title: Evaluation of the intrinsic charge carrier transporting properties of linear- and bent-shaped π-extended benzo-fused thieno[3,2-b]thiophenes.
abstract: The intrinsic charge carrier transporting properties of two isomeric linear- and bent-shaped 7-ring benzo-fused thieno[3,2-b] thiophenes and their octyl-substituted analogues were newly investigated using flash-photolysis (FP-) and field-induced (FI-) time-resolved microwave conductivity (TRMC) techniques. FP-TRMC study in the solid state revealed that octyl-substitution potentially improved the photoconductivity due to the enhanced crystalline lamellar packing. After this screening process, local-scale hole mobilities at the thienoacene-poly(methylmethacrylate) insulator interfaces were precisely recorded using FI-TRMC, reaching up to 4.5 cm(2) V(-1) s(-1) for the linear-shaped non-alkylated thienoacene. The combination of FP- and FI-TRMC measurements provides a rapid and quantitative evaluation scheme even for a variety of compounds with some issues in the processing conditions, leading to the optimized structure of the compounds used as active (interfacial) layers in practical electronic devices.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan. t-sakurai@chem.eng.osaka-u.ac.jp seki@chem.eng.osaka-u.ac.jp miura@chem.eng.osaka-u.ac.jp.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Tsutsui
authors.forename: Tsuneaki
authors.initials: T
authors.lastname: Sakurai
authors.forename: Sojiro
authors.initials: S
authors.lastname: Minami
authors.forename: Koji
authors.initials: K
authors.lastname: Hirano
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Satoh
authors.forename: Wakana
authors.initials: W
authors.lastname: Matsuda
authors.forename: Kenichi
authors.initials: K
authors.lastname: Kato
authors.forename: Masaki
authors.initials: M
authors.lastname: Takata
authors.forename: Masahiro
authors.initials: M
authors.lastname: Miura
authors.forename: Shu
authors.initials: S
authors.lastname: Seki