[16p-P05-1~20] 12.2 Characterization and Materials Physics

[16p-P05-6] Surface and Interface Electronic States of Au(111) Covered with ZnPc Thin Films

〇Isamu Yamamoto¹, Naoki Matsufuji¹, Junpei Azuma¹, Masaki Imamura¹, Kazutoshi Takahashi¹ (1.Saga Univ.)

Keywords:

organic semiconductor,photoemission spectroscopy,phthalocyanine

The thickness dependence of the Shockley surface state (SS) at the interface between zinc phthalocyanine (ZnPc) thin films and Au(111) substrate was investigated by angle-resolved two-photon photoemission spectroscopy. The SS shifted toward higher energy with increasing film thickness even above a monolayer. A resonant enhancement of photoelectron intensity was also observed due to the direct transition from the SS to the image potential state.