2018 Fiscal Year Final Research Report

Design Strategy fot the Electronic Functional p-Bricolage Molecular Systems by Combined Microwave Spectroscopy Techniques

Planned Research

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Project Area	pi-System Figuration: Control of Electron and Structural Dynamism for Innovative Functions
Project/Area Number	26102011
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	Kyoto University (2015-2018) Osaka University (2014)
Principal Investigator	SEKI Shu 京都大学, 工学研究科, 教授 (30273709)
Co-Investigator(Kenkyū-buntansha)	櫻井庸明京都大学, 工学研究科, 助教 (50632907) 佐伯昭紀大阪大学, 産業科学研究所, その他 (10362625) 酒巻大輔京都大学, 工学研究科, 特定助教 (60722741)
Research Collaborator	TSUTSUI Yusuke CHOI Wookjin
Project Period (FY)	2014-07-10 – 2019-03-31
Keywords	マイクロ波 / 複合分光 / 移動度 / 電子共役 / ラマン分光 / 過渡吸収 / 伝導度 / 圧力
Outline of Final Research Achievements	We have developed in this study a unique and powerful spectroscopy complex: time resolved microwave conductivity (TRMC) measurement system under high pressure, Field-Induced TRMC to probe carrier mobility at interfaces, FI-TRMC combined with impedance spectroscopy to solve interfacial issues of charge carrier transport, and ternary combined spectroscopy system of ESR-Transient Absorption Spectroscopy, and TRMC under Chemical Doping for understanding of the landscape of charge and spin transport. The complex has been demonstrated to elucidate mechanisms of charge carrier transport in a variety of p-systems in terms of their structural modulation by external stimuli, thermal perturbation of molecular systems, dimensionality of molecular aggregate structures, as well as electronic and spin state of charge carriers injected. We presume to open the present spectroscopy complex to scientific community, accelerating the development of pi-conjugated molecular systems.
Free Research Field	物理化学
Academic Significance and Societal Importance of the Research Achievements	本研究で開発したTRMC法を核としさまざまな分光法を高度に複合化した電磁波分光法は、共役分子性物質の迅速、かつ熱的・機械的・スピン・電子的状態を包括的に含めた診断法として極めて有効であることを実証した。分子性材料においても電子バンド構造を十分に構築できることを示し、集積次元性の制御と熱揺動に卓越する分子間相互作用の繰り込みにより、有機共役分子性材料が既存の無機半導体電子材料に比肩しうる可能性を明確に示唆した。特に材料診断における迅速性は、人的・その他の資源が限られる日本の研究者にとって、分子性電子材料開発における優位性を維持するうえで最も重要であり、本研究成果はこれに応える唯一の方法である。