2017 Fiscal Year Final Research Report
Theoretical studies on thermally-activated delayed fluorescence and molecular design for next generation organic light-emitting diodes
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 |
Section | 一般 |
Research Field |
Organic and hybrid materials
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Research Institution | Kyoto University |
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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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 |
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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Free Research Field |
理論化学
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