Development of photo-functional molecular systems based on three-dimensional meso-structure control

• Project/Area Number: 18H02048
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Kyushu University
• Principal Investigator: Yasuda Takuma 九州大学, 稲盛フロンティア研究センター, 教授 (00401175)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000); Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2018: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
• Keywords: 発光 / 有機エレクトロニクス / 有機半導体 / デバイス / メゾ空間 / 光機能

Outline of Final Research Achievements

The goal of this research project is to develop innovative photo-functional molecular systems by controlling the meso-structures and electronic states. We systematically investigated the fundamental photophysical processes including reverse intersystem crossing and excited energy transfer using the concentration-quenching-free TADF technology, and demonstrated new photo-functions such as stimuli-responsive TADF. These achievements will contribute to the further developments of high-efficiency organic light-emitting diodes based on TADF.

Academic Significance and Societal Importance of the Research Achievements

発光分子の凝集系におけるメゾ空間組織制御や電子状態制御により、分子が本来有する特性を最大限発揮させ発光機能の飛躍的な高効率化や新機能の発現に繋がった。有機発光分子に関する基礎科学の学術的な進展に寄与するとともに、有機ELをはじめとする種々の有機エレクトロニクスデバイスの高性能化・高機能化などの応用展開にも資すると期待される。

Research Products

• [Journal Article] Regiocontrolled Synthesis of Ester-Functionalized Polythiophenes via Direct Arylation Polycondensation (2021)
  • Author(s): Taiki Menda, Tatsuya Mori, and Takuma Yasuda
  • Journal Title: Polymer Journal Volume: 53 Issue: 2 Pages: 403-408
  • DOI: 10.1038/s41428-020-00421-7
  • Peer Reviewed
• [Journal Article] Phenyl-Triggered Photophysical Switching between Normal Fluorescence and Delayed Fluorescence in Phthalonitrile-Based Luminophores (2021)
  • Author(s): In seob Park, Hyukgi Min, and Takuma Yasuda
  • Journal Title: Aggregate Volume: 2 Issue: 1 Pages: 145-150
  • DOI: 10.1002/agt2.14
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] U-Shaped Heteroacenes Embedded with Heavy Chalcogen Atoms: Unique Bilayer Self-Organization of Crooked π-Cores Enabling Efficient Charge Transport (2021)
  • Author(s): Tatsuya Mori and Takuma Yasuda
  • Journal Title: Advanced Electronic Materials Volume: 7 Issue: 3 Pages: 2001052-2001052
  • DOI: 10.1002/aelm.202001052
  • Peer Reviewed
• [Journal Article] cis-Quinacridone-Based Delayed Fluorescence Emitters: Seemingly Old but Renewed Functional Luminogens (2021)
  • Author(s): Hyukgi Min, In Seob Park, and Takuma Yasuda
  • Journal Title: Angewandte Chemie International Edition Volume: 60 Issue: 14 Pages: 7643-7648
  • DOI: 10.1002/anie.202016914
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermal Equilibration between Singlet and Triplet Excited States in Organic Fluorophore for Submicrosecond Delayed Fluorescence (2021)
  • Author(s): Naoya Aizawa, Akinobu Matsumoto, and Takuma Yasuda
  • Journal Title: Science Advances Volume: 7 Issue: 7 Pages: 5769-5769
  • DOI: 10.1126/sciadv.abe5769
  • Peer Reviewed / Open Access
• [Journal Article] Mechanochromic Delayed Fluorescence Switching in Propeller‐Shaped Carbazole?Isophthalonitrile Luminogens with Stimuli‐Responsive Intramolecular Charge‐Transfer Excited States (2020)
  • Author(s): Yang Minlang、Park In Seob、Miyashita Yasuhiro、Tanaka Katsunori、Yasuda Takuma
  • Journal Title: Angewandte Chemie International Edition Volume: 59 Issue: 33 Pages: 13955-13961
