Combinatorial screening of the effect of temperature on the microstructure and mobility of a high performance polythiophene semiconductor
- 1 January 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (1) , 012112
- https://doi.org/10.1063/1.2404934
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 cm 2 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.Keywords
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