2023 Fiscal Year Final Research Report
Study of triplet exciton harvesting in organic devices using zero-field optically and electrically detected magnetic resonance
| Project/Area Number |
21K05011
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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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| Review Section |
Basic Section 32020:Functional solid state chemistry-related
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| Research Institution | Shizuoka Institute of Science and Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 発光検出磁気共鳴 / 電流検出磁気共鳴 / シングレットフィッション / 三重項ハーベスト / 三重項励起子 / 有機半導体 / 電荷再結合 |
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| Outline of Final Research Achievements |
In the development of organic photoelectric devices, which are expected to contribute to the realization of a low-carbon society, triplet exciton harvesting is a key issue for increasing device efficiency. However, the dynamics of triplet harvesting in organic devices under operating conditions is difficult to elucidate even by high-resolution optical spectroscopic techniques. In this study, we developed zero field optically and electrically detected magnetic resonance with parallel static and oscillating magnetic fields as a new spectroscopic method for observing the dynamics of triplet harvesting, and successfully elucidated the mechanisms of charge recombination in organic devices and singlet fission in tetracene polycrystalline powder.
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| Free Research Field |
物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発したゼロ磁場における発光・電流検出磁気共鳴法を用いれば、有機デバイス中の電荷キャリア再結合と三重項ハーベストへの応用が期待されるシングレットフィッションのダイナミクスを区別して直接検出できることを実証した。三重項ハーベストの計測法を確立した本研究成果の学術的意義は極めて大きく、三重項ハーベストを志向した有機光電変換素子の開発に寄与できると期待される。
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