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Highly Efficient Organic Long-persistent Luminescent System by Improving Photo-Induced Charge Separation process

Research Project

Project/Area Number 21H02020
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 35030:Organic functional materials-related
Research InstitutionOkinawa Institute of Science and Technology Graduate University

Principal Investigator

Kabe Ryota  沖縄科学技術大学院大学, 有機光エレクトロニクスユニット, 准教授 (00726490)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords蓄光 / 電荷分離 / 有機半導体 / 電荷蓄積 / 電荷再結合 / 蛍光 / 電荷移動 / フォトルミネッセンス / 有機蓄光 / 有機エレクトロニクス
Outline of Research at the Start

有機蓄光材料は、既存の無機蓄光材料に比べて、持続可能性、励起波長、柔軟性や可溶性といった面で利点があるが、その効率は無機蓄光材料の1/100程度に留まっている。
本研究では有機電子ドナー・アクセプター界面における電荷分離の効率を向上させ、安定な電荷分離状態を形成することで、実用レベルの有機蓄光材料を実現する。

Outline of Final Research Achievements

Organic long-persistent luminescence (LPL) materials are capable of storing light energy as charges, which then recombine to emit light over an extended period. However, the amount of charge that can be stored in organic materials is lower compared to inorganic materials, necessitating improvements. In this study, we introduced a charge trapping mechanism to stabilize the charge-separated state in organic materials, resulting in a significant enhancement of LPL efficiency. Additionally, by suppressing electron transfer to oxygen, we successfully developed an organic LPL system that works under air. Through polymerization, we achieved stable LPL without the need to mix different materials.

Academic Significance and Societal Importance of the Research Achievements

蓄光材料は非常誘導灯などに実用化されている材料であるが、高性能な材料はレアメタルを必要とする。本研究の有機蓄光システムはレアメタルなどを一切必要とせず、高分子材料を塗布するだけで蓄光発光を得ることが可能となる。本研究の成果により有機蓄光を大気下でも取り出すことが可能となり、また近赤外発光も実現した。この成果は将来的な有機蓄光の実用化やバイオイメージング用途への応用につながる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (32 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (30 results) (of which Int'l Joint Research: 9 results,  Invited: 21 results)

  • [Journal Article] Oxygen‐Tolerant Near‐Infrared Organic Long‐Persistent Luminescent Copolymers**2024

    • Author(s)
      Lin Zesen、Li Maosheng、Yoshioka Rengo、Oyama Ryoko、Kabe Ryota
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 63 Issue: 7 Pages: 1-9

    • DOI

      10.1002/anie.202314500

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Organic long-persistent luminescence stimulated by visible light in p-type systems based on organic photoredox catalyst dopants2021

    • Author(s)
      Jinnai Kazuya、Kabe Ryota、Lin Zesen、Adachi Chihaya
    • Journal Title

      Nature Materials

      Volume: 21 Issue: 3 Pages: 338-344

    • DOI

      10.1038/s41563-021-01150-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Organic semiconductors showing photoinduced carrier accumulation2024

    • Author(s)
      Ryota Kabe
    • Organizer
      OIST x UCSB mini symposium-"Materials of Tomorrow: Harnessing Responsiveness, Intelligence, and Sustainability"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Persistent and stimulated luminescence based on charge transfer of organic molecules2024

    • Author(s)
      Ryota Kabe
    • Organizer
      The 104th CSJ Annual Meeting 2024
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Optoelectronic properties of stable organic charge carriers2024

    • Author(s)
      Ryota Kabe
    • Organizer
      OIST-Kyudai Joint Symposium series 1 : Bio-Inspired Wonders and Energy Innovations
    • Related Report
      2023 Annual Research Report
  • [Presentation] Stable organic charge carriers accumulated by photoexcitation2024

    • Author(s)
      Ryota Kabe
    • Organizer
      I2CNER Thrust Workshop: TOWARD CARBON NEUTRALITY ADVANCED ENERGY CONVERSION SYSTEMS THRUST (AECS)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Stable charge carriers of organic semiconducting materials2023

    • Author(s)
      Ryota Kabe
    • Organizer
      Shanghai University Seminar
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] アモルファス有機半導体中の安定な電荷と光機能2023

    • Author(s)
      嘉部量太
    • Organizer
      第一回ナノエラストロニクスワークショップ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Stable charge carriers of organic semiconducting materials2023

