Development of high-performance organic light-emitting transistors by harvesting triplet excited states
| Project/Area Number |
17K14531
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Organic and hybrid materials
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| Research Institution | Kyushu University |
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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)
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| 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)
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| 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 |
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| 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%.
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| 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。
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Report
(3 results)
Research Products
(9 results)
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[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
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Journal Title
ACS Appl. Mater. Interfaces
Volume: 10
Issue: 50
Pages: 43842-43849
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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