Evaluation of the intrinsic charge carrier transporting properties of linear- and bent-shaped π-extended benzo-fused thieno[3,2-b]thiophenes

Physical Chemistry Chemical Physics : PCCP
Yusuke TsutsuiShu Seki

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.

References

Nov 30, 2007·Angewandte Chemie·John E Anthony
Mar 22, 2008·Angewandte Chemie·Sybille AllardUllrich Scherf
Nov 13, 2009·Physical Review Letters·Yosuke MurakamiKazumasa Nomoto
Aug 16, 2011·Advanced Materials·Kazuo TakimiyaEigo Miyazaki
Apr 30, 2014·Physical Chemistry Chemical Physics : PCCP·Shu SekiDaisuke Sakamaki
May 3, 2014·Accounts of Chemical Research·Kazuo TakimiyaMasahiro Nakano
Jul 30, 2014·Chemical Communications : Chem Comm·Ryo SekiyaHiromitsu Maeda

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