    • Author(s)
      Ryota Kabe
    • Organizer
      OIST Seminars on organic and perovskite optoelectronics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 有機光エレクトロニクスユニット2023

    • Author(s)
      嘉部量太
    • Organizer
      esse-sense FORUM2023 OISTセッション/沖縄に集う先端研究のインパクトに出会う
    • Related Report
      2023 Annual Research Report
  • [Presentation] Optical property of stable charge-separated states2023

    • Author(s)
      Ryota Kabe
    • Organizer
      RIKEN CEMS Topical Meeting
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 光誘起電荷分離を利用した有機蓄光システム2023

    • Author(s)
      嘉部量太
    • Organizer
      第 131 回本画像学会年次会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Stimulated luminescence from charge-separated states of organic materials2023

    • Author(s)
      Ryota Kabe
    • Organizer
      Q-PIT Symposium: Advanced Photochemistry and Molecular Spectroscopy
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Persistent luminescence from stable charge-separated states2023

    • Author(s)
      Ryota Kabe
    • Organizer
      JST-OIST Joint Symposium on Circularly Polarized Luminescence and the Related Phenomena
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Organic afterglow caused by stable charge carriers2023

    • Author(s)
      Ryota Kabe
    • Organizer
      OIST-KEIO SHOWCASE TALK Series 4
    • Related Report
      2022 Annual Research Report
  • [Presentation] 固体有機材料における電荷蓄積とその光機能2023

    • Author(s)
      嘉部量太
    • Organizer
      第70回 応用物理学会 春季学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Persistent luminescence from stable photoinduced charge-separated state2022

    • Author(s)
      Ryota Kabe
    • Organizer
      SPIE Photonics Europe
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電荷分離を利用した機能性発光材料2022

    • Author(s)
      嘉部量太
    • Organizer
      高分子学会 22-1有機エレクトロニクス研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 電荷分離を利用した有機光機能材料2022

    • Author(s)
      嘉部量太
    • Organizer
      錯体化学若手の会夏の学校2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Unique optoelectronic properties of stable organic radical ion pairs2022

    • Author(s)
      Ryota Kabe
    • Organizer
      The 5th International Union of Materials Research Societies International Conference of Young Researchers on Advanced Materials (IUMRS-ICYRAM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Near-infrared p-type organic long-persistent luminescence copolymer2022

    • Author(s)
      Z. Lin, M. Li, R. Kabe
    • Organizer
      The 5 th International Symposium on Aggregation- Induced Emission
    • Related Report
      2022 Annual Research Report
  • [Presentation] Long-persistent luminescence from an exciplex-based organic light-emitting diode2022

    • Author(s)
      Ryota Kabe
    • Organizer
      SPIE Optics + Photonics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 有機材料における電荷蓄積とその光機能2022

    • Author(s)
      嘉部量太
    • Organizer
      分子研物質分子科学研究領域研究会「物質分子科学の研究展望」
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 安定電荷分離状態からの刺激応答発光2022

    • Author(s)
      嘉部量太
    • Organizer
      第71回高分子討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 有機材料中の電荷蓄積とその光機能2022

    • Author(s)
      嘉部量太
    • Organizer
      第13回動的エキシトン若手セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 有機材料の安定電荷分離状態とその光機能2022

    • Author(s)
      嘉部量太
    • Organizer
      応用物理学会フォトニクス分科会・フォトニクスワークショップ
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Near-infrared organic long-persistent luminescence from p-type co-polymer,2022

    • Author(s)
      Z. Lin, M. Li, R. Kabe
    • Organizer
      7th TADF workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電荷分離状態を利用した光機能材料2021

    • Author(s)
      嘉部量太
    • Organizer
      第23回“光”機到来!Qコロキウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Persistent luminescence from stable charge-separated states2021

    • Author(s)
      Ryota Kabe
    • Organizer
      The 6th International TADF Workshop
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 安定電荷分離状態を利用した光機能材料2021

    • Author(s)
      嘉部量太
    • Organizer
      第97回高分子若手研究会(関西)
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 有機材料を用いた輝尽発光システムの開発2021

    • Author(s)
      櫻井 学, 嘉部 量太, 婦木 正明, LIN Zesen, 陣内 和哉, 小堀 康博, 安達 千波矢, 立川 貴士
    • Organizer
      2021年光化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電荷分離を利用した有機蓄光材料2021

    • Author(s)
      嘉部量太
    • Organizer
      強光子場科学研究懇談会 2020年度 第2回懇談会
    • Related Report
      2021 Annual Research Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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