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

Maria Lada; Marco J. Starink; Miguel Carrasco; Lichun Chen; Pawel Miskiewicz; Paul Brookes; Małgorzata Franz; David C. Smith

doi:10.1039/c1jm11119a

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

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−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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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF MATERIALS CHEMISTRY no. 21, pages 11232 - 11238,
ISSN: 0959-9428
Language:: English
Publication year:: 2011
Bibliographic description:: Lada M., Starink M., Carrasco M., Chen L., Miskiewicz P., Brookes P., Obarowska M., Smith D.: Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors // JOURNAL OF MATERIALS CHEMISTRY. -Vol. 21, nr. Iss. 30 (2011), s.11232-11238
DOI:: Digital Object Identifier (open in new tab) 10.1039/c1jm11119a
Verified by:: Gdańsk University of Technology