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International Journal of Photoenergy
Volume 2009 (2009), Article ID 650509, 5 pages
http://dx.doi.org/10.1155/2009/650509
Research Article

Influence of MWCNTs Doping on the Structure and Properties of PEDOT:PSS Films

1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China
2School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, China

Received 26 March 2009; Revised 6 August 2009; Accepted 7 September 2009

Academic Editor: Mohamed Sabry Abdel-Mottaleb

Copyright © 2009 Jiao Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) doped with multi-walled carbon nanotubes (MWCNTs) films is fabricated on quartz substrates by spin coating method. The effects of MWCNTs on the structure and properties of PEDOT:PSS film have been investigated. X-ray diffractometer (XRD) and Fourier transform Raman spectroscopy (FTRM) show that the crystallization behavior and the main chain of PEDOT:PSS are not changed. Atomic force microscopy (AFM) shows that individual nanotubes are well dispersed in the PEDOT:PSS matrix. Moreover, some nanotubes overlap into a net-like structure, forming new conductive channels, which can enhance efficiently the film conductivity. The conductivity of PEDOT:PSS film doped with a lower percentage of MWCNTs (0.2 wt%) is 9.16 S/cm, higher than that of pure PEDOT:PSS film (0.28 S/cm), although the optical transmission of PEDOT:PSS decreases a little after the addition of MWCNTs. The interaction between MWCNTs and PEDOT:PSS during melt mixing is also given a possible explanation.