Elucidate the electronic functions at organic semiconductor interfaces by means of a precise electronic state evaluation

2017 Fiscal Year Final Research Report

• Project/Area Number: 26248062
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Institute for Molecular Science
• Principal Investigator: Kera Satoshi 分子科学研究所, 光分子科学研究領域, 教授 (10334202)
• Co-Investigator(Renkei-kenkyūsha): Okudaira Koji 千葉大学, 融合科学研究科, 准教授 (50202023) ; Nakayama Yasuo 千葉大学, 融合科学研究科, 助教 (30451751)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 表面物理学 / 有機半導体 / 電子状態 / シンクロトロン放射光 / 光電子分光 / 電荷輸送 / 薄膜構造 / 分子間相互作用

Outline of Final Research Achievements

We have studied the electronic structure of organic semiconductor materials and their interfaces related by means of high-sensitive ultraviolet photoelectron spectroscopy and various surface analysis methods and photoelectron spectroscopies using synchrotron facilities. The fine features of the electronic structure are detected by preparing the well-defined molecular monolayer and single crystals of complicated large molecules. A novel research to explore the charge transport mechanism is opened because i) the origin of the organic semiconductor nature is revealed by detecting the gap state and ii) the fine feature of electron-phonon coupling is observed experimentally. We enter an unexplored research area for discussing a modulation of molecular orbital spread based on quasiparticle picture by weak electronic coupling as well as strong electron-phonon coupling of the large molecular groups.

Free Research Field

有機薄膜物性