Updated on 2025/06/13

Information

 

写真a

 
YASUDA TAKUMA
 
Organization
Institute for Advanced Study Professor
School of Engineering （Concurrent）
Graduate School of Engineering （Concurrent）
Title
Professor
Contact information
メールアドレス
Profile
Takuma YASUDA received his Ph.D. in 2005 from Tokyo Institute of Technology under the supervision of Prof. Takakazu Yamamoto. After completing postdoctoral research with Prof. Takashi Kato at the University of Tokyo, he was appointed Assistant Professor at the University of Tokyo in 2008. In 2010, he moved to Kyushu University where he joined Prof. Chihaya Adachi’s group as Associate Professor. He was also a concurrent researcher of JST-PRESTO from 2011 to 2014. In 2014, he was appointed Professor at the INAMORI Frontier Research Center of Kyushu University. Since 2022, he has been Professor at the Institute for Advanced Study, Kyushu University. His research is directed towards the design, synthesis, functionalization, and device applications of electro- and photo-active π-conjugated molecular materials. His current research interests include pioneering a new organic excitonics field aimed at unexplored and innovative functions. To date, he has published over 160 papers in peer-reviewed international journals, which have been cited over 12,500 times with an h-index of 60.
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Research Areas

  • Nanotechnology/Materials / Organic functional materials

  • Nanotechnology/Materials / Structural organic chemistry and physical organic chemistry

  • Nanotechnology/Materials / Functional solid state chemistry

  • Nanotechnology/Materials / Polymer chemistry

Degree

  • Ph.D. （ 2005.3 Tokyo Institute of Technology ）

Research History

  • Kyushu University Institute for Advanced Research Professor 

    2022.4 - Present

  • Kyushu University INAMORI Frontier Research Center Professor 

    2014.8 - 2022.3

  • Kyushu University School of Engineering Associate Professor 

    2010.4 - 2014.7

  • The University of Tokyo School of Engineering Assistant Professor 

    2008.8 - 2010.3

  • JSPS  Research Fellow 

    2006.4 - 2008.7

  • The University of Tokyo School of Science Research Fellow 

    2005.4 - 2006.3

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Awards

  • 第5回ジャパンリサーチフロントアワード

    2024.5   クラリベイト   Multiple resonance thermally activated delayed fluorescence materials for highly efficient and color-pure organic light-emitting diode

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    リサーチフロントアワードは、今後飛躍的な発展が期待される先端研究領域（リサーチフロント）をデータ分析に基づき特定し、その領域で世界をリードする日本の研究機関所属の研究者を表彰するものです。クラリベイトが分類した22の学術分野において、最も高い頻度で引用されている上位1%の論文（高被引用論文）のうち、後に発表された論文と一緒に引用（共引用）されている論文を分析し、先端研究領域および受賞者が選出されます。

  • 第56回 市村地球環境学術賞

    2024.3   市村清新技術財団   フレキシブル有機環境発電デバイスの開発と実用展開

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    市村地球環境学術賞

  • 日本化学会BCSJ賞

    2023.2   日本化学会   Photovoltaic Properties of π-Conjugated Polymers Based on Fused Cyclic Imide and Amide Skeletons

  • 有機合成化学協会 富士フイルム・機能性材料化学賞

    2023.2   有機合成化学協会   高速スピン変換を基軸とする革新的有機発光材料の創製

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    高速スピン変換を基軸とする革新的有機発光材料の創製

  • Publons Global Peer Review Awards 2019

    2019.9   Publons  

  • 第21回 丸文学術賞

    2018.3   丸文財団   有機半導体分子の設計・集積化技術と発光素子応用の研究

  • 平成27年度 科学技術分野の文部科学大臣表彰 若手科学者賞

    2015.4   文部科学省   有機半導体分子の高度集積と有機電子デバイスに関する研究

  • 日本化学会進歩賞

    2014.3   日本化学会   Development of Highly Functional Electronics Devices Utilizing Self-Organization of Organic Semiconducting Molecules

  • 高分子学会日立化成賞

    2013.9   高分子学会  

  • 有機合成化学協会九州山口支部　奨励賞

    2013.6   有機合成化学協会九州山口支部  

  • 日本化学会BCSJ賞

    2012.11   日本化学会   BCSJ Award from the Chemical Society of Japan

  • 日本化学会　優秀講演賞（学術）

    2012.4   日本化学会  

  • 有機合成化学協会　研究企画賞

    2011.2   有機合成化学協会  

  • 日本液晶学会賞奨励賞

    2010.9   日本液晶学会   ナノ構造を有する電子活性液晶に関する研究

  • 日本化学会　優秀講演賞（学術）

    2009.4   日本化学会  

  • 手島記念研究賞　博士論文賞

    2006.2   手島工業教育資金団  

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Papers

  • Directional Interior and Exterior Boron Doping in Functional Azacalixarenes Triggering Narrowband Delayed Fluorescence Reviewed International coauthorship

    Sudhir K. Keshri, Hiroko Nomura, Takuma Yasuda

    Advanced Optical Materials   13   2501193   2025.5

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

  • Blue-to-Green Fine-Tunable Narrowband Delayed Fluorescence in Peripherally Dendritic Modified Bis-Indolocarbazoles Reviewed

    Lee, JH; Watanabe, T; Hartmann, L; Yasuda, T

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   64   e202505191   2025.5   （ ISSN:14337851 eISSN:1521-3773 ）

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Angewandte Chemie - International Edition  

    Highly efficient narrowband organic luminophores offer immense potentials for organic light-emitting diodes (OLEDs) with high color purity of electroluminescence (EL). Appropriately controlling their structural relaxation and vibronic couplings between the excited and ground states enables the desired narrowband emissions. Herein, based on a design concept featuring dendritic modifications, we demonstrate the exquisite color tuning of narrowband emissions from deep blue to green in non-boron ubiquitous molecular systems. By attaching two or four arylamine-based dendritic units to the periphery of the indolo[3,2,1-jk]indolo[1′,2′,3′:1,7]indolo[3,2-b]carbazole (BICz) core, BICz-1.5G, BICz-2G, and BICz-2GII were developed as deep-blue, sky-blue, and green narrowband emitters, respectively. Comprehensive photophysical and computational studies revealed that the dendritic modifications do not impair the inherent narrowband emission ability of BICz while enhancing its thermally activated delayed fluorescence properties. OLEDs incorporating BICz-1.5G and BICz-2GII demonstrated high-efficiency, high-color-purity blue and green EL, with maximum external quantum efficiencies as high as 24.0% and 28.5%, respectively, and CIE coordinates of (0.13, 0.10) and (0.21, 0.68). Our findings will contribute to expanding the search space for narrowband organic luminophores.

    DOI： 10.1002/anie.202505191

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  • Simultaneous Emission Spectral Narrowing and Spin-Flip Acceleration in Multi-Resonance Organoboron Emitters via Sequential Indolo-Fusion π-Extension Reviewed

    Min, H; Yasuda, T

    ADVANCED OPTICAL MATERIALS   13   2500384   2025.3   （ ISSN:2195-1071 ）

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Advanced Optical Materials  

    Advanced cutting-edge organic light-emitting diode (OLED) technologies require narrowband electroluminescence (EL) with high quantum efficiency to growing performance demand. Here, sequential indolo-fusion π-extension as a rational design strategy to further narrow the emission bandwidth of multi-resonance thermally activated delayed fluorescence (MR-TADF) is introduced. By fusing one or two additional indole moieties to the periphery of Cz-B, a typical MR-TADF motif, gradual spectra narrowing, and accelerated triplet–singlet exciton spin conversion are concurrently achieved. Suppressing vibronic couplings induced by high-frequency vibrational modes is vital for achieving extreme spectral narrowing. OLEDs based on a doubly indolo-fused MR-TADF emitter, IDCz-B-II, exhibited ultra-narrowband sky-blue EL with a full width at half maximum of 21 nm (0.11 eV), maximum external EL quantum efficiency of 25.9%, and reduced efficiency roll-off, significantly outperforming the Cz-B-based device. The present indolo-fusion strategy provides a simple yet promising approach for developing isomeric MR-TADF materials with different fusing positions and orientations.

    DOI： 10.1002/adom.202500384

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  • Anti‐Stokes Emission Utilizing Reverse Intersystem Crossing Reviewed

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

    Angewandte Chemie International Edition   64 ( 7 )   e202419323   2025.2   （ ISSN:14337851 eISSN:1521-3773 ）

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

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

    DOI： 10.1002/anie.202419323

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  • Enhanced near-infrared phosphorescence found in a structurally similar host-guest system Reviewed

    Ishi-i, T; Nakaya, M; Umeki, T; Matsumoto, T; Lee, JH; Yasuda, T

    JOURNAL OF MATERIALS CHEMISTRY C   2024.10   （ ISSN:2050-7526 eISSN:2050-7534 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Materials Chemistry C  

    Longer-wavelength phosphorescence in the near-infrared (NIR) region has attracted attention in the field of biological application. Compared to widely studied shorter-wavelength green and yellow phosphorescence, achieving NIR phosphorescence is difficult because of a lack of versatile strategies using a phosphorescent platform. An NIR emission near 720 nm was observed for the benzoselenodiazole dye BSeD(OMe)-Br bearing bromine atoms and methoxy groups; nevertheless, its phosphorescence efficiency is weak. The NIR phosphorescence emission increased significantly when a trace amount of BSeD(OMe)-Br was incorporated into the one-dimensional aggregate structure composed of the corresponding benzothiadiazole dye BTD(OMe)-Br. In this host-guest BTD(OMe)-Br/BSeD(OMe)-Br system, an effective Dexter-type energy transfer with 92% efficiency occurs from the excited triplet state of the host BTD(OMe)-Br molecule to the excited triplet state of the guest BSeD(OMe)-Br molecule. In the 100 : 0.5 host-guest system, the phosphorescence intensity was enhanced by a factor of 200. The enhanced NIR phosphorescence through efficient energy transfer is attributed to a highly ordered host-guest aggregate structure arising from the same crystal packing pattern of the structurally similar host and guest molecules.

    DOI： 10.1039/d4tc03441d

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  • Inner-Bond-Cleavage Approach to Figure-Eight Macrocycles from Planar Aromatic Hydrocarbons Reviewed

    Reiji Yoshina, Junichiro Hirano, Emiko Nishimoto, Yuki Sakamoto, Keita Tajima, Shunsuke Minabe, Muhammet Uyanik, Kazuaki Ishihara, Tomoyuki Ikai, Eiji Yashima, Takuya Omine, Fumitaka Ishiwari, Akinori Saeki, Jinseok Kim, Juwon Oh, Dongho Kim, Guanting Liu, Takuma Yasuda, Hiroshi Shinokubo, Norihito Fukui

    Journal of the American Chemical Society   146 ( 43 )   29383 - 29390   2024.9   （ ISSN:0002-7863 eISSN:1520-5126 ）

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

    Figure-eight-shaped nonplanar π-systems adopt distinctive chiral D2-symmetric structures, which are ideal for realizing efficient circularly polarized luminescence (CPL). However, the short-step and enantioselective synthesis of figure-eight π-systems represents a considerable challenge for the conventional bottom-up synthetic strategy. Herein, we report that the oxidative cleavage of the internal double bond of a commercially available polycyclic aromatic hydrocarbon, i.e., dibenzo[g,p]chrysene (DBC), catalytically affords a figure-eight electron-accepting macrocycle, i.e., cyclobisbiphenylenecarbonyl (CBBC), with high scalability (up to 3.3 g) and excellent enantioselectivity (94% ee). This inner-bond-cleavage approach also applies to larger PAHs, affording highly distorted molecular frameworks that comprise two figure-eight subunits. Furthermore, we demonstrate that the peripheral functionalization of CBBC with carbazole afforded donor-acceptor-type emitter, which shows thermally activated delayed fluorescence and emits CPL with a g value of 1.0 × 10-2. This g value is ten times higher than those of previously reported chiral TADF-active emitters for circularly polarized organic light-emitting diodes. These results demonstrate that oxidative inner-bond cleavage is a powerful synthetic strategy for creating innovative materials that incorporate molecules with figure-eight structures.

