[11a-A33-1~13] 12.2 Characterization and Materials Physics

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)

[11a-A33-12] Electronic Energy Level Measurements of Pentacene Films Prepared by Photoconversion of a Soluble Precursor

〇Takuto Ohguro¹, Shinjiro Suzuki³, Hiroko Yamada³, Ryotaro Nakazawa¹, Hiroyuki Yoshida^1,2 (1.GSE,Chiba Univ., 2.MCRC,Chiba Univ., 3.ICR,Kyoto Univ.)

Keywords:

organic semiconductor,photo converted,electronic energy levels

Acene-based materials are attracting attention as electronic materials and as structural motifs of graphene nanoribbons. In this study, electronic energy levels were measured for photoconverted pentacene thin films prepared via a precursor route. The conversion from pentacene diketone to pentacene was confirmed by UV–Vis absorption spectroscopy. UPS and LEIPS measurements were performed to evaluate the ionization energy, electron affinity, and energy gap. The feasibility of electronic-state evaluation for acene-based materials prepared via precursor methods was demonstrated. These results provide a basis for future electronic energy level measurements of higher acenes, whose direct synthesis and characterization are often challenging.