Host: The Japan Society of Vacuum and Surface Science
The electronic state of molecular assembles is governed by weak intermolecular interaction, namely an intermolecular distance, a grain size, and an adsorption distance to the substrate. In a previous study, we investigated the correlation between the thin-film structure and the electronic state by controlling the substrate temperature and the deposition amount in a monolayer system of pentacene on a single crystal graphite substrate, and as a result, it was suggested that the intermolecular lateral distance strongly influences the electronic state. In this study, we conducted similar experiments for monolayer of anthradithiophene , which is alike to pentacene, to investigate the impact of the chemical structure on the aggregate film structure as well as the electronic state. We will demonstrate that considering a shape of organic molecule, how the aggregate structure of a monolayer affects to the electronic state HOMO by comparing anthraditiophene and pentacene.
