[8p-N306-1~20] 12.2 Characterization and Materials Physics

4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)

[8p-N306-11] Effect of Molecular Orientation on Interface Energy Level Alignment between Copper(II) Phthalocyanine and Metal

〇Kaito Ban¹, Yuki Furukawa¹, Hiroyuki Yoshida^1,2 (1.Chiba Univ., 2.Chiba Univ.)

Keywords:

Work Function,Molecular Orientation,Kelvin Probe

The energy level alignment at the interface between metals and organic semiconductors affects charge injection characteristics. In this study, the work function of CuPc films deposited on substrates with significantly different work functions was measured using the Kelvin probe method over a thickness range exceeding 3000 nm. A change in work function was observed between 300 nm and 2500 nm. XRD measurements revealed that the molecular orientation was edge-on at 300 nm and face-on at 2500 nm. These results indicate that the molecular orientation of CuPc influences the interfacial energy level alignment.