[21a-W631-1~11] 12.2 Characterization and Materials Physics

△ [21a-W631-5] Investigation into Unprecedented Charge Carrier Mobility of Thienoacene Molecules with Microwave Resonance Techniques

〇Yusuke Tsutsui¹, Wookjin Choi¹, Tsuneaki Sakurai¹, Shu Seki¹ (1.Kyoto Univ.)

Keywords:organic semiconductor,thienoacene,carrier transport

[1]Benzothieno[3,2-b]benzothiophene (BTBT), one of the thienoacenes with sulfur atoms in its ring, has high stability to the atmosphere and excellent mobility. Especially, 2,7-C8-BTBT has been reported to show high hole mobilities as 31.3 cm² V^–1 s^–1 on the ink-jet printed single-crystal film and 43 cm² V^–1 s^–1 on the polymer-blended spincoated film. In the present study, we focused on the four isomers of C12-BTBT and discussed the correlation between their packing structures and local charge carrier mobilities with Time-Resolved Microwave Conductivity (TRMC) to elucidate high charge carrier mobility of BTBT.