Presentation Information
[10p-PA4-5]Molecular Ordering and Electronic State of Rubrene on Rutile TiO2(110) with Oxygen Vacancies
〇Hiroto Otsuka1, Yuri Hasegawa1, Keisuke Fukutani2, Ryunosuke Sagehashi2, Satoshi Kera2, Yoichi Yamada1 (1.Univ. Tsukuba, 2.IMS)
Keywords:
STM,Photoemission Spectroscopy,Organic Semiconductor
In dye-sensitized solar cells, photoelectric conversion occurs at interfaces where dye molecules are adsorbed on TiO2 nanoparticles. To improve the photoelectric conversion efficiency, it is essential to understand the mechanism of interfacial energy level alignment. Although oxygen vacancies are formed on TiO2 surfaces, their influence on the energy level alignment at dye/TiO2 interfaces has not yet been fully clarified. In this study, we fabricated a monolayer film of rubrene, an electron-donating molecule, on oxygen-deficient rutile TiO2(110), and investigated its molecular arrangement and electronic structure.