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

Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors
Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors
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.
11232-11238
Lada, Maria
6c194d2a-d070-48fe-a6e4-ad8539c25686
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Carrasco, Miguel
a2f6d4c8-ce67-433d-a8e0-d20178258baf
Chen, Lichun
6d7912da-40ac-4c9d-ae69-5d7880e9dcff
Miskiewicz, Pawel
7b97097f-5703-4291-97a3-af29ac55a30a
Brookes, Paul
0eaa288b-8647-4b75-af94-42fe73aca076
Obarowska, Margaret
9e7fc836-5962-4e0c-b2c2-eb29f1e989d7
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Lada, Maria
6c194d2a-d070-48fe-a6e4-ad8539c25686
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Carrasco, Miguel
a2f6d4c8-ce67-433d-a8e0-d20178258baf
Chen, Lichun
6d7912da-40ac-4c9d-ae69-5d7880e9dcff
Miskiewicz, Pawel
7b97097f-5703-4291-97a3-af29ac55a30a
Brookes, Paul
0eaa288b-8647-4b75-af94-42fe73aca076
Obarowska, Margaret
9e7fc836-5962-4e0c-b2c2-eb29f1e989d7
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f

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), 11232-11238. (doi:10.1039/C1JM11119A).

Record type: Article

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 ?-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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Lada et al 2011.pdf - Version of Record
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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

Catalogue record

Date deposited: 03 Oct 2011 11:10
Last modified: 20 Nov 2021 03:50

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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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