  • DOI: 10.1002/anie.202005584
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Solution-Processable Organic Semiconductors Featuring S-Shaped Dinaphthothienothiophene (S-DNTT): Effects of Alkyl Chain Length on Self-Organization and Carrier Transport Properties (2020)
  • Author(s): Yuji Yamaguchi, Yuka Kojiguchi, So Kawata, Tatsuya Mori, Kazuo Okamoto, Masanori Tsutsui, Tomoyuki Koganezawa, Hiroshi Katagiri, and Takuma Yasuda
  • Journal Title: Chemistry of Materials Volume: 32 Issue: 12 Pages: 5350-5360
  • DOI: 10.1021/acs.chemmater.0c01740
  • Peer Reviewed
• [Journal Article] Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics (2020)
  • Author(s): Minlang Yang, In Seob Park, and Takuma Yasuda
  • Journal Title: Journal of the American Chemical Society Volume: 142 Issue: 46 Pages: 19468-19472
  • DOI: 10.1021/jacs.0c10081
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dipolar and Quadrupolar Luminophores Based on 1,8-Dimethylcarbazole-Triazine Conjugates for High-Efficiency Blue Thermally Activated Delayed Fluorescence OLEDs (2020)
  • Author(s): Hyukgi Min, In Seob Park, Takuma Yasuda
  • Journal Title: ChemPhotoChem Volume: 4 Issue: 1 Pages: 82-88
  • DOI: 10.1002/cptc.201900186
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A Liquid-Crystalline Semiconducting Polymer Based on Thienylene-Vinylene-Thienylene: Enhanced Hole Mobilities by Mesomorphic Molecular Ordering and Thermoplastic Shape-Deformable Characteristics (2020)
  • Author(s): Tatsuya Mori, Hideaki Komiyama, Takahiro Ichikawa, and Takuma Yasuda
  • Journal Title: Polymer Journal Volume: 52 Issue: 3 Pages: 313-321
  • DOI: 10.1038/s41428-019-0282-4
  • NAID: 40022176436
  • Peer Reviewed
• [Journal Article] An Isonicotinonitrile-Based Blue Thermally Activated Delayed Fluorescence Emitter (2020)
  • Author(s): In Seob Park, Takuma Yasuda
  • Journal Title: Chemistry Letters Volume: 49 Issue: 2 Pages: 210-213
  • DOI: 10.1246/cl.190808
  • NAID: 130007795178
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Strategic End-Halogenation of π-Conjugated Small Molecules Enabling Fine Morphological Control and Enhanced Performance of Organic Solar Cells (2019)
  • Author(s): Seiichi Furukawa and Takuma Yasuda
  • Journal Title: Journal of Materials Chemistry A Volume: 7 Issue: 24 Pages: 14806-14815
  • DOI: 10.1039/c9ta03869h
  • Peer Reviewed
• [Journal Article] Organic Energy-Harvesting Devices Achieving Power Conversion Efficiencies over 20% under Ambient Indoor Lighting (2019)
  • Author(s): Ryota Arai, Seiichi Furukawa, Narumi Sato, and Takuma Yasuda
  • Journal Title: Journal of Materials Chemistry A Volume: 7 Issue: 35 Pages: 20187-20192
  • DOI: 10.1039/c9ta06694b
  • Peer Reviewed
• [Journal Article] Blue Thermally Activated Delayed Fluorescence Emitters Incorporating Acridan Analogues with Heavy Group 14 Elements for High-Efficiency Doped and Non-Doped OLEDs (2019)
  • Author(s): vKyohei Matsuo and Takuma Yasuda
  • Journal Title: Chemical Science Volume: 10 Issue: 46 Pages: 10687-10697
  • DOI: 10.1039/c9sc04492b
  • Peer Reviewed
• [Journal Article] Pentacyclic Ladder-Heteraborin Emitters Exhibiting High-Efficiency Blue Thermally Activated Delayed Fluorescence with an Ultrashort Emission Lifetime (2019)
  • Author(s): Agou Tomohiro, Matsuo Kyohei, Kawano Rei, Park In Seob, Hosoya Takaaki, Fukumoto Hiroki, Kubota Toshio, Mizuhata Yoshiyuki, Tokitoh Norihiro, Yasuda Takuma
