2022 Fiscal Year Final Research Report
Development of high-performance organic semiconductor electrets
| Project/Area Number |
21K19010
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 35:Polymers, organic materials, and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
田中 正樹 東京農工大学, 工学(系)研究科(研究院), 助教 (50830387)
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Keywords | 自発配向分極 / 振動発電 / 極性制御 / 有機低分子材料 / 分子配向 |
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| Outline of Final Research Achievements |
In this study, we aimed to improve the performance of organic electret materials, which are the core materials of vibrational power generation devices. Focusing on the spontaneous orientation polarization formed in organic small-molecular-deposited thin films, we propose a molecular framework that can more actively induce molecular orientation. Specifically, we adjusted the surface energy on the film surface by introducing an alkyl fluoride group into the molecular backbone. The developed organic self-orientated polarized film showed controlled polarization polarity and more than 10 V of self-orientated polarization at a film thickness of 100 nm. This value surpasses the performance of electret materials in practical use.
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| Free Research Field |
有機エレクトロニクス
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、有機低分子材料の成膜条件が自発配向分極特性に極めて大きく影響すること、さらに分子設計により分子配向を積極的に誘起し分極極性を制御できることを明確に示した。今後、極性の異なる自発配向分極薄膜をエレクトレットとして集積化することで、振動発電素子の発電効率を高めることができると期待される。また自発配向分極薄膜は、有機EL素子などの電荷注入特性にも大きく影響することから、本研究成果は有機EL素子などに代表される有機エレクトロニクスデバイス開発にも寄与できると期待される。
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