    DOI： 10.1021/jacs.4c07985

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  • Visible-to-UV photon upconversion in metal-free molecular aggregates based on glassy diphenylnaphthalene derivatives Reviewed

    Shun Watanabe, Kiichi Mizukami, Nobuo Kimizuka, Takuma Yasuda

    Journal of Materials Chemistry C   12 ( 29 )   10874 - 10878   2024.7   （ ISSN:2050-7526 eISSN:2050-7534 ）

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Materials Chemistry C  

    Visible-to-ultraviolet photon upconversion (UC) based on triplet-triplet annihilation was demonstrated in metal-free glassy solid films consisting of an organoboron photosensitizer and diphenylnaphthalene-based emitter. Upon photoexcitation at 445 nm, UC emissions in the ultraviolet region (370-390 nm) were observed in binary solid films with high UC efficiencies of up to 2.6% and a threshold excitation intensity as low as 44 mW cm−2

    DOI： 10.1039/d4tc01820f

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  • Bis-Ortho-Donor-Modification of Boracyclic π-Electron Systems beyond Steric Protection to Produce Thermally Activated Delayed Fluorescence Materials Reviewed International journal

    Hiroki Narita, Hyukgi Min, Nanami Kubo, Izumi Hattori, Takuma Yasuda, and Shigehiro Yamaguchi

    Angew. Chem. Int. Ed. 2024, 63, e202405412.   63 ( 30 )   e202405412   2024.5   （ ISSN:1433-7851 eISSN:1521-3773 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Angewandte Chemie - International Edition  

    Polycyclic π-conjugated compounds that contain tricoordinate boron atoms at their periphery represent an attractive class of materials with electron-accepting character. Their molecular design generally requires the introduction of a bulky aryl group onto the boron atom, where it provides predominantly kinetic stabilization. The addition of extra functionality to the aryl group on the boron atom can be expected to further expand the potential utility of this class of materials. Herein, we report the synthesis of a series of boracyclic π-conjugated molecules with firm ortho B⋅⋅⋅N nonbonding interactions by introducing N-containing electron-donors at the ortho-positions of the aryl group on the boron atom. X-ray crystallographic analysis revealed that the combination of a planar boracyclic π-skeleton with only sp2 carbons and a strong electron-donating phenothiazine moiety results in a particularly short B⋅⋅⋅N distance. Theoretical study provided insights into the inherent nature of the B⋅⋅⋅N interaction. Owing to their donor–acceptor (D−A) structures, these molecules exhibit substantially red-shifted fluorescence in solution, albeit that the fluorescence quantum yields (ΦF) are low. In contrast, when incorporated into films, these compounds exhibit thermally activated delayed fluorescence (TADF) with improved ΦF values. Organic light-emitting diodes (OLEDs) fabricated using the ortho-donor-substituted derivatives exhibit orange-red electroluminescence.

    DOI： 10.1002/anie.202405412

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    Other Link： https://onlinelibrary.wiley.com/doi/10.1002/anie.202405412

  • Ultrafast Spin-Flip Exciton Conversion and Narrowband Sky-Blue Luminescence in a Fused Polycyclic Selenaborin Emitter Reviewed International journal

    Sudhir K. Keshri, Guanting Liu, and Takuma Yasuda

    Front. Chem. 2024, 12, 1375552.   12   1375552   2024.3   （ ISSN:2296-2646 eISSN:2296-2646 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Frontiers in Chemistry  

    Thermally activated delayed fluorescence (TADF) materials with high photoluminescence quantum yields and fast reverse intersystem crossing (RISC) capabilities are highly desirable for applications in high-efficiency organic light-emitting diodes. Herein, we report the synthesis as well as structural and photophysical properties of 5,9-diselena-13b-boranaphtho[3,2,1-de]anthracene (SeBSe) as a narrowband-emissive TADF material. The incorporation of two selenium atoms into the boron-fused pentacyclic π-core results in a small singlet–triplet energy gap (ΔEST) and thereby significant TADF properties. Moreover, theoretical calculations revealed a noticeable spin-orbit coupling enhancement between the singlet and triplet manifolds in SeBSe by virtue of the heavy-atom effect of selenium atoms. Consequently, SeBSe allows ultrafast spin-flip RISC with the rate constant surpassing 108 s−1, which far exceeds the corresponding fluorescence radiative decay rate (∼106 s−1), enabling an ideal singlet–triplet superimposed excited state.

    DOI： 10.3389/fchem.2024.1375552

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    Other Link： https://www.frontiersin.org/articles/10.3389/fchem.2024.1375552/full

  • Extended Theoretical Modeling of Reverse Intersystem Crossing for Thermally Activated Delayed Fluorescence Materials Reviewed International journal

    Masaya Hagai, Naoto Inai, Takuma Yasuda, Kazuhiro J. Fujimoto, and Takeshi Yanai

    Science Adv. 2024, 10, eadk3219.   10 ( 5 )   eadk3219   2024.1   （ ISSN:2375-2548 eISSN:2375-2548 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Science Advances  

    Thermally activated delayed fluorescence (TADF) materials and multi-resonant (MR) variants are promising organic emitters that can achieve an internal electroluminescence quantum efficiency of ~100%. The reverse intersystem crossing (RISC) is key for harnessing triplet energies for fluorescence. Theoretical modeling is thus crucial to estimate its rate constant (kRISC) for material development. Here, we present a comprehensive assessment of the theory for simulating the RISC of MR-TADF molecules within a perturbative excited-state dynamics framework. Our extended rate formula reveals the importance of the concerted effects of nonadiabatic spin-vibronic coupling and vibrationally induced spin-orbital couplings in reliably determining kRISC of MR-TADF molecules. The excited singlet-triplet energy gap is another factor influencing kRISC. We present a scheme for gap estimation using experimental Arrhenius plots of kRISC. Erroneous behavior caused by approximations in Marcus theory is elucidated by testing 121 MR-TADF molecules. Our extended modeling offers in-depth descriptions of kRISC

    DOI： 10.1126/sciadv.adk3219

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    Other Link： https://www.science.org/doi/10.1126/sciadv.adk3219

  • Anti-Stokes Luminescence in Multi-Resonance-Type Thermally-Activated Delayed Fluorescence Molecules Reviewed International journal

    Shintaro Kohata, Hajime Nakanotani, Youhei Chitose, Takuma Yasuda, Youichi Tsuchiya, and Chihaya Adachi

    Angew. Chem. Int. Ed. 2023, 62, e202312326.   62 ( 44 )   e202312326   2023.10   （ ISSN:1433-7851 eISSN:1521-3773 ）

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

    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

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    Other Link： https://onlinelibrary.wiley.com/doi/10.1002/anie.202312326

  • A π-extended tercarbazole-core multi-resonance delayed fluorescence emitter exhibiting efficient narrowband yellow electroluminescence Reviewed International journal

    Rajendra Kumar Konidena, Minlang Yang, and Takuma Yasuda

    Chem. Commun. 2023, 59, 10251-10254.   59 ( 68 )   10251 - 10254   2023.7   （ ISSN:1359-7345 eISSN:1364-548X ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Chemical Communications  

    Herein, a simple and versatile molecular design for long-wavelength (>550 nm) multi-resonance thermally activated delayed fluoresence emitters is reported. Extending a fully fused polycyclic π-system with an additional para-N-π-N conjugation induces narrowband bright-yellow photoluminescence and electroluminescence emissions at ∼560 nm.

    DOI： 10.1039/D3CC03241H

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    Other Link： https://pubs.rsc.org/en/content/articlelanding/2023/cc/d3cc03241h

  • Fused polycyclic lactam-based π-conjugated polymers for efficient nonfullerene organic solar cells Reviewed International journal

    Narumi Sato, Sunbin Hwang, Yuichi Tsuchii, and Takuma Yasuda

    Journal of Materials Chemistry A   11 ( 18 )   9840 - 9845   2023.4   （ ISSN:2050-7488 eISSN:2050-7496 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Materials Chemistry A  

    The development of high-performance wide-bandgap polymers has attracted significant attention in recent non-fullerene organic solar cells (NF-OSCs) research, as the expansion of the options of polymer donors that are appropriately matched with nonfullerene acceptors can lead to the further improvement of photovoltaic properties. In this study, two wide-bandgap π-conjugated polymers, namely, P(TPTI-BDT) and P(2DTP-BDT), based on fused pentacyclic bis-lactam and dimeric bis-lactam units, were prepared and used as the donor materials for NF-OSCs with IT-4F as the acceptor. The NF-OSCs based on the P(TPTI-BDT):IT-4F blends outperformed the corresponding P(2DTP-BDT):IT-4F-based devices, achieving high power conversion efficiencies of up to 11.7% without processing additives or post-treatments. Further investigation of the thin-film morphologies using X-ray diffraction and transmission electron microscopy revealed that both P(TPTI-BDT) and P(2DTP-BDT) adopted preferential face-on molecular orientations and formed finely nano-segregated bulk-heterojunction morphologies when blended with IT-4F.

    DOI： 10.1039/D3TA01127E

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    Other Link： https://pubs.rsc.org/en/content/articlelanding/2023/ta/d3ta01127e

  • Indoor photovoltaic energy harvesting based on semiconducting π-conjugated polymers and oligomeric materials toward future IoT applications

    Sunbin Hwang, Takuma Yasuda

    Polymer Journal   55 ( 4 )   297 - 316   2023.4   （ ISSN:0032-3896 eISSN:1349-0540 ）

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    Publisher：Polymer Journal  

    With the advancement of artificial intelligence computing systems that can collect, analyze, and utilize metadata from our activities and surrounding environments, establishing self-powered electronic systems/networks supported by energy harvesters is strongly desired. With the lowering of power consumption in contemporary IoT electronics such as wireless sensors, indoor organic photovoltaic devices (iOPVs), which can be driven under ambient indoor light, have recently attracted significant interest as self-sustainable eco-friendly power sources. iOPVs based on organic semiconductors have unique advantages, such as light weight, flexibility, solution processability, and feasibility of low-temperature mass production. Additionally, the spectral tunability and high optical absorptivity of organic semiconductors make iOPVs more effective as energy harvesters in indoor lighting environments. With recent intensive research effort, iOPVs have realized the delivery of high power conversion efficiencies exceeding 25% with output power densities of several tens to a hundred μW cm−2, which are sufficient to drive various low-power electronics compatible with the IoT. This review article focuses on recent progress in iOPVs based on π-conjugated polymers and oligomeric materials and outlines their fundamental principles and characterization techniques.

    DOI： 10.1038/s41428-022-00727-8

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  • Photovoltaic Properties of π-Conjugated Polymers Based on Fused Cyclic Imide and Amide Skeletons Reviewed International journal

    Yuichi Tsuchii, Taiki Menda, Sunbin Hwang, and Takuma Yasuda

    Bulletin of the Chemical Society of Japan   96 ( 2 )   90 - 94   2023.2   （ ISSN:0009-2673 eISSN:1348-0634 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Bulletin of the Chemical Society of Japan  

    D-A-type π-conjugated polymers, P(BDT-BTI) and P(BDT-BTA) bearing cyclic imide and amide (lactam) moieties, respectively, were designed and synthesized for application in organic photovoltaics (OPV). The introduction of electron-withdrawing imide and amide moieties lowered the HOMO energy levels of the polymers, leading to an increase in the open-circuit voltages of OPV. Complementary photoabsorption over the entire visible range was achieved by combining P(BDT-BTI) and P(BDT-BTA) with a typical non-fullerene acceptor, IT-4F. Unlike P(BDT-BTI), P(BDT-BTA) maintained high crystallinity and retained π-π stacking interactions and face-on orientation in the blend films with IT-4F. Consequently, OPV based on P(BDT-BTA):IT-4F blends achieved power conversion efficiencies as high as 9.6% without any processing additives or post-treatments.

