The 83rd JSAP Autumn Meeting 2022

Presentation information

Oral presentation

12 Organic Molecules and Bioelectronics » 12.2 Characterization and Materials Physics

[22p-C106-1~16] 12.2 Characterization and Materials Physics

Thu. Sep 22, 2022 1:30 PM - 6:00 PM C106 (C106)

Yoichi Yamada(Univ. of Tsukuba), Yasuyuki Yokota(RIKEN), Fukutani Keisuke(IMS)

3:45 PM - 4:00 PM

[22p-C106-9] Observation of Gap States in Polar Organic Thin Films
via Photoelectron Yield Measurements using Deep UV Light and Its Problems

〇(M1)Masaya Kitaoka1, Nakazawa Ryotaro1, Kaimori Ryota1, Kurihara Keisuke1, Watanabe Kenta1, Ishii Hisao1,2,3 (1.Chiba Univ GSSE, 2.Chiba Univ CFS, 3.Chiba Univ MCRC)

Keywords:semiconductor, photoelectron spectroscopy, polarity

In this study, we investigated photoelectron emission from typical OLED materials, Alq3 and TPBi, in detail and examined the origin of electron emission, which is thought to be BEE. When "photoelectron yield spectroscopy (PYS)" and "constant end-state photoelectron yield spectroscopy (CFSYS)," which are methods for measuring photoelectron yield in the deep UV region, are used to measure DOS at the in-gap states, the BEE phenomenon is considered to be an obstacle to the determination of the DOS of the initial state. Therefore, we also examined the problems to measure the DOS correctly by measuring PYS and CFSYS.