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Issue 30, 2011
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Morphology control via dual solventcrystallization for high-mobility functionalized pentacene-blend thin film transistors

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Abstract

We present an approach to improving the performance of solution processed organic semiconductor transistors based on a dual solvent system. We here apply this to a blend containing the π-conjugated small molecule 6,13 bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) and polystyrene, which acts as an inert binder. Using a semiconductor-binder solution of two solvents, where the main solvent is a better solvent of the small molecule and second solvent is a better solvent of the polymer, crystal morphologies can be altered and transistor mobilities increased by almost an order of magnitude. In this way, air-ambient and solution-processed transistors with linear and saturation mobilities higher than 1 cm2 V−1s−1 have been fabricated. We discuss how the solubility properties of the formulation components can be used to identify solvent candidates that promote an efficient self-assembly of the small molecule.

Graphical abstract: Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors

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Supplementary files

Article information


Submitted
15 Mar 2011
Accepted
09 May 2011
First published
24 Jun 2011

J. Mater. Chem., 2011,21, 11232-11238
Article type
Paper

Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors

M. Lada, M. J. Starink, M. Carrasco, L. Chen, P. Miskiewicz, P. Brookes, M. Obarowska and D. C. Smith, J. Mater. Chem., 2011, 21, 11232
DOI: 10.1039/C1JM11119A

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