    DOI： 10.1246/bcsj.20220336

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    Other Link： https://www.journal.csj.jp/doi/full/10.1246/bcsj.20220336

  • π-Extended Pyrrole-Fused Heteropine: Synthesis, Properties, and Application in Organic Field-Effect Transistors Reviewed International journal

    Weifan Wang, Fiona Hanindita, Yusei Tanaka, Kotaro Ochiai, Hiroyasu Sato, Yongxin Li, Takuma Yasuda, and Shingo Ito

    Angew. Chem. Int. Ed. 2023, 62, e202218176.   62 ( 8 )   e202218176   2023.2   （ ISSN:1433-7851 eISSN:1521-3773 ）

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    Sulfur-embedded polycyclic aromatic compounds have been used as building blocks for numerous organic semiconductors over the past few decades. While the success is based on thiophene-containing compounds, aromatic compounds that contain thiepine, a sulfur-containing seven-membered-ring arene, has been less well investigated. Here we report the synthesis and properties of π-extended pyrrole-fused heteropine compounds such as thiepine and oxepine. A π-extended pyrrole-fused thiepine exhibited a “pitched π-stacking” structure in the crystal, and exhibited a high charge carrier mobility of up to 1.0 cm2 V−1 s−1 in single-crystal field-effect transistors.

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  • Narrowband Emissive Thermally Activated Delayed Fluorescence Materials

    Hyung Jong Kim, Takuma Yasuda

    Advanced Optical Materials   10 ( 22 )   2022.11   （ ISSN:2195-1071 eISSN:2195-1071 ）

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    Organic thermally activated delayed fluorescence (TADF) materials have attracted significant research interest in the field of organic electronics because of their inherent advantage of 100% exciton utilization capability in organic light-emitting diodes (OLEDs) without the use of noble metals. However, despite their high internal electroluminescence quantum efficiencies approaching unity, broad emission spectra with sizable full width at half maxima (FWHM; 60–100 nm) present a critical issue that must be solved for their application in ultrahigh-definition OLED displays. Recently, a new paradigm of TADF materials featuring the multiple resonance (MR) effect based on heteroatom-doped polycyclic aromatic frameworks, referred to as MR-TADF materials, has emerged and garnered considerable research interest owing to their remarkable features of efficient narrowband emissions with extremely small FWHMs (≤30 nm). Currently, MR-TADF materials occupy a prominent position in the cutting-edge research on organic light-emitting materials from both chemical and physical perspectives. This review article focuses on recent progress in narrowband emissive MR-TADF systems from the perspective of molecular design, photophysical properties, and electroluminescence performance in OLEDs. The current status and future prospects of this advanced material technology are discussed comprehensively.

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  • Facile Dimerization Strategy for Producing Narrowband Green Multi-Resonance Delayed Fluorescence Emitters Reviewed International journal

    Minlang Yang, Rajendra Kumar Konidena, So Shikita, and Takuma Yasuda

    Journal of Materials Chemistry C   11 ( 3 )   917 - 922   2022.11   （ ISSN:2050-7526 eISSN:2050-7534 ）

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    Establishing a simple molecular design strategy for enabling redshifted emissions while maintaining high color purity in multi-resonance thermally activated delayed fluorescence (MR-TADF) remains a crucial yet challenging task. Herein, we introduce a new design concept based on a dimerization strategy for constructing pure green MR-TADF emitters. Two isomeric MR dimers, namely p-CzB and m-CzB, were developed by tethering two MR fragments through different linking positions. The interconnection mode between the two MR fragments in these dimeric MR-TADF systems plays a vital role in regulating photophysical properties as well as exciton dynamics. Comprehensive photophysical and computational studies revealed that m-CzB exhibits superior green MR-TADF characteristics compared to p-CzB. A m-CzB-based organic light-emitting diode (OLED) delivered pure green electroluminescence with CIE coordinates of (0.20, 0.70), a maximum external quantum efficiency of 23.5%, and alleviated efficiency roll-off.

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  • Ultrafast Triplet–Singlet Exciton Interconversion in Narrowband Blue Organoboron Emitters Doped with Heavy Chalcogens Reviewed International journal

    In Seob Park, Hyukgi Min, and Takuma Yasuda

    Angew. Chem. Int. Ed. 2022, 61, e202205684.   61 ( 31 )   e202205684   2022.8   （ ISSN:1433-7851 eISSN:1521-3773 ）

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    A selenium-doped polycyclic organoboron emitter exhibits ultrafast triplet–singlet exciton interconversion ability in addition to strong narrowband blue emission. Its spin-flip reverse intersystem crossing (RISC) rate exceeds 108 s−1 (100 million times spin inversion per second), enabling superimposed fluorescence with full exciton utilization. This breakthrough shatters the stereotypical physicochemical views of conventional thermally activated delayed fluorescence limited by slow RISC.

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  • Blue Thermally Activated Delayed Fluorescence with Sub-Microsecond Short Exciton Lifetimes: Acceleration of Triplet-Singlet Spin Interconversion via Quadrupolar Charge-Transfer States Reviewed International journal

    Hyukgi Min, In Seob Park, and Takuma Yasuda

    Adv. Optical Mater. 2022, 10, 2200290.   10 ( 13 )   2022.7   （ ISSN:2195-1071 ）

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    Exciton lifetime is a critical factor in determining the performance of optoelectronic functional systems and devices. Thermally activated delayed fluorescence (TADF) emitters that can concurrently achieve a high fluorescence quantum yield and short exciton lifetime are desirable for application in organic light-emitting diodes (OLEDs) with suppressed efficiency roll-off. Herein, phenoxaborin and xanthone-cored TADF emitters with quadrupolar electronic structures are reported to exhibit sub-microsecond TADF lifetimes as short as 650 and 970 ns, respectively, while preserving high fluorescence quantum yields. By extending the El-Sayed rule to the quadrupolar π-systems, the contribution of doubly degenerate charge-transfer excited states induced by dual donor units can enhance the spin–orbit coupling between them, leading to a spin-flip acceleration between the excited triplet and singlet states. This electronic feature is advantageous for mitigating exciton annihilation processes in the emission layer, thereby reducing the efficiency roll-offs in OLEDs. Consequently, a high external electroluminescence quantum efficiency over 20% can be retained, even under operating the device at a high luminance of 1000 cd m−2.

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  • Axially chiral 1,1 '-bicarbazolyls with near-ultraviolet circularly polarized luminescence Reviewed International journal

    So Shikita, Takunori Harada, and Takuma Yasuda

    Chem. Commun. 2022, 58, 4849-4852.   58 ( 31 )   4849 - 4852   2022.3   （ ISSN:1359-7345 eISSN:1364-548X ）

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    The facile synthesis and chiroptical properties of a new family of circularly polarized luminescence (CPL) materials, axially chiral 1,1′-bicarbazolyls (BiCz), are reported. The BiCz derivatives emitted intense near-ultraviolet photoluminescence, with a peak at ∼380 nm. The BiCz enantiomers showed mirror-image circular dichroism and CPL, with glum values on the order of 10−4 in solution.

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  • Achieving Ultimate Narrowband and Ultrapure Blue Organic Light-Emitting Diodes Based on Polycyclo-Heteraborin Multi-Resonance Delayed Fluorescence Emitters Reviewed International journal

    In Seob Park, Minlang Yang, Hiromoto Shibata, Natsuki Amanokura, and Takuma Yasuda

    Adv. Mater. 2022, 34, 2107951.   34 ( 9 )   e2107951   2021.12   （ ISSN:0935-9648 eISSN:1521-4095 ）

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    To achieve an ultimate wide color gamut for ultrahigh-definition displays, there is great demand for the development of organic light-emitting diodes (OLEDs) enabling monochromatic, ultrapure blue electroluminescence (EL). Herein, high-efficiency and ultrapure blue OLEDs based on polycyclo-heteraborin multi-resonance thermally activated delayed fluorescence (MR-TADF) materials, BOBO-Z, BOBS-Z, and BSBS-Z, are reported. The key to the design of the present luminophores is the exquisite combination and interplay of multiple boron, nitrogen, oxygen, and sulfur heteroatoms embedded in a fused polycyclic π-system. Comprehensive photophysical and computational investigations of this family of MR-TADF materials reveal that the systematic implementation of chalcogen (oxygen and sulfur) atoms can finely modulate the emission color while maintaining a narrow bandwidth, as well as the spin-flipping rates between the excited singlet and triplet states. Consequently, OLEDs based on BOBO-Z, BOBS-Z, and BSBS-Z demonstrate narrowband and ultrapure blue EL emission, with peaks at 445–463 nm and full width at half maxima of 18–23 nm, leading to Commission Internationale de l'Éclairage-y coordinates in the range of 0.04–0.08. Particularly, for OLEDs incorporating sulfur-doped BOBS-Z and BSBS-Z, notably high maximum external EL quantum efficiencies of 26.9% and 26.8%, respectively, and small efficiency roll-offs are achieved concurrently.

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  • Ester-Functionalized Thermally Activated Delayed Fluorescence Materials Reviewed International journal

    Hiroshi Tasaki, So Shikita, In Seob Park, and Takuma Yasuda

    J. Mater. Chem. C 2022, 10, 4574-4578.   10 ( 12 )   4574 - 4578   2021.11   （ ISSN:2050-7526 eISSN:2050-7534 ）

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    DOI： 10.1039/D1TC04933J

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  • An S-Shaped Thienoacene Semiconductor Forming Unique Cruciform Lamellar Packing via a 2D Interaction Network of π-Stacking and Chalcogen Bonding Reviewed International journal

    Tatsuya Mori, Yuji Yamaguchi, So Kawata, and Takuma Yasuda

    J. Mater. Chem. C 2021, 9, 13090-13093.   2021.9

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    DOI： 10.1039/D1TC03871K

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  • Deep-Blue OLEDs Based on Organoboron–Phenazasiline-Hybrid Delayed Fluorescence Emitters Concurrently Achieving 30% External Quantum Efficiency and Small Efficiency Roll-Off Reviewed International journal

    In Seob Park, Hyukgi Min, Jong Uk Kim, and Takuma Yasuda

    Adv. Optical Mater. 2021, 9, 2101282.   2021.9

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    DOI： 10.1002/adom.202101282

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  • Wide-Range Color Tuning of Narrowband Emissions in Multi-Resonance Organoboron Delayed Fluorescence Materials through Rational Imine/Amine Functionalization Reviewed International journal

    Minlang Yang, So Shikita, Hyukgi Min, In Seob Park, Hiromoto Shibata, Natsuki Amanokura, and Takuma Yasuda

    Angew. Chem. Int. Ed. 2021, 60, 23142-23147.   2021.8

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    DOI： 10.1002/anie.202109335

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  • Fused-Nonacyclic Multi-Resonance Delayed Fluorescence Emitter Based on Ladder-Thiaborin Exhibiting Narrowband Sky-Blue Emission with Accelerated Reverse Intersystem Crossing Reviewed International journal

    Masakazu Nagata, Hyukgi Min, Erika Watanabe, Hiroki Fukumoto, Yoshiyuki Mizuhata, Norihiro Tokitoh, Tomohiro Agou, and Takuma Yasuda

    Angew. Chem. Int. Ed. 2021, 60, 20280-20285.   2021.7

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    DOI： 10.1002/anie.202108283

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  • Alternating Donor–Acceptor π-Conjugated Macrocycle Exhibiting Efficient Thermally Activated Delayed Fluorescence and Spontaneous Horizontal Molecular Orientation Reviewed International journal

    So Shikita, Go watanabe, Dai Kanouchi, Junya Saito, and Takuma Yasuda

    Adv. Photonics Res. 2021, 2, 2100021.   2021.3

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    DOI： 10.1002/adpr.202100021

