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Journal of Nanomaterials
Volume 2013 (2013), Article ID 760685, 6 pages
http://dx.doi.org/10.1155/2013/760685
Research Article

Enhanced Efficiency of Dye-Sensitized Solar Cell by High Surface Area Anatase-TiO2-Modified P25 Paste

1College of Physics and Electronic Engineering, Hainan Normal University, Haikou, Hainan 571158, China
2School of Physical Science and Technology, Key Laboratory of Artificial Micro and Nano-Structures of the Ministry of Education, Wuhan University, Wuhan 430072, China

Received 26 February 2013; Accepted 16 March 2013

Academic Editor: Shishang Guo

Copyright © 2013 Mengmei Pan 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

How to improve the conversion efficiency and the stability of dye-sensitized solar cells (DSSCs) are two major problems. Furthermore, reduction of the manufacturing cost of DSSCs and large-scale manufacture are also very important factors. As a raw material, commercial P25 would be used for large-scale manufacture of TiO2 paste with simple preparation procedure. However, there are several drawbacks for P25 such as the low surface area of P25 powder and the poor connectivity among particles in film using tradition P25 paste without modification. In this paper, we introduced a simple modified method by adding high surface area anatase TiO2 into pure P25 paste. The photoelectric conversion performances of DSSCs based on these photo-electrodes were tested. The results show that the open-circuit voltage, the fill factor and the energy conversion efficiency of the modified electrode were increased. It is found that the modified P25 films have fast electron transportation and a slow charge recombination. We conclude that through adding the anatase TiO2 nanoparticles to the P25 paste with high surface area, it can not only improve the particles connectivity among inside the films, but also enhance the efficiency of DSSCs.