`-spirobifluorene as active gain medium International journal

    Masaya Hirade,Hajime Nakanotani ,Reiji Hattori,Akihiro Ikeda,Masayuki Yahiro,Chihaya Adachi

    Mol.Cryst.Liq.Cryst   ( 504 )   2009.1

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  • Charge separation and transport behavior of a two-dimensional charge sheet at organic donor-acceptor heterointerface International journal

    Tomo Sakanoue,Toru Irie,Chihaya Adachi

    J.Appl.Phys..   ( 105 )   2009.1

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  • Thermally Activated Delayed Fluorescence (TADF) from Sn4(+)-porphyrin Complexes and Their Application to Organic Light Emitting Diodes - Novel Pathway for High Efficiency Electroluminescence Reviewed

    Ayataka Endo, Mai Ogasawara, Atsushi Takahashi, Yoshimine Kato, Chihaya Adachi

    28TH INTERNATIONAL DISPLAY RESEARCH CONFERENCE   23 - 25   2008.12

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  • Enhancing hole transports and generating hole traps by doping organic hole-transport layers with p-type molecules of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane Reviewed

    Toshinori Matsushima, Chihaya Adachi

    THIN SOLID FILMS   517 ( 2 )   874 - 877   2008.11

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    DOI: 10.1016/j.tsf.2008.07.008

  • Organic light emitting devices from OLED to organic laser diode Reviewed

    Chihaya Adachi, Toshinori Matsushima, Hajime Nakanotani, Daisuke Yokoyama, Masayuki Yahiro

    AOE 2007: ASIA OPTICAL FIBER COMMUNICATION & OPTOELECTRONIC EXPOSITION & CONFERENCE, CONFERENCE PROCEEDINGS   189 - +   2008.10

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    DOI: 10.1109/AOE.2007.4410748

  • Horizontal molecular orientation in vacuum-deposited organic amorphous films of hole and electron transport materials Reviewed

    Daisuke Yokoyama, Akio Sakaguchi, Michio Suzuki, Chihaya Adachi

    APPLIED PHYSICS LETTERS   93 ( 17 )   2008.10

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    DOI: 10.1063/1.2996258

  • Low driving voltage organic light emitting diode using phenanthrene oligomers as electron transport layer Reviewed

    Hsiao-Wen Hung, Norimasa Yokoyama, Masayuki Yahiro, Chihaya Adachi

    THIN SOLID FILMS   516 ( 23 )   8717 - 8720   2008.10

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    DOI: 10.1016/j.tsf.2008.05.047

  • Photosensitizing properties of the porphycene immobilized in sol-gel derived silica coating films Reviewed

    Hisashi Shimakoshi, Tatsushi Baba, Yusuke Iseki, Ayataka Endo, Chihaya Adachi, Midori Watanabe, Yoshio Hisaeda

    TETRAHEDRON LETTERS   49 ( 43 )   6198 - 6201   2008.10

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    DOI: 10.1016/j.tetlet.2008.08.003

  • Blue-light-emitting ambipolar field-effect transistors using an organic single crystal of 1,4-Bis(4-methylstyryl)benzene Reviewed

    Hajime Nakanotani, Ryota Kabe, Masayuki Yahiro, Taishi Takenobu, Yoshihiro Iwasa, Chihaya Adachi

    APPLIED PHYSICS EXPRESS   1 ( 9 )   2008.9

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    DOI: 10.1143/APEX.1.091801

  • Roll-off characteristics of electroluminescence efficiency of organic blue electrophosphorescence diodes Reviewed

    Kyung Soo Son, Masayuki Yariro, Toshiro Imai, Hiroki Yoshizaki, Junichi Nishide, Hiroyuki Sasabe, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 9 )   7363 - 7365   2008.9

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    DOI: 10.1143/JJAP.47.7363

  • FDTD simulations of external light out-coupling efficiency of organic field-effect transistors Reviewed

    Robert Gehlhaar, Masayuki Yahiro, Chihaya Adachi

    ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XII   7051   2008.8

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    DOI: 10.1117/12.793569

  • 22aTB-4 Unique Optoelectronic Properties of Organic Single-Crystal Ambipolar Light-Emitting Transistors Reviewed

    Bisri Satria Zulkarnaen, Takenobu Taishi, Tsuda Satoshi, Hotta Shu, Adachi Chihaya, Iwasa Yoshihiro