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  • Thermal Equilibration between Singlet and Triplet Excited States in Organic Fluorophore for Submicrosecond Delayed Fluorescence Reviewed International journal

    Naoya Aizawa, Akinobu Matsumoto, and Takuma Yasuda

    Science Adv. 2021, 7, eabe5769.   2021.2

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    DOI： 10.1126/sciadv.abe5769

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  • Phenyl-Triggered Photophysical Switching between Normal Fluorescence and Delayed Fluorescence in Phthalonitrile-Based Luminophores Reviewed International journal

    In Seob Park, Hyukgi Min, and Takuma Yasuda

    Aggregate 2021, 2, 145-150.   2021.1

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    DOI： 10.1002/agt2.14

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  • U-Shaped Heteroacenes Embedded with Heavy Chalcogen Atoms: Unique Bilayer Self-Organization of Crooked π-Cores Enabling Efficient Charge Transport Reviewed International journal

    Tatsuya Mori and Takuma Yasuda

    Adv. Electron. Mater. 2021, 7, 2001052.   2021.1

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    DOI： 10.1002/aelm.202001052

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  • cis-Quinacridone-Based Delayed Fluorescence Emitters: Seemingly Old but Renewed Functional Luminogens Reviewed International journal

    Hyukgi Min, In Seob Park, and Takuma Yasuda

    Angew. Chem. Int. Ed. 2021, 60, 7643-7648.   2021.1

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    DOI： 10.1002/anie.202016914

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  • Regiocontrolled Synthesis of Ester-Functionalized Polythiophenes via Direct Arylation Polycondensation Reviewed International journal

    Taiki Menda, Tatsuya Mori, and Takuma Yasuda

    Polym. J. 2021, 53、403-408.   2020.12

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    DOI： 10.1038/s41428-020-00421-7

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  • Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics Reviewed International journal

    Minlang Yang, In Seob Park, and Takuma Yasuda

    J. Am. Chem. Soc. 2020, 142, 19468-19472.   2020.11

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    DOI： 10.1021/jacs.0c10081

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  • Solution-Processable Organic Semiconductors Featuring S-Shaped Dinaphthothienothiophene (S-DNTT): Effects of Alkyl Chain Length on Self-Organization and Carrier Transport Properties Reviewed International journal

    Yuji Yamaguchi, Yuka Kojiguchi, So Kawata, Tatsuya Mori, Kazuo Okamoto, Masanori Tsutsui, Tomoyuki Koganezawa, Hiroshi Katagiri, and Takuma Yasuda

    Chem. Mater. 2020, 32, 5350-5360.   2020.5

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    DOI： 10.1021/acs.chemmater.0c01740

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  • Mechanochromic Delayed Fluorescence Switching in Propeller‐Shaped Carbazole–Isophthalonitrile Luminogens with Stimuli‐Responsive Intramolecular Charge‐Transfer Excited States Reviewed International journal

    Minlang Yang, In Seob Park, Yasuhiro Miyashita, Katsunori Tanaka, Takuma Yasuda

    Angew. Chem. Int. Ed. 2020, 59, 13955-13961.   2020.5

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    DOI： 10.1002/anie.202005584

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  • A Liquid-Crystalline Semiconducting Polymer Based on Thienylene–Vinylene–Thienylene: Enhanced Hole Mobilities by Mesomorphic Molecular Ordering and Thermoplastic Shape-Deformable Characteristics Reviewed International journal

    Tatsuya Mori, Hideaki Komiyama, Takahiro Ihikawa, Takuma Yasuda

    Polym. J. 2020, 52, 313-321.   2020.2

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    DOI： 10.1038/s41428-019-0282-4

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  • Pentacyclic Ladder-Heteraborin Emitters Exhibiting High-Efficiency Blue Thermally Activated Delayed Fluorescence with an Ultrashort Emission Lifetime Reviewed International journal

    Tomohiro Agou, Kyohei Matsuo, Rei Kawano, In Seob Park, Takaaki Hosoya, Hiroki Fukumoto, Toshio Kubota, Yoshiyuki Mizuhata, Norihiro Tokitoh, Takuma Yasuda

    ACS Mater. Lett. 2020, 2, 28-34.   2019.11

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    DOI： 10.1021/acsmaterialslett.9b00433

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  • Dipolar and Quadrupolar Luminophores Based on 1,8‐Dimethylcarbazole−Triazine Conjugates for High‐Efficiency Blue Thermally Activated Delayed Fluorescence OLEDs Reviewed International journal

    Hyukgi Min, In Seob Park, Takuma Yasuda

    ChemPhotoChem 2020, 4, 82-88.   2019.10

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    DOI： 10.1002/cptc.201900186

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  • Blue Thermally Activated Delayed Fluorescence Emitters Incorporating Acridan Analogues with Heavy Group 14 Elements for High-Efficiency Doped and Non-Doped OLEDs Reviewed International journal

    Kyohei Matsuo, Takuma Yasuda

    Chem. Sci. 2019, 10, 10687-10697.   2019.10

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    DOI： 10.1039/C9SC04492B

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  • Organic Energy-Harvesting Devices Achieving Power Conversion Efficiencies over 20% under Ambient Indoor Lighting Reviewed International journal

    Ryota Arai, Seiichi Furukawa, Narumi Sato, Takuma Yasuda

    J. Mater. Chem. A 2019, 7, 20187-20192.   2019.8

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    DOI： 10.1039/C9TA06694B

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  • Strategic End-Halogenation of π-Conjugated Small Molecules Enabling Fine Morphological Control and Enhanced Performance of Organic Solar Cells Reviewed International journal

    Seiichi Furukawa, Takuma Yasuda

    J. Mater. Chem. A 2019, 7, 14806-14815.   2019.5

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    DOI： 10.1039/C9TA03869H

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  • High-Performance Organic Energy-Harvesting Devices and Modules for Self-Sustainable Power Generation under Ambient Indoor Lighting Environments Reviewed International journal

    Ryota Arai, Seiichi Furukawa, Yu Hidaka, Hideaki Komiyama, Takuma Yasuda

    ACS Appl. Mater. Interfaces 2019, 11, 9259-9264.   2019.2

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    DOI： 10.1021/acsami.9b00018

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  • Boronate- and Borinate-Based π-Systems for Blue Thermally Activated Delayed Fluorescence Materials Reviewed International journal

    Kyohei Matsuo, Takuma Yasuda

    Chem. Commun. 2019, 55, 2501-2504.   2019.2

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    DOI： 10.1039/C8CC10282A

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  • High-Crystallinity π-Conjugated Small Molecules Based on Thienylene-Vinylene-Thienylene: Critical Role of Self-Organization in Photovoltaic, Charge-Transport, and Morphological Properties Reviewed International journal

    Seiichi Furukawa, Hideaki Komiyama, Naoya Aizawa, Takuma Yasuda

    ACS Appl. Mater. Interfaces 2018, 10, 42756-42765.   2018.11

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    DOI： 10.1021/acsami.8b17056

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  • Modulating Photo- and Electroluminescence in a Stimuli-Responsive π-Conjugated Donor–Acceptor Molecular System Reviewed International journal

    Kohei Isayama, Naoya Aizawa, Jun Yun Kim, Takuma Yasuda

    Angew. Chem. Int. Ed. 2018, 57, 11982-11986.   2018.9

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    DOI： 10.1002/anie.201806863

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  • High-Performance Dibenzoheteraborin-Based Thermally Activated Delayed Fluorescence Emitters: Molecular Architectonics for Concurrently Achieving Narrow-Band Emission and Efficient Triplet–Singlet Spin Conversion Reviewed International journal

    In Seob Park, Kyohei Matsuo, Naoya Aizawa, Takuma Yasuda

    Adv. Funct. Mater. 2018, 28, 1802031.   2018.8

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    DOI： 10.1002/adfm.201802031

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  • Oligothiophene–Indandione-Linked Narrow-Band Gap Molecules: Impact of π-Conjugated Chain Length on Photovoltaic Performance Reviewed International journal

    Hideaki Komiyama, Takahiro To, Seiichi Furukawa, Yu Hidaka, Woong Shin, Takahiro Ichikawa, Ryota Arai, Takuma Yasuda

    ACS Appl. Mater. Interfaces 2018, 10, 11083-11093.   2018.5

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    DOI： 10.1021/acsami.8b01233

  • High-Mobility Regioisomeric Thieno[f,f‘]bis[1]benzothiophenes: Remarkable Effect of Syn/Anti Thiophene Configuration on Optoelectronic Properties, Self-Organization, and Charge-Transport Functions in Organic Transistors Reviewed International journal

    Tatsuya Oyama, Tatsuya Mori, Tomohiro Hashimoto, Muneaki Kamiya, Takahiro Ichikawa, Hideaki Komiyama, Yu Seok Yang, Takuma Yasuda

    Adv. Electron. Mater. 2018, 4, 1700390.   2018.5

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  • Highly Efficient Red–Orange Delayed Fluorescence Emitters Based on Strong π-Accepting Dibenzophenazine and Dibenzoquinoxaline Cores: Toward a Rational Pure-Red OLED Design Reviewed International journal

    Ryuhei Furue, Kyohei Matsuo, Yasuhiko Ashikari, Hirohito Ooka, Natsuki Amanokura, Takuma Yasuda

    Adv. Optical Mater. 2018, 6, 1701147.   2018.5

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  • Molecular Engineering of Phosphacycle-Based Thermally Activated Delayed Fluorescence Materials for Deep-Blue OLEDs Reviewed International journal

    Jiyoung Lee, Naoya Aizawa, Takuma Yasuda

    J. Mater. Chem. C 2018, 6, 3578-3583.   2018.5

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    DOI： 10.1039/C7TC05709A

  • Isobenzofuranone- and Chromone-Based Blue Delayed Fluorescence Emitters with Low Efficiency Roll-Off in Organic Light-Emitting Diodes Reviewed International journal

    Jiyoung Lee, Naoya Aizawa, Takuma Yasuda

    Chem. Mater. 2017, 29, 8012-8020.   2017.5

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    DOI： 10.1021/acs.chemmater.7b03371

  • Aggregation-Induced Delayed Fluorescence from Phenothiazine-Containing Donor–Acceptor Molecules for High-Efficiency Non-Doped Organic Light-Emitting Diodes Reviewed International journal

    Naoya Aizawa, Chao-Jen Tsou, In Seob Park, Takuma Yasuda

    Polym. J. 2017, 49, 197-202.   2017.5

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    DOI： 10.1038/pj.2016.82

  • Pyrimidine-Based Twisted Donor–Acceptor Delayed Fluorescence Molecules: A New Universal Platform for Highly Efficient Blue Electroluminescence Reviewed International journal

    In Seob Park, Hideaki Komiyama, Takuma Yasuda

    Chem. Sci. 2017, 8, 953-960.   2017.5

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    DOI： 10.1039/C6SC03793C

  • Versatile Molecular Functionalization for Inhibiting Concentration Quenching of Thermally Activated Delayed Fluorescence Reviewed International journal

    Jiyoung Lee, Naoya Aizawa, Masaki Numata, Chihaya Adachi, Takuma Yasuda

    Adv. Mater. 2017, 29, 1604856.   2017.5

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    DOI： 10.1002/adma.201604856

  • Thermally Activated Delayed Fluorescence Properties of Regioisomeric Xanthone-Based Twisted Intramolecular Charge-Transfer Luminophores Reviewed International journal

    Jiyoung Lee, In Seob Park, Takuma Yasuda

    Bull. Chem. Soc. Jpn. 2017, 90, 231-236.   2017.5

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

    DOI： 10.1246/bcsj.20160380

  • Cyclohexane-Coupled Bipolar Host Materials with High Triplet Energies for Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence Reviewed International journal

    In Seob Park, Hongwook Seo, Hiroki Tachibana, Joung Uk Kim, Jinbo Zhang, Se Mo Son, Takuma Yasuda

    ACS Appl. Mater. Interfaces 2017, 9, 2693-2700.   2017.5

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    DOI： 10.1021/acsami.6b13002

