Elucidation of the mechanism of carrier injection and extraction at organic/electrode interfaces

2015 Fiscal Year Final Research Report

• Project/Area Number: 25288114
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Chiba University
• Principal Investigator: Ishii Hisao 千葉大学, 先進科学センター, 教授 (60232237)
• Co-Investigator(Kenkyū-buntansha): NOGUCHI YUTAKA 千葉大学, 先進科学センター, 助教 (20399538) ; NAKAYAMA YASUO 東京理科大学, 理工学部, 講師 (30451751) ; Rasika K. K. 千葉大学, 先進科学センター, 特任助教 (90631557)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 高感度光電子分光 / 表面・界面 / 有機エレクトロニクス / キャリア注入 / キャリア取り出し

Outline of Final Research Achievements

In order to understand and improve electronic devices using organic semiconductors, it is indispensable to answer basic questions about "carrier" to carry electricity; "How is carrier injected to organics?", "How is carrier extracted from organics?" etc. The mechanism of carrier injection and extraction has been so far discussed on the basis of the energy position of frontier molecular orbital of organic materials. In this study, the electronic structures of films and interfaces of several organic materials were investigated by our unique technique, high sensitivity photoelectron spectroscopy, and the mechanism was discussed on the basis of the observed density of states as well as frontier orbital positions.

Free Research Field

有機半導体物性