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Development of high-performance organic light-emitting transistors by harvesting triplet excited states

Research Project

Project/Area Number 17K14531
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Organic and hybrid materials
Research InstitutionKyushu University

Principal Investigator

MAMADA MASASHI  九州大学, 分子システムデバイス国際リーダー教育センター, 助教 (60625854)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords熱活性化遅延蛍光 / 有機発光トランジスタ / 有機半導体 / 有機EL / 三重項励起子 / 有機トランジスタ / 有機エレクトロニクス
Outline of Final Research Achievements

Organic light-emitting transistors (OLET) are organic optoelectronic devices with potential applications as pixels for displays and future organic semiconductor laser devices. However, their performance remains at a low level because only 25% of excitons can be utilized in standard OLETs using fluorescent materials. Therefore, we focused on using thermally activated delayed fluorescence (TADF) materials, which can also emit light from the remaining 75% of excitons through efficient triplet harvesting. We demonstrated the first TADF-based OLET by fabricating organic transistor devices employing a TADF material. These results prove that triplet harvesting is possible in OLET devices, suggesting the great potential to achieve external quantum efficiencies of up to 20%.

Academic Significance and Societal Importance of the Research Achievements

本研究は、有機発光トランジスタの高効率化への道筋を明確に示した。蛍光材料を用いたこれまでのデバイスでは理論効率が最大5%であるのに対し、20%まで向上可能である。有機トランジスタは、有機ELと組み合わせたフレキシブルディスプレイなどへの応用が期待されるが、煩雑なプロセスにおける様々な技術的課題から実用化は遠い。一方、有機発光トランジスタでは素子を簡略化できるなどの利点がある。また、有機半導体レーザーデバイスへの展開なども期待されており、本研究の成果は次世代エレクトロニクスデバイスの発展に寄与する。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results) Presentation (2 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] The University of Queensland(Australia)

    • Related Report
      2017 Research-status Report
  • [Journal Article] The Importance of Excited‐State Energy Alignment for Efficient Exciplex Systems Based on a Study of Phenylpyridinato Boron Derivatives2018

    • Author(s)
      Masashi Mamada, Guojian Tian, Hajime Nakanotani, Jianhua Su, and Chihaya Adachi
    • Journal Title

      Angew. Chem. Int. Ed.

      Volume: 57 Issue: 38 Pages: 12380-12384

    • DOI

      10.1002/anie.201804218

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Low ASE Threshold and Efficient Electroluminescence from a Carbazole Derivatized Excited State Intramolecular Proton Transfer (ESIPT) Dye2018

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

      ACS Photonics

      Volume: 5 Issue: 11 Pages: 4447-4455

    • DOI

      10.1021/acsphotonics.8b00907

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Low Amplified Spontaneous Emission Threshold from Organic Dyes Based on Bis-stilbene2018

    • Author(s)
      Masashi Mamada, Toshiya Fukunaga, Fatima Bencheikh, Atula S. D. Sandanayaka, Chihaya Adachi
    • Journal Title

      Advanced Functional Materials

      Volume: 28 Issue: 32 Pages: 1802130-1802130

    • DOI

      10.1002/adfm.201802130

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Simple molecular-engineering approach for enhancing orientation and out-coupling efficiency of thermally activated delayed fluorescent emitters without red-shifting emission2018

    • Author(s)
      Yi-Ting Lee, Po-Chen Tseng, Takeshi Komino, Masashi Mamada, Ruby J. Ortiz, Man-kit Leung, Tien-Lung Chiu, Chi-Feng Lin, Jiun-Haw Lee, Chihaya Adachi, Chao-Tsen Chen, Chin-Ti Chen
    • Journal Title

      ACS Appl. Mater. Interfaces

      Volume: 10 Issue: 50 Pages: 43842-43849

    • DOI

      10.1021/acsami.8b16199

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High Performance p- and n-Type Light-Emitting Field-Effect Transistors Employing Thermally Activated Delayed Fluorescence2018

    • Author(s)
      Jan Sobus, Fatima Bencheikh, Masashi Mamada, Robert Wawrzinek, Jean-Charles Ribierre, Chihaya Adachi, Shih-Chun Lo, and Ebinazar Namdas
    • Journal Title

      Advanced Functional Materials

      Volume: 28 Issue: 28 Pages: 1800340-1800340

    • DOI

      10.1002/adfm.201800340

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Efficient Exciplex Systems Based on Phenylpyridinato Boron Derivatives via Excited-State2019

    • Author(s)
      Masashi Mamada, Guojian Tian, Hajime Nakanotani, Jianhua Su, and Chihaya Adachi
    • Organizer
      日本化学会年会第99春季年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Low amplified spontaneous emission threshold and efficient electroluminescence from2018

    • Author(s)
      Masashi Mamada, Toshiya Fukunaga, Atula S. D. Sandanayaka, Chihaya Adachi
    • Organizer
      日本化学会年会第98春季年会
    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] Organic light-emitting field-effect transistors2018

    • Inventor(s)
      ファティマベンシュイク、儘田正史、安達千波矢、J-Cリビエル
    • Industrial Property Rights Holder
      ファティマベンシュイク、儘田正史、安達千波矢、J-Cリビエル
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2018-001017
    • Filing Date
      2018
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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