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Journal of Nanomaterials
Volume 2013 (2013), Article ID 258581, 6 pages
http://dx.doi.org/10.1155/2013/258581
Research Article

Improved Performance of Dye-Sensitized Solar Cells Using a Diethyldithiocarbamate-Modified Surface

1Graduate School of Science and Technology, Shizuoka University, Hamamatsu 432-8011, Japan
2Faculty of Science, University of Peradeniya, 20400 Peradeniya, Sri Lanka
3Research Institute of Electronics, Shizuoka University, Hamamatsu 432-8011, Japan

Received 21 November 2012; Revised 26 February 2013; Accepted 13 March 2013

Academic Editor: Qifeng Zhang

Copyright © 2013 D. M. B. P. Ariyasinghe 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

The surface modification of a TiO2 electrode with diethyldithiocarbamate (DEDTC) in dye-sensitized solar cells (DSSCs) was studied. Results from X-ray photoelectron spectroscopy (XPS) indicate that over half of the sulfur atoms become positively charged after the DEDTC treatment of the TiO2 surface. DSSCs were fabricated with TiO2 electrodes modified by adsorbing DEDTC using a simple dip-coating process. The conversion efficiency of the DSSCs has been optimized to 6.6% through the enhancement of the short-circuit current density (  mA/cm2). This is substantially higher compared to the efficiency of 5.9% (  mA/cm2) for the DSSCs made with untreated TiO2 electrodes.