  • Tunable Full-Color Electroluminescence from All-Organic Optical Upconversion Devices by Near-Infrared Sensing Reviewed International journal

    Hiroki Tachibana, Naoya Aizawa, Yu Hidaka, Takuma Yasuda

    ACS Photonics 2017, 4, 223-227.   2017.5

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    DOI： 10.1021/acsphotonics.6b00964

  • Effects of Chalcogen Atom Substitution on the Optoelectronic and Charge-Transport Properties in Picene-Type π-Systems Reviewed International journal

    Tatsuya Oyama, Yu Seok Yang, Kyohei Matsuo, Takuma Yasuda

    Chem. Commun. 2017, 53, 3814-3817.   2017.5

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    DOI： 10.1039/C7CC01292F

  • Solution-Grown Unidirectionally Oriented Crystalline Thin Films of a U-Shaped Thienoacene-Based Semiconductor for High-Performance Organic Field-Effect Transistors Reviewed International journal

    Tatsuya Mori, Tatsuya Oyama, Hideaki Komiyama, Takuma Yasuda

    J. Mater. Chem. C 2017, 5, 5872-5876.   2017.5

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    DOI： 10.1039/C7TC01836C

  • Enhancing Thermally Activated Delayed Fluorescence Characteristics by Intramolecular B–N Coordination in a Phenylpyridine-Containing Donor–Acceptor π-System Reviewed International journal

    Kyohei Matsuo, Takuma Yasuda

    Chem. Commun. 2017, 53, 8723-8726.   2017.5

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    DOI： 10.1039/C7CC04875K

  • Spin-Dependent Exciton Funneling to a Dendritic Fluorophore Mediated by a Thermally Activated Delayed Fluorescence Material as an Exciton-Harvesting Host Reviewed International journal

    Naoya Aizawa, So Shikita, Takuma Yasuda

    Chem. Mater. 2017, 29, 7014-7022.   2017.5

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    DOI： 10.1021/acs.chemmater.7b02606

  • Controlling Open-Circuit Voltage in Organic Solar Cells by Terminal Fluoro-Functionalization of Narrow-Bandgap π-Conjugated Molecules Reviewed International journal

    Seiichi Furukawa, Hideaki Komiyama, Takuma Yasuda

    J. Phys. Chem. C 2016, 120, 21235-21241.   2016.5

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    DOI： 10.1021/acs.jpcc.6b06758

  • High-Performance Blue Organic Light-Emitting Diodes with 20% External Quantum Efficiency Based on Pyrimidine-Containing Thermally Activated Delayed Fluorescence Emitters Reviewed International journal

    In Seob Park, Jiyoung Lee, Takuma Yasuda

    J. Mater. Chem. C 2016, 4, 7911-7916.   2016.5

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    DOI： 10.1039/C6TC02027E

  • Aggregation-Induced Delayed Fluorescence Based on Donor/Acceptor-Tethered Janus Carborane Triads: Unique Photophysical Properties for Non-Doped OLEDs Reviewed International journal

    Ryuhei Furue, Takuro Nishimoto, In Seob Park, Jiyoung Lee, Takuma Yasuda

    Angew. Chem. Int. Ed. 2016, 55, 7171-7175.   2016.3

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    DOI： 10.1002/anie.201603232

  • A Phenazaborin-Based High-Efficiency Blue Delayed Fluorescence Material Reviewed International journal

    In Seob Park, Masaki Numata, Chihaya Adachi, Takuma Yasuda

    Bull. Chem. Soc. Jpn. 2016, 89, 375-377.   2016.3

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    DOI： 10.1246/bcsj.20150399

  • Full-Color Delayed Fluorescence Materials Based on Wedge-Shaped Phthalonitriles and Dicyanopyrazines: Systematic Design, Tunable Photophysical Properties, and OLED Performance Reviewed International journal

    In Seob Park, Sae Youn Lee, Chihaya Adachi, Takuma Yasuda

    Adv. Funct. Mater. 2016, 26, 1813-1821.   2016.3

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    DOI： 10.1002/adfm.201505106

  • Thermally Activated Delayed Fluorescence Polymers for Efficient Solution-Processed Organic Light-Emitting Diodes Reviewed International journal

    Sae Youn Lee, Takuma Yasuda, Hideaki Komiyama, Jiyoung Lee, Chihaya Adachi

    Adv. Mater. 2016, 28, 4019-4024.   2016.3

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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 International journal

    Sae Youn Lee, Chihaya Adachi, Takuma Yasuda

    Adv. Mater. 2016, 28, 4626-4631.   2016.3

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    DOI： 10.1002/adma.201506391

  • 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. Commun. 2015, 51, 9443-9446.   2015.4

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  • 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 2015, 4, 2175–2181.   2015.4

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  • Nearly 100% Internal Quantum Efficiency in Undoped Electroluminescent Devices Employing Pure Organic Emitters Reviewed International journal

    Qisheng Zhang, Daniel Tsang, Hirokazu Kuwabara, Yasuhiro Hatae, Bo Li, Takehiro Takahashi, Sae Youn Lee, Takuma Yasuda, Chihaya Adachi

    Adv. Mater. 2015, 27, 2096–2100.   2015.4

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  • pi-Extended Narrow-Bandgap Diketopyrrolopyrrole-Based Oligomers for Solution-Processed Inverted Organic Solar Cells Reviewed International journal

    Woong Shin, Takuma Yasuda, Yu Hidaka, Go Watanabe, Ryota Arai, Keiro Nasu, Takahiro Yamaguchi, Wakako Murakami, Kengo Makita, CHIHAYA ADACHI

    Adv. Energy Mater. 2014, 4, 1400879.   2014.4

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  • 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. 2014, 53, 6402–6406.   2014.4

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  • 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 International journal

    Yu Seok Yang, Takuma Yasuda, Hayato Kakizoe, Hiroyuki Mieno, Hiori Kino, Yoshitaka Tateyama, CHIHAYA ADACHI

    Chem. Commun. 2013, 49, 6483-6485.   2013.6

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  • Self-Organizing Mesomorphic Diketopyrrolopyrrole Derivatives for Efficient Solution-Processed Organic Solar Cells Reviewed International journal

    Woong Shin, Takuma Yasuda, Go Watanabe, Yu Seok Yang, CHIHAYA ADACHI

    Chem. Mater. 2013, 25, 2549-2556.   2013.6

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  • Bifunctional Star-Burst Amorphous Molecular Materials for OLEDs: Achieving Highly Efficient Solid-State Luminescence and Carrier Transport Induced by Spontaneous Molecular Orientation Reviewed International journal

    Jun Yun Kim, Yasuda Takuma, Yu Seok Yang, ADACHI CHIHAYA

    Adv. Mater. 2013, 25, 2666-2671.   2013.3

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  • Organic Single-Crystal Transistors Based on pi-Extended Heteroheptacene Microribbons Reviewed International journal

    Yu Seok Yang, Yasuda Takuma, ADACHI CHIHAYA

    Bull. Chem. Soc. Jpn. 2012, 85, 1186-1191.   85   2012.10

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  • Highly Luminescent pi-Conjugated Dithienometalloles: Photophysical Properties and Their Application in Organic Light-Emitting Diodes Reviewed International journal

    Ryosuke Kondo, Takuma Yasuda,* Yu Seok Yang, Jun Yun Kim, and Chihaya Adachi*

    J. Mater. Chem. 2012, 22, 16810-16816   22   2012.7

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    DOI： 10.1039/c2jm33526c

  • Electro-Functional Octupolar π-Conjugated Columnar Liquid Crystals Reviewed International journal

    Takuma Yasuda, Tomohiro Shimizu, Feng Liu, Goran Ungar, and Takashi Kato

    J. Am. Chem. Soc. 2011, 133, 13437-13444.   133   2011.11

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  • A Redox-Switchable [2]Rotaxane in a Liquid-Crystalline State Reviewed International journal

    Takuma Yasuda, Kana Tanabe, Toru Tsuji, Karla K. Coti, Ivan Aprahamian, J. Fraser Stoddart, and Takashi Kato

    Chem. Commun. 2010, 46, 1224–1226.   46   2010.5

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    レドックスによる液晶性分子マシンの駆動と色調変化に関する研究である。

  • Truxene-Based Columnar Liquid Crystals: Self-Assembled Structures and Electro-Active Properties Reviewed International journal

    Kyosuke Isoda, Takuma Yasuda, and Takashi Kato

    Chem. Asian J. 2009, 4, 1619–1625.   4   2009.6

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  • π-Conjugated Oligothiophene-Based Polycatenar Liquid Crystals: Self-Organization and Photoconductive, Luminescent, and Redox Properties Reviewed International journal

    Takuma Yasuda, Hirotaka Ooi, Jun Morita, Yusuke Akama, Kiyoshi Minoura, Masahiro Funahashi, Takeshi Shimomura, and Takashi Kato

    Adv. Funct. Mater. 2009, 19, 411–419.   19   2008.12

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  • New Luminescent 1,2,4-Triazole/Thiophene Alternating Copolymers: Synthesis, Characterization, and Optical Properties Reviewed International journal

    Takuma Yasuda, Kimiyasu Namekawa, Takayuki Iijima, and Takakazu Yamamoto

    Polymer 2007, 48, 4375–4384.   48   2007.5

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  • A Liquid-Crystalline Bistable [2]Rotaxane Reviewed International journal

    Ivan Aprahamian, Takuma Yasuda, Taichi Ikeda, Sourav Saha, William R. Dichtel, Kyosuke Isoda, Takashi Kato, and J. Fraser Stoddart

    Angew. Chem. Int. Ed. 2007, 46, 4675–4679.   46   2007.5

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  • Columnar Liquid Crystalline π-Conjugated Oligothiophenes Reviewed International journal

    Takuma Yasuda, Kenji Kishimoto, and Takashi Kato

    Chem. Commun. 2006, 3399–3401.   2006.7

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  • New Coplanar (ABA)n-Type Donor-Acceptor π-Conjugated Copolymers Constituted of Alkylthiophene and Pyridazine: Synthesis Using Hexamethylditin, Self-Organized Solid Structure, and Optical and Electrochemical Properties of the Copolymers Reviewed International journal

    Takuma Yasuda, Yoshimasa Sakai, Shinji Aramaki, and Takakazu Yamamoto

    Chem. Mater. 2005, 17, 6060–6068.   17   2005.11

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  • Ambipolar Field-Effect Transistor (FET) and Redox Characteristics of a π-Conjugated Thiophene/1,3,4-Thiadiazole CT-Type Copolymer Reviewed International journal

    Takakazu Yamamoto, Takuma Yasuda, Yoshimasa Sakai, and Shinji Aramaki

    Macromol. Rapid Commun. 2005, 26, 1214–1217.   26   2005.8

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  • Synthesis, Characterization, and Optical and Electrochemical Properties of New 2,1,3-Benzoselenadiazole-Based CT-Type Copolymers Reviewed International journal

    Takuma Yasuda, Tatsuya Imase, and Takakazu Yamamoto

    Macromolecules 2005, 38, 7378–7385.   38   2005.7

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  • New Alternative Donor-Acceptor Arranged Poly(Aryleneethynylene)s and Their Related Compounds Composed of Five-Membered Electron-Accepting 1,3,4-Thiadiazole, 1,2,4-Triazole, or 3,4-Dinitrothiophene Units: Synthesis, Packing Structure, and Optical Properties Reviewed International journal

    Takuma Yasuda, Tatsuya Imase, Yoshiyuki Nakamura, and Takakazu Yamamoto

    Macromolecules 2005, 38, 4687–4697.   38   2005.4

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  • Synthesis, Solid Structure, and Optical Properties of New Thiophene-Based Alternating π-Conjugated Copolymers Containing 4-Alkyl-1,2,4-triazole or 1,3,4-Thiadiazole Unit as the Partner Unit Reviewed International journal

    Takuma Yasuda, Tatsuya Imase, Shintaro Sasaki, and Takakazu Yamamoto

    Macromolecules 2005, 38, 1500–1503.   38   2005.1

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  • Interior and Exterior Boron Doping in Functional Azacalixarenes Triggering Narrowband Delayed Fluorescence

    Keshri, SK; Nomura, H; Yasuda, T

    ADVANCED OPTICAL MATERIALS   2025.5   （ ISSN:2195-1071 ）

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    The development of high-performance organoboron luminophores with narrowband emission capabilities is desirable for advancing organic light-emitting diodes (OLEDs). Here, a unique regioselective interior/exterior borylation strategy is introduced for macrocyclic azacalix[3]arenes, enabling the synthesis of two distinct organoboron luminophores with narrowband thermally activated delayed fluorescence (TADF). By applying two different one-shot borylation conditions, we selectively obtain (i) internally borylated in-B-ACCz, which exhibits narrowband violet TADF, and (ii) externally borylated ex-B-ACCz, which achieves narrowband blue TADF with an exceptionally high photoluminescence quantum yield approaching 100%. Furthermore, OLEDs utilizing ex-B-ACCz demonstrate narrowband blue electroluminescence with a maximum external quantum efficiency of 23.1%. This study offers valuable insights into the design and synthesis of novel organoboron luminophores and photofunctional π-conjugated macrocycles.

