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Electrically conducting transparent films of biphenyl / 3-octylthiophene copolymers synthesized by cyclic voltammetry

S. KARAMANOU1,* , J. SIMITZIS1

Affiliation

  1. National Technical University of Athens, School of Chemical Engineering, Department III, “Materials Science and Engineering”, Laboratory Unit “Advanced and Composite Materials", 9 Heroon Polytechniou

Abstract

Electrically conducting transparent films of biphenyl and 3-octylthiophene copolymers and also films of the homopolymers polyphenylene, and poly(3-octylthiophene), for comparison reasons, were synthesized by electropolymerization. The films were studied by FTIR, UV-Vis, SEM-EDAX and their electrical conductivity was determined. Based on the change of scan rate, the electropolymerization mechanism was determined as a diffusion – controlled process for scan rates up to 100 mVs-1, and as controlled by charge transfer for scan rates between 150 up to 200 mV s-1. The copolymers had higher conductivity (appr. 10-2 S/cm) than that of the corresponding polyphenylene and one order of magnitude lower than that of poly(3-octylthiophene)..

Keywords

Conducting copolymers, 3-octylthiophene, Biphenyl, Electropolymerization mechanism.

Submitted at: June 1, 2014
Accepted at: July 10, 2014

Citation

S. KARAMANOU, J. SIMITZIS, Electrically conducting transparent films of biphenyl / 3-octylthiophene copolymers synthesized by cyclic voltammetry, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 7-8, pp. 933-938 (2014)