Photo-assisted molecular engineering in solution-processed organic thin-film transistors with a blended semiconductor for high mobility anisotropy

Park, J.; Keum, C.-M.; Kim, J.-H.; Lee, S.-D.; Payne, M.; Petty, M.C.; Anthony, J.E.; Bae, J.-H.

Abstract

This paper reports a viable method for enhancing mobility anisotropy in solution-processed organic thin-film transistors (TFTs) by irradiating linearly polarized ultraviolet (LPUV) light onto a 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene)/poly (vinyl cinnamate) (PVCi) blended semiconductor film. The needle-like crystalline domains in the blended semiconductor film were aligned along the polarization direction of the LPUV light, suggesting that TIPS-pentacene molecules are oriented anisotropically due to an intermolecular interaction and aggregation with the photo-aligned PVCi molecules. The mobility anisotropy reached up to about 50, which is the highest value achieved in solution-processed organic TFTs with a polymeric insulator.

Citation

Park, J., Keum, C., Kim, J., Lee, S., Payne, M., Petty, M., …Bae, J. (2013). Photo-assisted molecular engineering in solution-processed organic thin-film transistors with a blended semiconductor for high mobility anisotropy. Applied Physics Letters, 102(1), Article 013306. https://doi.org/10.1063/1.4774001

• Journal Article Type: Article
• Publication Date: Jan 7, 2013
• Deposit Date: Jul 25, 2014
• Publicly Available Date: Sep 9, 2014
• Journal: Applied Physics Letters
• Print ISSN: 0003-6951
• Electronic ISSN: 1077-3118
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 102
• Issue: 1
• Article Number: 013306
• DOI: https://doi.org/10.1063/1.4774001
• Keywords: Thin film transistors, Anisotrophy, Organic semiconductors, Carrier mobility, Insulators.
• Public URL: https://durham-repository.worktribe.com/output/1447313