Thiophene-Phenylene and Thiophene-Thiazole Oligomeric Semiconductors with High Field-Effect Transistor On/Off Ratios

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Title:	Thiophene-Phenylene and Thiophene-Thiazole Oligomeric Semiconductors with High Field-Effect Transistor On/Off Ratios
Authors:	Hong, X. M.;Katz, H. E.;Lovinger, A. J.;王伯昌;Wang, B. C.;Raghavachari, K.
Contributors:	淡江大學化學學系
Date:	2001-11-08
Issue Date:	2009-12-01
Publisher:	American Chemical Society (ACS)
Abstract:	A series of thiophene-containing oligomers that are less electron rich than alpha-6T were synthesized, and the thin film morphologies and field-effect transistor characteristics of the oligomers were evaluated. Phenyl and thiazole rings were included in many of the oligomers, and a new synthesis of perfluoroalkylmethyl-terminated oligomers was developed. Desirably low off currents were associated with calculated highest occupied molecular orbital energies above ca. 5.0 eV relative to vacuum. Some of the oligomers displayed mobilities above 0.01 cm2 (Vs)-1, but there was no correlation of mobility with calculated orbital energies and some compounds with seemingly continuous morphologies had low mobilities nonetheless. One compound, 1,4-bis(5‘-hexyl-2,2‘-bithiophen-5-yl)benzene, showed promising behavior as a solution-deposited semiconductor, with mobility up to 0.02 cm2 (Vs)-1 and an on/off ratio up to 20 000.
Relation:	Chemistry of materials 13(12), pp.4686-4691
DOI:	10.1021/cm010496z
Appears in Collections:	[Graduate Institute & Department of Chemistry] Journal Article

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