    63 ( 0 )   759 - 759   2008.8

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    22aTB-4 Unique Optoelectronic Properties of Organic Single-Crystal Ambipolar Light-Emitting Transistors

    DOI: 10.11316/jpsgaiyo.63.2.4.0_759_1

  • Spectrally narrow emissions at cutoff wavelength from edges of optically and electrically pumped anisotropic organic films (vol 103, artn 123104, 2008) Reviewed

    Daisuke Yokoyama, Masato Moriwake, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   104 ( 3 )   2008.8

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    DOI: 10.1063/1.2976164

  • Finite difference time domain analysis of the light extraction efficiency in organic light-emitting field-effect transistors Reviewed

    Robert Gehlhaar, Masayuki Yahiro, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   104 ( 3 )   2008.8

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    DOI: 10.1063/1.2968132

  • Measurement of photoluminescence efficiency of Ir(III) phenylpyridine derivatives in solution and solid-state films Reviewed

    Ayataka Endo, Kengo Suzuki, Toshitada Yoshihara, Seiji Tobita, Masayuki Yahiro, Chihaya Adachi

    CHEMICAL PHYSICS LETTERS   460 ( 1-3 )   155 - 157   2008.7

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    DOI: 10.1016/j.cplett.2008.05.064

  • Analyzing bipolar carrier transport characteristics of diarylamino-substituted heterocyclic compounds in organic light-emitting diodes by probing electroluminescence spectra Reviewed

    Kyung Soo Son, Masayuki Yahiro, Toshiro Imai, Hiroki Yoshizaki, Chihaya Adachi

    CHEMISTRY OF MATERIALS   20 ( 13 )   4439 - 4446   2008.7

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    DOI: 10.1021/cm8004985

  • Temperature-independent electron tunneling injection in tris (8-hydroxyquinoline) aluminum thin film from high-work-function gold electrode Reviewed

    Toshinori Matsushima, Chihaya Adachi

    THIN SOLID FILMS   516 ( 15 )   5069 - 5074   2008.6

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    DOI: 10.1016/j.tsf.2008.02.012

  • Temperature-independent current density voltage characteristics in tris(8-hydroxyquinoline)aluminum thin films Reviewed International journal

    Toshinori Matsushima and Chihaya Adachi

    Thin Solid Films   2008.6

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  • Spectrally narrow emissions at cutoff wavelength from edges of optically and electrically pumped anisotropic organic films Reviewed

    Daisuke Yokoyama, Masato Moriwake, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   103 ( 12 )   2008.6

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    DOI: 10.1063/1.2942401

  • Invited paper: Molecular design of organic semiconductors aiming for high performance OLED, OFET and organic laser diode Reviewed

    Chihaya Adachi

    2008 SID INTERNATIONAL SYMPOSIUM, DIGEST OF TECHNICAL PAPERS, VOL XXXIX, BOOKS I-III   39   604 - 608   2008.5

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  • Fabrication of ambipolar light-emitting transistor using high-photoluminescent organic single crystal Reviewed

    Bisri Satria Zulkarnaen, Takenobu Taishi, Yomogida Yohei, Yamao Takeshi, Yahiro Masayuki, Hotta Shu, Adachi Chihaya, Iwasa Yoshihiro

    ORGANIC OPTOELECTRONICS AND PHOTONICS III   6999   2008.5

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    Fabrication of ambipolar light-emitting transistor using high-photoluminescent organic single crystal
    Organic single-crystal ambipolar light-emitting transistors show a great interest due to their unique features, spectral matching with their active material spectra and the quantum efficiency preservation during ambipolar operation at high current density operation in kA/cm2 order. The development of ambipolar light emitting transistor based on high photoluminescent material, α,ω-bis(biphenylyl)terthiophene (BP3T) single crystal is reported. By using bottom-gated top-contact configuration, with Ca and Au opposed metal electrodes, high value of hole and electron mobility were obtained. Extremely bright light emission observed during ambipolar operation shows prospect for electrically driven amplified spontaneous emission from organic materials.

