Surface decoration on polymeric gate dielectrics for flexible organic field-effect transistors via hydroxylation and subsequent monolayer self-assembly

Yan, Y., Huang, L.-B., Zhou, Y., Han, S.-T., Zhou, L., Sun, Q., Zhuang, J., Peng, H., Yan, H. and Roy, V.A.L. (2015) Surface decoration on polymeric gate dielectrics for flexible organic field-effect transistors via hydroxylation and subsequent monolayer self-assembly. ACS Applied Materials and Interfaces, 7(42), pp. 23464-23471. (doi: 10.1021/acsami.5b05363) (PMID:26439239)

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Abstract

A simple photochemical reaction based on confined photocatalytic oxidation (CPO) treatment and hydrolysis was employed to efficiently convert C-H bonds into C-OH groups on polymeric material surfaces, followed by investigation of monolayer self-assembly decoration on polymeric dielectrics via chemical bonding for the organic field-effect transistors (OFETs) applications. This method is a low temperature process and has negligible etching effect on polymeric dielectric layers. Various types of self-assembled monolayers have been tested and successfully attached onto the hydroxylated polymeric dielectric surfaces through chemical bonding, ensuring the stability of decorated functional films during the subsequent device fabrication consisting of solution processing of the polymer active layer. With the surface decoration of functional groups, both n-type and p-type polymers exhibit enhanced carrier mobilities in the unipolar OFETs. In addition, enhanced and balanced mobilities are obtained in the ambipolar OFETs with the blend of polymer semiconductors. The anchored self-assembled monolayers on the dielectric surfaces dramatically preclude the solvent effect, thus enabling an improvement of carrier mobility up to 2 orders of magnitude. Our study opens a way of targeted modifications of polymeric surfaces and related applications in organic electronics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vellaisamy, Professor Roy
Authors: Yan, Y., Huang, L.-B., Zhou, Y., Han, S.-T., Zhou, L., Sun, Q., Zhuang, J., Peng, H., Yan, H., and Roy, V.A.L.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:ACS Applied Materials and Interfaces
Publisher:American Chemical Society
ISSN:1944-8244
ISSN (Online):1944-8252
Published Online:13 October 2015
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