  • Journal Title: ACS Materials Letters Volume: 2 Issue: 1 Pages: 28-34
  • DOI: 10.1021/acsmaterialslett.9b00433
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Boronate- and Borinate-Based π-Systems for Blue Thermally Activated Delayed Fluorescence Materials (2019)
  • Author(s): Kyohei Matsuo and Takuma Yasuda
  • Journal Title: Chemical Communications Volume: 55 Issue: 17 Pages: 2501-2504
  • DOI: 10.1039/c8cc10282a
  • Peer Reviewed
• [Journal Article] High-Performance Organic Energy-Harvesting Devices and Modules for Self-Sustainable Power Generation under Ambient Indoor Lighting Environments (2019)
  • Author(s): Ryota Arai, Seiichi Furukawa, Yu Hidaka, Hideaki Komiyama, and Takuma Yasuda
  • Journal Title: ACS Applied Materials & Interfaces Volume: 11 Issue: 9 Pages: 9259-9264
  • DOI: 10.1021/acsami.9b00018
  • Peer Reviewed
• [Journal Article] High-Performance Dibenzoheteraborin-Based Thermally Activated Delayed Fluorescence Emitters: Molecular Architectonics for Concurrently Achieving Narrowband Emission and Efficient Triplet-Singlet Spin Conversion (2018)
  • Author(s): In Seob Park, Kyohei Matsuo, Naoya Aizawa, and Takuma Yasuda
  • Journal Title: Advanced Functional Materials Volume: 28 Issue: 34 Pages: 1802031-1802031
  • DOI: 10.1002/adfm.201802031
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Modulating Photo- and Electroluminescence in a Stimuli-Responsive π-Conjugated Donor-Acceptor Molecular System (2018)
  • Author(s): Kohei Isayama, Naoya Aizawa, Jun Yun Kim, and Takuma Yasuda
  • Journal Title: Angewandte Chemie International Edition Volume: 57 Issue: 37 Pages: 11982-11986
  • DOI: 10.1002/anie.201806863
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] High-Crystallinity π-Conjugated Small Molecules Based on Thienylene-Vinylene-Thienylene: Critical Role of Self-Organization in Photovoltaic, Charge-Transport, and Morphological Properties (2018)
  • Author(s): Seiichi Furukawa, Hideaki Komiyama, Naoya Aizawa, and Takuma Yasuda
  • Journal Title: ACS Applied Materials & Interfaces Volume: 10 Issue: 49 Pages: 42756-42765
  • DOI: 10.1021/acsami.8b17056
  • Peer Reviewed
• [Presentation] 高速スピン変換可能な次世代有機発光材料 (2020)
  • Author(s): 安田琢麿
  • Organizer: 第10回CSJ化学フェスタ2020
  • Invited
• [Presentation] A New Paradigm in Design of Organic Light-Emitting Materials and Devices (2019)
  • Author(s): Takuma Yasuda
  • Organizer: 10th International Conference on Materials for Advanced Technologies (ICMAT 2019)
  • Int'l Joint Research / Invited
• [Presentation] Design of Efficient TADF Materials for OLEDs (2018)
  • Author(s): Takuma Yasuda
  • Organizer: 14th International Conferences on Modern Materials & Technologies 2018 (CIMTEC 2018): 8th Forum on New Materials
  • Int'l Joint Research / Invited
• [Presentation] Thermally Activated Delayed Fluorescence Materials with AIE Properties for OLEDs (2018)
  • Author(s): Takuma Yasuda
  • Organizer: European Materials Research Society (E-MRS) 2018 Spring Meeting
  • Int'l Joint Research / Invited
• [Presentation] 光電子機能性分子が拓く革新的有機光エレクトロニクス (2018)
  • Author(s): 安田琢麿
  • Organizer: π造形若手会
  • Invited
• [Presentation] デザインドπマテリアルが拓く革新的有機光エレクトロニクス (2018)
  • Author(s): 安田琢麿
  • Organizer: 近畿化学協会有機金属化学部会第3回例会
  • Invited
• [Presentation] A New Paradigm in Design of Organic Light-Emitting Materials and Devices (2018)
  • Author(s): Takuma Yasuda
  • Organizer: 第28回日本MRS年次大会
  • Invited