    DOI: 10.1117/12.781126

  • Material design of organic semiconductors for light emitting organic field-effect transistors and their device characteristics Reviewed

    Masayuki Yahiro, Tomo Sakanouel, Hiroyuki Uchiuzou, Takahito Oyamada, Akio Toshimitsu, Chihaya Adachi

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN   66 ( 5 )   493 - 503   2008.5

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    DOI: 10.5059/yukigoseikyokaishi.66.493

  • Exciplex formations between tris(8-hydoxyquinolate)aluminum and hole transport materials and their photoluminescence and electroluminescence characteristics Reviewed

    Naoki Matsumoto, Masakazu Nishiyarna, Chihaya Adachi

    JOURNAL OF PHYSICAL CHEMISTRY C   112 ( 20 )   7735 - 7741   2008.5

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    DOI: 10.1021/jp800443r

  • Highly efficient organic light-emitting diodes doped with thiophene/phenylene co-oligomer Reviewed

    Toshinori Matsushima, Chihaya Adachi

    CHEMISTRY OF MATERIALS   20 ( 9 )   2881 - 2883   2008.5

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    DOI: 10.1021/cm80009817

  • Electrical characteristics of single-component ambipolar organic field-effect transistors and effects of air exposure on them Reviewed

    Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi, Kazuo Takimiya, Akio Toshimitsu

    JOURNAL OF APPLIED PHYSICS   103 ( 9 )   2008.5

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    DOI: 10.1063/1.2919738

  • Photophysical and Photosensitizing properties of brominated porphycenes Reviewed

    Hisashi Shimakoshi, Tatsushi Baba, Yusuke Iseki, Isao Aritome, Ayataka Endo, Chihaya Adachi and Yoshio Hisaeda

    Chem.Comm.   2008.4

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  • Electrical Properties of 1,4-bis(4-(phenylethynyl)Phenylethynyl)Benzene and its Application for Organic Light Emitting Diodes

    Larysa Fenenko, Guang Shao, Akihiro Orita, Masayuki Yahiro, Funzo Otera, Sergei Svechnikov, and Chihaya Adachi

    Chem.Commin   2008.4

  • Bright electroluminescence from single-layer organic light-emitting diodes comprising an ambipolar carrier transport layer of phenyldipyrenylphosphine oxide Reviewed

    Toshinori Matsushima, Chihaya Adachi

    THIN SOLID FILMS   516 ( 12 )   4288 - 4292   2008.4

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    DOI: 10.1016/j.tsf.2007.09.038

  • Exciplex formation between Alq3 and hole transport materials and their photo-and electroluminescence characteristics Reviewed International journal

    Naoki Matsumoto, Masakazu Nishiyama, Chihaya Adachi

    J.Phys.Chem.C.   2008.4

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  • Photophysical and photocatalytic properties of beta-sulfonatoporphycenes Reviewed

    Tatsushi Baba, Hisashi Shimakoshi, Ayataka Endo, Chihaya Adachi, Yoshio Hisaeda

    CHEMISTRY LETTERS   37 ( 3 )   264 - 265   2008.3

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    DOI: 10.1246/cl.2008.264

  • Evaluating origin of electron traps in tris(8-hydroxyquinoline) aluminum thin films using thermally stimulated current technique Reviewed

    Toshinori Matsushima, Chihaya Adachi

    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 3 )   1748 - 1752   2008.3

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    DOI: 10.1143/JJAP.47.1748

  • 発光性有機トランジスタ用材料の分子設計とデバイス特性

    八尋 正幸、坂上 知、内生蔵 広幸、小山田 崇人、年光 昭夫、安達 千波矢

    有機合成化学協会誌   2008.2

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  • High current density in light-emitting transistors of organic single crystals Reviewed

    Taishi Takenobu, Satria Zulkarnaen Bisri, Tetsuo Takahashi, Masayuki Yahiro, Chihaya Adachi, Yoshihiro Iwasa

    PHYSICAL REVIEW LETTERS   100 ( 6 )   066601   2008.2

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    DOI: 10.1103/PhysRevLett.100.066601

  • Enhanced hole injection and transport in molybdenum-dioxide-doped organic hole-transporting layers Reviewed

    Toshinori Matsushima, Chihaya Adachi

    JOURNAL OF APPLIED PHYSICS   103 ( 3 )   2008.2

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    DOI: 10.1063/1.2836972

  • Alignment-free process for asymmetric contact electrodes and their application in light-emitting organic field-effect transistors Reviewed

    Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi, Jeremy H. Burroughes, Yoshiaki Oku, Noriyuki Shimoji, Takayoshi Takahashi, Akio Toshimitsu

    APPLIED PHYSICS LETTERS   92 ( 5 )   2008.2