[20a-P7-1~37] 12.1 Fabrications and Structure Controls

[20a-P7-1] Temperatue-Dependent Thin-Film Structures of the Liquid Crystalline Organic Semiconducting Material

〇Shimpei Miura¹, Ryoya Oba¹, Yuji Yamaguchi², Daiki Kuzuhara¹, Mamoru Kikuchi¹, Tomoyuki Koganezawa³, Ichiro Hirosawa³, Noriyuki Yoshimoto¹ (1.Iwate Univ., 2.TCI, 3.JASRI)

Keywords:Organic semiconductor, X-ray diffraction, Crystal growth

It is necessary for improvement in abilities of organic semiconductor devices to clarify processes of crystal growth of organic thin films. 2-Decyl-7-phenyl-[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT-10) is a superior liquid crystalline organic semiconductor, which has a very high hole mobility. It is known that Ph-BTBT-10 exhibits phase transitions from crystal phase to smectic E (SmE) after thermal annealing at 143ºC. In this stydy, we investigated the thin film growth process during vacuum depositon and temperature dependence of the thin-film structures with a temperature control stage of Ph-BTBT-10 by in-situ real-time two-dimensional grazing incidence X-ray diffraction (2D-GIXD) measurements at SPring-8.