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Advances in Materials Science and Engineering
Volume 2012 (2012), Article ID 902146, 4 pages
http://dx.doi.org/10.1155/2012/902146
Research Article

Performance Degradation of Dye-Sensitized Solar Cells Induced by Electrolytes

1Graduate Institute of Materials Engineering, National Ping-Tung University of Science and Technology, Pingtung 912, Taiwan
2Institute of Electro-Optical Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 811, Taiwan

Received 14 June 2012; Revised 7 August 2012; Accepted 7 August 2012

Academic Editor: Yu-Pei Huang

Copyright © 2012 Ru-Yuan Yang 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

We investigated the change of the electric characteristics in dye-sensitized solar cell (DSSC) when the electrolyte has been injected and measured initially and lately for a period of time. It was found that the short-circuit current density decreased from 9.799 mA/cm2 to 7.056 mA/cm2 and the fill factor increased from 0.406 to 0.559 when the cell had stood for an hour, while the open-circuit photovoltage did not change due to fixed difference between the Fermi level of TiO2 and the oxidation-reduction potential of electrolyte. The results can be explained by using the variation of the series resistance in the equivalent circuit of the DSSC.