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

Record type: Article

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 ?-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?1 s?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.

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Citation

Lada, Maria, Starink, Marco J., Carrasco, Miguel, Chen, Lichun, Miskiewicz, Pawel, Brookes, Paul, Obarowska, Margaret and Smith, David C. (2011) Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors Journal of Materials Chemistry, 21, (30), pp. 11232-11238. (doi:10.1039/C1JM11119A).

More information

Published date: 2011
Additional Information: We show how to achieve TIPS-pentacene-based transistors with record mobilities up to 1.8 cm2/Vs by exploiting differential solubility properties in a two solute, two solvent (i.e. quaternary) solution.
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 198217
URI: http://eprints.soton.ac.uk/id/eprint/198217
PURE UUID: 90082bfa-6845-4449-a2cd-07f71ed84bf3

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Date deposited: 03 Oct 2011 11:10
Last modified: 18 Jul 2017 11:20

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Contributors

Author: Maria Lada
Author: Miguel Carrasco
Author: Lichun Chen
Author: Pawel Miskiewicz
Author: Paul Brookes
Author: Margaret Obarowska
Author: David C. Smith

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