Abstract
In many organic electronic devices, interfaces formed by organic layers can play crucial roles. We have been studying various organic interfaces for clarifying the molecular arrangement and electronic structure. In this talk, we will report a few topics from our recent efforts for understanding these interfaces, namely (1) Theoretical calculations on interfaces formed by depositing long-chain alkanes on metals, and (2) Study of the effect of various types of doping for a variety of dopants — residual impurity, atmospheric gases, and metallic and organic intentional dopants. In particular, detailed and quantitative information about the effect of oxygen from the viewpoint of electronic structure was obtained for titanyl phthalocyanine (TiOPc), and the results corresponded well with the recent report of atmospheric effect on organic field effect transistor.
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