    DOI： 10.1002/adom.202501193

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  • Transformation of benzocorrole isomer into pyrrole-containing polycyclic molecules via copper-mediated cleavage and annulation

    Biju Basumatary, Sawako Yada, Shunsuke Oka, Shigeki Mori, Tatsuya Mori, Tatsuki Abe, Daisuke Kawaguchi, Takuma Yasuda, Hiroyuki Furuta, Masatoshi Ishida

    Organic Chemistry Frontiers   12 ( 3 )   717 - 724   2025.1   （ ISSN:2052-4129 eISSN:2052-4129 ）

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    We present the oxidative transformation of a corrole isomer, namely, dibenzocorrorin (3), featuring a modified connectivity pattern of bipyrrole moieties within the corrole scaffold, resulting in the formation of pyrrole-embedded...

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  • Aluminum Complex-Core Carbazole Dendrimers Exhibiting Thermally Activated Delayed Fluorescence

    Kohei Nakao, Minori Furukori, Guanting Liu, Takuya Hosokai, Takuma Yasuda, Ken Albrecht

    ACS Applied Optical Materials   2 ( 7 )   1393 - 1402   2024.7   （ ISSN:2771-9855 eISSN:2771-9855 ）

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    Carbazole dendrimers are promising materials for realizing highly efficient solution-processed organic light-emitting diodes (OLEDs). Merging carbazole dendrimers with a light-metal complex enables the development of solution-processable materials with excellent optical properties. In this work, highly luminescent Al complexes with carbazole-based dendritic ligands were developed. Metal complexation enhances photoluminescence quantum yields (PLQYs) and thermally activated delayed fluorescence (TADF) properties compared with the corresponding dendritic ligands. Consequently, the Al complex containing symmetric dendritic ligands exhibited a high PLQY of 70% with a delayed fluorescence lifetime of 16 μs in the doped film. Solution-processed OLEDs using these Al complexes as emitters exhibited excellent performance with an external electroluminescence quantum efficiency of 10.6% at a luminance of 100 cd m-2. These results present a strategy to improve the TADF properties and contribute to expanding the chemical space of the TADF materials.

    DOI： 10.1021/acsaom.4c00178

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  • Synthesis and Optical Properties of Tris(2,4,6-trichlorophenyl)methyl-Type Luminescent Radicals Bearing Multiple Carbazole Substituents Reviewed International journal

    Peiyuan Yang, Masakazu Nagata, Hiroki Fukumoto, Kouichi Nakashima, Takuma Yasuda, and Tomohiro Agou

    Bull. Chem. Soc. Jpn. 2024, 97, uoae045.   97 ( 5 )   2024.4   （ ISSN:0009-2673 eISSN:1348-0634 ）

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    Abstract

    Two tris(2,4,6-trichlorophenyl)methyl (TTM)-type luminescent radicals, TTM-(3PCz)2 and TTM-(3PCz)3, bearing 2 and 3 9-phenylcarbazol-3-yl (3PCz) substituents, respectively, were synthesized and characterized. The photobleaching of these radicals was suppressed compared with that of previously reported TTM-type luminescent radicals, suggesting a favorable effect of the multiple electron-donating 3PCz groups on the photostability of the TTM-type radicals.

    DOI： 10.1093/bulcsj/uoae045

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  • Thermally Activated Delayed Fluorescence Carbazole-Triazine Dendrimer with Bulky Substituents Reviewed International journal

    Hiroki Ikebe, Kohei Nakao, Eri Hisamura, Minori Furukori, Yasuo Nakayama, Takuya Hosokai, Minlang Yang, Guanting Liu, Takuma Yasuda, and Ken Albrecht

    Aggregate 2024, 5, e405.   5 ( 1 )   2024.2   （ ISSN:27668541 eISSN:2692-4560 ）

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    Abstract

    Carbazole‐triazine dendrimers with a bulky terminal substituent were synthesized, and the thermally activated delayed fluorescence (TADF) property was investigated. Compared to unsubstituted carbazole dendrimers, dendrimers with bulky terminal substituents showed comparable to better photoluminescence quantum yields (PLQY) in neat films. Phenylfluorene (PF)‐substituted dendrimers showed the highest PLQY of 81%, a small ΔE<sub>st</sub> of 0.06 eV, and the fastest reverse intersystem crossing (RISC) rate of ∼1 × 10<sup>5</sup> s<sup>−1</sup> compared to other dendrimers. Phosphorescence measurements of dendrimers and dendrons (fragments) indicate that the close proximity of the triplet energy of phenylfluorene‐substituted carbazole dendrons (<sup>3</sup>LE) to that of phenylfluorene‐substituted dendrimers (<sup>1</sup>CT, <sup>3</sup>CT) contributes to RISC promotion and improves TADF efficiency. Terminal modification fine‐tunes the energy level and suppresses intermolecular interactions, and this study provides a guideline for designing efficient solution‐processable and non‐doped TADF materials.

    DOI： 10.1002/agt2.405

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  • Pyromellitic-Diimide-Based Liquid Material Forming an Exciplex with Naphthalene Reviewed International journal

    Yuya Tanabe, Hirotaka Tsutsui, Shinya Matsuda, So Shikita, Takuma Yasuda, and Kyosuke Isoda

    ChemPhotoChem 2023, 7, e202200287.   2023.4

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    DOI： 10.1002/cptc.202200287

    Other Link： https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cptc.202200287

  • Special issue: π-conjugated polymers

    Takuma Yasuda, Itaru Osaka, Kazuo Tanaka, Keiji Tanaka

    Polymer Journal   55 ( 4 )   295 - 295   2023.4   （ ISSN:0032-3896 eISSN:1349-0540 ）

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    DOI： 10.1038/s41428-022-00750-9

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  • Room temperature phosphorescence in longer-wavelength red light region found in benzothiadiazole-based dyes

    Tsutomu Ishi-i, Rihoko Kichise, In Seob Park, Takuma Yasuda, Taisuke Matsumoto

    Journal of Materials Chemistry C   11 ( 8 )   3003 - 3009   2023.2   （ ISSN:2050-7526 eISSN:2050-7534 ）

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    Red phosphorescence emissions in the longer-wavelength region can be produced by introducing methoxy groups and bromine atoms into the electron-accepting benzothiadiazole dye.

    DOI： 10.1039/d3tc00162h

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  • Panchromatic Small-Molecule Organic Solar Cells Based on a Pyrrolopyrrole Aza-BODIPY with a Small Energy Loss Reviewed International journal

    Ru Feng, Tatsuya Mori, Takuma Yasuda, Hiroyuki Furuta, and Soji Shimizu

    Dyes Pigm. 2023, 210, 111020.   210   111020   2023.2   （ ISSN:0143-7208 eISSN:1873-3743 ）

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    A small photon energy loss (Eloss) is one of the requisites for achieving near-infrared (NIR) small-molecule organic solar cells (SM-OSCs). Herein, we present two novel pyrrolopyrrole aza-BODIPY (PPAB)-based panchromatic chromophores, TT-2PPAB and DFBT-2PPAB, with an acceptor-donor-acceptor configuration for photovoltaic studies. Among them, in combination with [6,6]-phenyl-C_<71> butyric acid methyl ester (PC_<71>BM) acceptor, TT-2PPAB exhibits a moderate power conversion efficiency (PCE) of 3.11% due to an Eloss of 0.48 eV, which is smaller than the empirical limit of 0.6 eV. Based on the electrochemistry and theoretical calculations, we revealed that the efficient photovoltaic performance of the TT-2PPAB-based device can be ascribed to the sufficiently deep LUMO level of TT-2PPAB for charge transfer to PC_<71>BM.

    DOI： 10.1016/j.dyepig.2022.111020

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  • Room Temperature Phosphorescence in Longer-Wavelength Red Light Region Found in Benzothiadiazole-Based Dyes Reviewed International journal

    Tsutomu Ishi-i, Rihoko Kichise, In Seob Park, Takuma Yasuda, and Taisuke Matsumoto

    J. Mater. Chem. C 2023, 11, 3003–3009.   2023.2

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    DOI： 10.1002/cptc.202200287

    Other Link： https://pubs.rsc.org/en/content/articlelanding/2023/tc/d3tc00162h

  • Regulation of Multicolor Fluorescence Changes Found in Donor–Acceptor-Type Mechanochromic Fluorescent Dyes Reviewed International journal

    Tsutomu Ishi-i, Honoka Tanaka, Rihoko Kichise, Christopher Davin, Takaaki Matsuda, Naoya Aizawa, In Seob Park, Takuma Yasuda, and Taisuke Matsumoto

    Chem. Asian J. 2021, 16, 2136-2145.   2021.6

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    DOI： 10.1002/asia.202100538

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  • Near Infrared Absorbing Pyrrolopyrrole Aza-BODIPY-Based Donor–Acceptor Polymers with Reasonable Photoresponse Reviewed International journal

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

    J. Mater. Chem. C 2020, 8, 8770-8776.   2020.6

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    DOI： 10.1039/D0TC01487G

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  • White-Light Emission from a Pyrimidine–Carbazole Conjugate with Tunable Phosphorescence–Fluorescence Dual Emission and Multicolor Emission Switching Reviewed International journal

    Tsutomu Ishi-i, Honoka Tanaka, In Seob Park, Takuma Yasuda, Shin-ichiro Kato, Mitsunori Ito, Hedetaka Hiyoshi, Taisuke Matsumoto

    Chem. Commun. 2020, 56, 4051-4054.   2020.3

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    DOI： 10.1039/D0CC00251H

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  • Rational Design of Pyrrolopyrrole-Aza-BODIPY-Based Acceptor-Donor-Acceptor Triads for Organic Photovoltaics Application Reviewed International journal

    Ru Feng, Narumi Sato, Takuma Yasuda, Hiroyuki Furuta, Soji Shimizu

    Chem. Commun. 2020, 56, 2975-2978.   2020.2

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

    DOI： 10.1039/D0CC00398K

    Other Link： https://pubs.rsc.org/en/content/articlelanding/2020/cc/d0cc00398k#!divAbstract

  • An Isonicotinonitrile-based Blue Thermally Activated Delayed Fluorescence Emitter Reviewed International journal

    In Seob Park, Takuma Yasuda

    Chem. Lett. 2020, 49, 210-213.   2020.2

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

    DOI： 10.1246/cl.190808

    Other Link： https://www.journal.csj.jp/doi/full/10.1246/cl.190808

  • Synthesis of Anthracene Derivatives with Azaacene‐Containing Iptycene Wings and the Utilization as a Dopant for Solution‐Processed Organic Light‐Emitting Diodes Reviewed International journal

