Combinatorial screening of the effect of temperature on the microstructure and mobility of a high performance polythiophene semiconductor

Leah A. Lucas, Dean M. DeLongchamp, Brandon M. Vogel, Eric K. Lin, Michael J. Fasolka, Daniel A. Fischer, Iain McCulloch, Martin Heeney, Ghassan E. Jabbour

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31 Scopus citations

Abstract

Using a gradient combinatorial approach, the authors report the effects of temperature on the microstructure and hole mobility of poly(2,5-bis(3- dodecylthiophen-2yl)thieno[3,2-b]thiophene) thin films for application in organic field-effect transistors. The gradient heating revealed a detailed dependence on thermal history. Optimal heat treatment achieved mobilities as high as 0.3 cm2 V-1 s-1. Mobility enhancement coincides with an increase in crystal domain size and orientation, all of which occur abruptly at a temperature closely corresponding to a bulk liquid crystal phase transition.

Original languageEnglish (US)
Article number012112
JournalApplied Physics Letters
Volume90
Issue number1
DOIs
StatePublished - 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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