Issue 14, 2010

Amorphous dithenylcyclopentadienone-carbazolecopolymer for organic thin-film transistors

Abstract

We developed a new high performance amorphous donor–acceptor conjugated copolymer consisting of a dithienylcylclopentadienone subunit as an electron acceptor and carbazole derivative as an electron donor. X-Ray diffraction analysis shows no scattering patterns, indicating that a disordered amorphous solid is formed. Atomic force microscopy (AFM) images show an amorphous surface mophology regardless of the annealing temperature. A high on/off current ratio of approximately 106 and high field effect mobility of 2.2 × 10−2 cm2 V−1 s−1 were obtained with stable output characteristics. The high performance of the amorphous copolymer is ascribed to the relatively low activation energy and low characteristic temperature obtained from a low temperature transport analysis, reflecting that localization of the charge carrier is not substantial in the film.

Graphical abstract: Amorphous dithenylcyclopentadienone-carbazole copolymer for organic thin-film transistors

Supplementary files

Article information

Article type
Paper
Submitted
10 Dec 2009
Accepted
13 Jan 2010
First published
16 Feb 2010

J. Mater. Chem., 2010,20, 2759-2765

Amorphous dithenylcyclopentadienone-carbazole copolymer for organic thin-film transistors

E. S. H. Kang, J. D. Yuen, W. Walker, N. E. Coates, S. Cho, E. Kim and F. Wudl, J. Mater. Chem., 2010, 20, 2759 DOI: 10.1039/B926066H

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