    Hironobu Hayashi, Yuki Kato, Akinobu Matsumoto, So Shikita, Naoya Aizawa, Mitsuharu Suzuki, Naoki Aratani, Takuma Yasuda, Hiroko Yamada

    Chem. Eur. J. 2019, 25, 15565-15571.   2019.9

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

    DOI： 10.1002/chem.201903476

    Other Link： https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.201903476

  • Mechanochromic Fluorescence Based on a Combination of Acceptor and Bulky Donor Moieties: Tuning Emission Color and Regulating Emission Change Direction Reviewed International journal

    Tsutomu Ishi-i, Honoka Tanaka, Ryusuke Youfu, Naoya Aizawa, Takuma Yasuda, Shin-ichiro Kato, Taisuke Matsumoto

    New J. Chem. 2019, 43, 4998-5010.   2019.2

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

    DOI： 10.1039/C8NJ06050A

    Other Link： https://pubs.rsc.org/en/content/articlelanding/2019/nj/c8nj06050a#!divAbstract

  • π-Conjugated Naphthodithiophene Homopolymers Bearing Alkyl/Alkylthio-Thienyl Substituents: Facile Synthesis Using Hexamethylditin and Their Charge-Transport and Photovoltaic Properties Reviewed International journal

    Hideaki Komiyama, Tatsuya Oyama, Tatsuya Mori, Takuma Yasuda

    Polym. J. 2017, 49, 729-734.   2017.5

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

    DOI： 10.1038/pj.2017.45

  • Tetrathienoanthracene-Based π-Extended Narrow-Band-Gap Molecules: Synthesis, Physicochemical, and Photovoltaic Properties Reviewed International journal

    Hideaki Komiyama, Chihaya Adachi, Takuma Yasuda

    Chem. Lett. 2017, 46, 29-31.   2017.5

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    DOI： 10.1246/cl.160858

  • Star-Shaped and Linear π-Conjugated Oligomers Consisting of a Tetrathienoanthracene Core and Multiple Diketopyrrolopyrrole Arms for Organic Solar Cells Reviewed International journal

    Hideaki Komiyama, Chihaya Adachi, Takuma Yasuda

    Beilstein J. Org. Chem. 2016, 12, 1459-1466.   2016.5

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

    DOI： 10.3762/bjoc.12.142

  • Photon-Absorbing Charge-Bridging States in Organic Bulk Heterojunctions Consisting of Diketopyrrolopyrrole Derivatives and PCBM Reviewed International journal

    Mikiya Fujii, Woong Shin, Takuma Yasuda, Koichi Yamashita

    Phys. Chem. Chem. Phys. 2016, 18, 9514-9523.   2016.3

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    DOI： 10.1039/C5CP06183K

  • Organic Light-Emitting Diodes Based on Donor-Substituted Phthalimide and Maleimide Fluorophores Reviewed International journal

    Myung Eun Jang, Takuma Yasuda, Jiyoung Lee, Sae Youn Lee, Chihaya Adachi

    Chem. Lett. 2015, 44, 1248-1250.   2015.7

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    DOI： 10.1246/cl.150454

  • Highly Efficient Electroluminescence from Purely Organic Donor–Acceptor Systems Invited Reviewed International journal

    Katsuyuki Shizu, Jiyoung Lee, Hiroyuki Tanaka, Hiroko Nomura, Takuma Yasuda, Hironori Kaji, Chihaya Adachi

    Pure Appl. Chem. 2015, 87, 627-638.   2015.5

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  • Tetraphenyldibenzoperiflanthene as Sensitizer for Enhancing the Performance in Dinaphthothienothiophene-Based Photovoltaics with and without Fullerene Reviewed International journal

    Yan-qiong Zheng, William J. Potscavage Jr., Jing Zhang, Takuma Yasuda, Bin Wei, Chihaya Adachi

    Synth. Met. 2015, 205, 121–126.   2015.4

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  • 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 Trans. 2015, 44, 8356–8359.   2015.4

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  • Efficiency Enhancement of Organic Light-Emitting Diodes Incorporating a Highly Oriented Thermally Activated Delayed Fluorescence Emitter Reviewed International journal

    Christian Mayr, Sae Youn Lee, Tobias D. Schmidt, Takuma Yasuda, CHIHAYA ADACHI, Wolfgang Brutting

    Adv. Funct. Mater. 2014, 24, 5232–5239.   2014.4

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  • A Six-Carbazole-Decorated Cyclophosphazene as a Host with High Triplet Energy to Realize Efficient Delayed-Fluorescence OLEDs Reviewed International journal

    Takuro Nishimoto, Takuma Yasuda, Sae Youn Lee, Ryosuke Kondo, CHIHAYA ADACHI

    Mater. Horiz. 2014, 1, 264-269.   2014.4

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  • Polymorphism in 9,9-Diarylfluorene-Based Organic Semiconductors: Influence on Optoelectronic Functions Reviewed International journal

    Jun Yun Kim, Takuma Yasuda, Yu Seok Yang, Naoki Matsumoto, CHIHAYA ADACHI

    Chem. Commun. 2014, 50, 1523-1526.   2014.4

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  • Self-Assembly, Physicochemical, and Field-Effect Transistor Properties of Solution-Crystallized Organic Semiconductors Based on -Extended Dithieno[3,2-b:2',3'-d]thiophenes Reviewed International journal

    Hiroyuki Mieno, Takuma Yasuda, Yu Seok Yang, CHIHAYA ADACHI

    Chem. Lett. 2014, 43, 293-295.   2014.4

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  • Light-Emitting Organic Field-Effect Transistors Based on Highly Luminescent Single Crystals of Thiophene/Phenylene Co-Oligomers Reviewed International journal

    Takahiro Komori, Nakanotani Hajime, Takuma Yasuda, CHIHAYA ADACHI

    J. Mater. Chem. C 2014, 2, 4918–4921.   2014.4

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  • Donor–Acceptor Structured 1,4-Diazatriphenylene Derivatives Exhibiting Thermally Activated Delayed Fluorescence: Design and Synthesis, Photophysical Properties and OLED Characteristics Reviewed International journal

    Takehiro Takahashi, Katsuyuki Shizu, Takuma Yasuda, Kazunori Togashi, CHIHAYA ADACHI

    Sci. Technol. Adv. Mater. 2014, 15, 034202.   2014.4

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  • High Efficiency Light-Emitting Diodes with Fluorescent Emitters Reviewed International journal

    Hajime Nakanotani, Takahiro Higuchi, Taro Furukawa, Kensuke Masui, Kei Morimoto, Masaki Numata, Hiroyuki Tanaka, Yuta Sagara, Takuma Yasuda, CHIHAYA ADACHI

    Nature Commun. 2014, 5, 4016.   2014.4

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  • Thermally Activated Delayed Fluorescence from a Spiro-Diazafluorene Derivative Reviewed International journal

    Hiroshi Ohkuma, Tetsuya Nakagawa, Katsuyuki Shizu, Takuma Yasuda, CHIHAYA ADACHI

    Chem. Lett. 2014, 43, 1017–1019   2014.4

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  • A Highly Luminescent Spiro-Anthracenone-Based Organic Light-Emitting Diode through Thermally Activated Delayed Fluorescence Reviewed International journal

    Keiro Nasu, Tetsuya Nakagawa, Hiroko Nomura, Chi-Jen Lin, Chien-Hong Cheng, Mei-Rurng Tseng, Takuma Yasuda, CHIHAYA ADACHI

    Chem. Commun. 2013, 49, 10385–10387.   2013.9

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  • Oxadiazole- and Triazole-Based Highly-Efficient Thermally-Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodes Reviewed International journal

    Jiyoung Lee, Katsuyuki Shizu, Hiroyuki Tanaka, Hiroko Nomura, Takuma Yasuda, Takuma Yasuda

    J. Mater. Chem. C 2013, 1, 4599-4604.   2013.6

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  • 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, 651–653.   2013.5

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  • Triphenylene-Based Host Materials for Low-Voltage and Highly Efficient Red Phosphorescent Organic Light-Emitting Diodes Reviewed International journal

    Kazunori Togashi, Yasuda Takuma, ADACHI CHIHAYA

    Chem. Lett. 3013, 42, 383–385.   2013.4

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  • Effects of Intramolecular Donor-Acceptor Interactions on Bimolecular Recombination in Small-Molecule Organic Photovoltaic Cells Reviewed International journal

    Masaya Hirade, Yasuda Takuma, ADACHI CHIHAYA

    J. Phys. Chem. C 2013, 117, 4986-4991.   2013.3

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  • Triphenylene-Based Host Materials for Low-Voltage and Highly Efficient Red Phosphorescent Organic Light-Emitting Diodes Reviewed International journal

    Kazunori Togashi, Yasuda Takuma, ADACHI CHIHAYA

    Chem. Lett. 2013, 42, 383-385.   2013.3

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  • A Host Material Consisting of A Phosphinic Amide Directly Linked Donor-Acceptor Structure for Efficient Blue Phosphorescent Organic Light-Emitting Diodes Reviewed International journal

    Atsushi Wada, Yasuda Takuma, Qisheng Zhang, Yu Seok Yang, Isao Takasu, Shitaro Enomoto, ADACHI CHIHAYA

    J. Mater. Chem. C 2013, 1, 2404-2407.   2013.2

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  • Low Driving Voltage Characteristics of Triphenylene Derivatives as Electron Transport Materials in Organic Light-Emitting Diodes Reviewed International journal

    Kazunori Togashi, Shintaro Nomura, Norimasa Yokoyama, Takuma Yasuda, and Chihaya Adachi

    J. Mater. Chem. 2012, 22, 20689-20695.   22   2012.9

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    DOI： 10.1039/c2jm33669c

  • High-Performance Organic Light-Emitting Diodes Utilizing Efficient Thermally Activated Delayed Fluorescence from Triazine-Based Donor–Acceptor Hybrid Molecules Reviewed International journal

    Sae Youn Lee, Takuma Yasuda, Hiroko Nomura, and Chihaya Adachi,*

    Appl. Phys. Lett. 2012, 101, 093306.   101   2012.8

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  • 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, Isao Takasu, Naoya Enomoto, and Chihaya Adachi

    Chem. Commun. 2012, 48, 5340-5342.   2012.4

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

    DOI： 10.1039/c2cc31509b

  • 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

    Appl. Phys. Exp. 2011, 4, 071602.   4   2011.7

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  • Alignment of Photoconductive Self-Assembled Fibers Composed of π-Conjugated Molecules under Electric Fields Reviewed International journal

    Yoshiko Shoji, Masafumi Yoshio, Takuma Yasuda, Masahiro Funahashi, and Takashi Kato

    J. Mater. Chem. 2010, 20, 173–179.   20   2010.4

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  • Anisotropic Self-Assembly of Photoluminescent Oligo(p-phenylenevinylene) Derivatives in Liquid Crystals: An Effective Strategy for the Macroscopic Alignment of π-Gels Reviewed International journal

    Yuki Hirai, S. Santhosh Babu, Vakayil K. Praveen, Takuma Yasuda, Ayyappanpillai Ajayaghosh, and Takashi Kato

    Adv. Mater. 2009, 21, 4029–4033.   21   2009.10

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  • Macrocycle-Based Liquid Crystals: A Study of Topological Effects on Mesomorphism Reviewed International journal

    Etienne D. Baranoff, Julie Voignier, Takuma Yasuda, Valérie Heitz, Jean-Pierre Sauvage, and Takashi Kato

    Mol. Cryst. Liq. Cryst. 2009, 509, 165–172.   509   2009.9

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  • Photoluminescent Liquid Crystals Based on Trithienylphosphine Oxides Reviewed International journal

    Masaomi Kimura, Tsukasa Hatano, Takuma Yasuda, Jun Morita, Yusuke Akama, Kiyoshi Minoura, Takeshi Shimomura, and Takashi Kato

