| Project/Area Number |
15K05607
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Organic and hybrid materials
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| Research Institution | Kyoto University |
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Principal Investigator |
Sato Tohru 京都大学, 福井謙一記念研究センター, 教授 (70303865)
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| Co-Investigator(Renkei-kenkyūsha) |
KAJI Hironori 京都大学, 化学研究所, 教授 (30263148)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 有機EL / 発光分子 / 振電相互作用 / 振電相互作用密度 / 輻射遷移 / 無輻射遷移 / 熱活性型遅延蛍光 / 内部転換 / 分子設計 |
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| Outline of Final Research Achievements |
Recently, thermally-activated delayed fluorescence (TADF) has attracted much attention as an emitting mechanism of organic light-emitting diodes (OLED). However, it is difficult for the TADF to realize the deep blue emission. In this study, we proposed a novel emitting mechanism, fluorescence via higher triplets (FvHT) mechanism, and its design principles. Based on the design principles, we designed a novel molecule which consists of the non-fluorescent triphenylamine moiety and non-fluorescent substituents. We have suceeded in observing 65% of the exciton utilization ratio which exceeds the limit of fluorescent OLED, 25%.
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