    Chem. Lett. 2009, 38, 800–801.   38   2009.7

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  • Supramolecular Structure of Columnar Liquid Crystalline π-Conjugated Oligothiophenes with Highly Polarized Photoluminescent Properties Reviewed International journal

    Kiyoshi Minoura, Yusuke Akama, Jun Morita, Takuma Yasuda, Takashi Kato, and Takeshi Shimomura

    J. Appl. Phys. 2009, 105, 113513-1-6.   105   2009.6

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  • A Layered Liquid Crystalline Droplet Reviewed International journal

    Yan-Li Zhao, Natalia Erina, Takuma Yasuda, Takashi Kato, and J. Fraser Stoddart

    J. Mater. Chem. 2009, 19, 3469–3474.   19   2009.4

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  • Luminescent Ionic Liquid Crystals Based on Tripodal Pyridinium Salts Reviewed International journal

    Kana Tanabe, Takuma Yasuda, and Takashi Kato

    Chem. Lett. 2008, 37, 1208–1209.   37   2008.11

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  • Dipole-Driven Self-Assembly of Redox-Active Mesogenic Tetracyanoanthraquinodimethanes Reviewed International journal

    Kyosuke Isoda, Takuma Yasuda, and Takashi Kato

    J. Mater. Chem. 2008, 18, 4522–4528.   18   2008.8

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  • Luminescent π-Conjugated Poly(aryleneethynylene)s Consisting of Plural Aromatic Units: Preparation and Systematic Studies on Their Optical Properties Reviewed International journal

    Takashi Morikita, Takuma Yasuda, and Takakazu Yamamoto

    React. Funct. Polym. 2008, 68, 1483–1491.   68   2008.8

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  • Viologen-Based Redox-Active Ionic Liquid Crystals Forming Columnar Phases Reviewed International journal

    Kana Tanabe, Takuma Yasuda, Masafumi Yoshio, and Takashi Kato

    Org. Lett. 2007, 9, 4271–4274.   9   2007.9

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  • A Liquid-Crystalline [2]Catenane and Its Copper(I) Complex Reviewed International journal

    Etienne D. Baranoff, Julie Voignier, Takuma Yasuda, Valérie Heitz, Jean-Pierre Sauvage, and Takashi Kato

    Angew. Chem. Int. Ed. 2007, 46, 4680–4683.   46   2007.5

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  • Oligothiophene-Based Liquid Crystals Exhibiting Smectic A Phases in Wider Temperature Ranges Reviewed International journal

    Masaomi Kimura, Takuma Yasuda, Kenji Kishimoto, Gunther Gotz, Peter Bauerle, and Takashi Kato

    Chem. Lett. 2006, 35, 1150–1151.   35   2006.7

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  • Utilization of Industrially Available 2,3-Dichloro-1,3-butadiene for Direct Synthesis of 2,3-Diaryl-1,3-butadienes Reviewed International journal

    Takakazu Yamamoto, Takuma Yasuda, Kazuaki Kobayashi, Isao Yamaguchi, Take-aki Koizumi, Daisuke Ishii, Masaru Nakagawa, Yoshihiro Mashiko, and Norihiro Shimizu

    Bull. Chem. Soc. Jpn. 2006, 79, 498–500.   79   2006.3

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  • Transfer of Photoenergy in π-Conjugated Polymers. Two Types of Photoluminescence that Involve Energy Transfer along a Polymer Chain Reviewed International journal

    Takakazu Yamamoto, Bang-Lin Lee, Ismayil Nurulla, Takuma Yasuda, Isao Yamaguchi, Akihide Wada, Chiaki Hirose, Mitsuo Tasumi, Akira Sakamoto, and Eiji Kobayashi

    J. Phys. Chem. B 2005, 109, 10605–10610.   109   2005.5

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Books

  • World Scientific Handbook of Organic Optoelectronic Devices, Volume 3: OLEDs (Ed. Dongge Ma) “Boron-Containing Thermally Activated Delayed Fluorescence Materials for High-Efficiency OLEDs”, Chapter 2, pp. 61–78.

    In Seob Park and Takuma Yasuda（Role：Joint author）

    World Scientific  2022.3 

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    Language：English   Book type：Scholarly book

  • Light-Active Functional Organic Materials (Ed: H. Yamada and S. Yagai) “Thermally Activated Delayed Fluorescence (TADF) Materials for Organic Light-Emitting Devices”, Chapter 8, pp. 151–171.

    Kyohei Matsuo, Naoya Aizawa, Takuma Yasuda（Role：Joint author）

    Pan Stanford Publishing  2019.4 

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  • Organic Electronics Materials and Devices, (Ed: S. Ogawa) “Organic Light-Emitting Diodes (OLEDs): Materials, Photophysics, and Device Physics”, Chapter 2, pp. 43–73.

    Chihaya Adachi, Sae Youn Lee, Tetsuya Nakagawa, Katsuyuki Shizu, Kenichi Goushi, Takuma Yasuda, William J. Potscavage Jr.（Role：Joint author）

    Springer  2015.10 

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  • Supramolecular Soft Matter: Applications in Materials and Organic Electronics (Ed: T. Nakanishi) “Advanced Systems of Supramolecular Liquid Crystals”, Chapter 14, pp. 283–299.

    Takuma Yasuda and Takashi Kato（Role：Joint author）

    Wiley  2011.10 

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    Language：English   Book type：Scholarly book

  • 「機能性ナノ構造液晶の新展開」　ファインケミカル, Vol. 40, No. 3, pp. 36–41

    安田琢麿・加藤隆史（Role：Joint author）

    2011.2 

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    Language：Japanese   Book type：Scholarly book

  • 液晶―構造制御と機能化の最前線―（加藤隆史 監修、分担執筆） 「液晶性有機半導体のナノ構造化」

    舟橋正浩・安田琢麿・加藤隆史（Role：Joint author）

    シーエムシー出版  2010.6 

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    Language：Japanese   Book type：Scholarly book

  • 電子共役系有機材料の創製・機能開発・応用 （檜山爲次郎 監修、分担執筆） 「電子共役系の自己組織化と機能」

    安田琢麿・加藤隆史（Role：Joint author）

    シーエムシー出版  2008.1 

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    Language：Japanese   Book type：Scholarly book

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MISC

  • Indoor Photovoltaic Energy Harvesting Based on Semiconducting π-Conjugated Polymers and Oligomeric Materials toward Future IoT Applications Reviewed

    Sunbin Hwang, Takuma Yasuda

    Polym. J. 2023, 55, 297–316.   2023.4

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    Language：English   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

    DOI： 10.1038/s41428-022-00727-8

    Other Link： https://www.nature.com/articles/s41428-022-00727-8

  • Narrowband Emissive Thermally Activated Delayed Fluorescence Materials Reviewed

    Hyung Jong Kim, Takuma Yasuda

    Adv. Optical Mater. 2022, 10, 2201714.   2022.9

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    DOI： 10.1002/adom.202201714

    Other Link： https://onlinelibrary.wiley.com/doi/10.1002/adom.202201714

  • 凝集誘起遅延蛍光 Reviewed

    安田 琢麿

    高分子   2022.9

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  • Design of Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes Reviewed

    Naoya Aizawa, In Seob Park, Takuma Yasuda

    AAPPS Bull. 2016, 26, 9-19.   2016.2

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  • Self-Assembly of Functional Columnar Liquid Crystals Reviewed

    Takashi Kato, Takuma Yasuda, Yuko Kamikawa, and Masafumi Yoshio

    Chem. Commun. 2009, 729–739.   2009.1

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  • 高効率熱活性化遅延蛍光材料の開発と有機ELへの展開

    安田 琢麿, 李 世淵, 安達 千波矢

    科学と工業   2014.10

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  • Liquid-Crystalline Catenanes and Rotaxanes Reviewed

    Junji Sakuda, Yasuda Takuma, Takashi Kato

    Isr. J. Chem. 2012, 52, 854-862.   2012.12

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  • Functional soft Materials: Nanostructured Liquid Crystals and Self-Assembled Fibrous Aggregates Reviewed

    Takashi Kato, Yoshiko Shoji, Masafumi Yoshio, Shogo Yamane, and Takuma Yasuda

    J. Synth. Org. Jpn. 2010, 68, 1169-1174.   2011.10

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  • 電子活性π共役液晶の新材料設計と機能化

    安田琢麿・加藤隆史

    液晶   2011.4

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  • Clicked Interlocked Molecules Reviewed International coauthorship

    Ivan Aprahamian, Ognjen S. Miljanic, William R. Dichtel, Kyosuke Isoda, Takuma Yasuda, Takashi Kato, and J. Fraser Stoddart

    Bull. Chem. Soc. Jpn. 2007, 80, 1856–1869.   2007.10

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  • PAEs with Heteroaromatic Rings Reviewed

    Takakazu Yamamoto, Isao Yamaguchi, and Takuma Yasuda

    Adv. Polym. Sci. 2005, 177, 181–208.   2005.5

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Professional Memberships

  • The Chemical Society of Japan

  • The Society of Polymer Science, Japan

  • The Japan Society of Applied Physics

  • The Society of Physical Organic Chemistry, Japan

  • The Japanese Photochemistry Association

  • The Society of Synthetic Organic Chemistry, Japan

  • Materials Research Society

  • American Chemical Society

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Committee Memberships

  • 有機合成化学協会 九州山口支部 副支部長   Domestic

    2024.1 - 2025.12   

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    Committee type：Academic society

  • 日本学術振興会 特別研究員等審査会専門委員及び国際事業委員会審査員   Domestic

    2019.7 - 2021.6   

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    Committee type：Other

  • 日本学術振興会 創造機能化学第116委員会委員   Domestic

    2018.1 - 2021.3   

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    Committee type：Other

  • 高分子学会Polymer Journal論文賞－日本ゼオン賞選考委員   Domestic

    2016.1 - Present   

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    Committee type：Academic society

  • 日本学術振興会 科学研究費委員会専門委員   Domestic

    2015.12 - 2017.11   

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    Committee type：Other

  • 文部科学省 科学技術・学術政策研究所（NISTEP） 科学技術予測センター 専門調査員   Domestic

    2015.4 - 2020.3   

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    Committee type：Government

  • 日本学術振興会 特別研究員等審査会専門委員及び国際事業委員会審査員   Domestic

    2014.8 - 2015.7   

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    Committee type：Other

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Academic Activities

  • Bulletin of the Chemicl Society of Japan, Accociate Editor International contribution

    Role(s)： Review, evaluation,　Peer review

    2024.1 - Present

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    Type：Scientific advice/Review 

  • Advanced Optical Materials, Editorial Advisory Board International contribution

    Role(s)： Review, evaluation,　Planning/Implementing academic research,　Peer review

    2020.3 - Present

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    Type：Academic society, research group, etc. 

  • Aggregate, Editorial Board International contribution

    Role(s)： Review, evaluation,　Peer review

    2020.3 - Present

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    Type：Scientific advice/Review 

  • Polymer Journal, Associate Editor International contribution

    Role(s)： Review, evaluation,　Peer review

    2015.9 - Present

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    Type：Scientific advice/Review 

  • 日本液晶学会誌　液晶 International contribution

    日本液晶学会  2011.10 - 2014.3

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    Type：Academic society, research group, etc. 

Educational Activities

  • 工学府応用化学専攻において、協力講座として大学院教育を担当している。また、工学部応用化学科・機能コースの学部教育も担当している。大学院博士課程・修士課程の大学院生、および学部の卒業研究生に対する研究指導を行っている。研究室においては、大学院生および卒業研究生に対して個別の研究打合せ、実験および論文の指導、研究討論を実施している。

Outline of Social Contribution and International Cooperation activities

  • オープンキャンパス、出前講義、実験教室などの活動を行っている。スーパーサイエンスハイスクール（SSH）の活動にも携わっている。

Social Activities

  • 文部科学省スーパーサイエンスハイスクール（SSH）運営指導委員会委員

    Role(s)：Advisor

    2024.4 - Present