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International Journal of Photoenergy
Volume 2013, Article ID 296314, 7 pages
Research Article

Preparation and Characterization of Chitosan Binder-Based Electrode for Dye-Sensitized Solar Cells

1Department of Electrical Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea
2The Research Institute of Advanced Engineering Technology, Chosun University, Gwangju 501-759, Republic of Korea
3Southwestern Research Institute of Green Energy, Mokpo 530-400, Republic of Korea
4Department of Chemical and Biochemical Engineering, Chosun University, Gwangju 590-170, Republic of Korea
5Gist Technology Institute, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea
6Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea
7School of Materials Science & Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea

Received 21 May 2013; Revised 3 August 2013; Accepted 1 September 2013

Academic Editor: Mark van Der Auweraer

Copyright © 2013 En Mei Jin 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.


A chitosan binder-based TiO2 photoelectrode is used in dye-sensitized solar cells (DSSCs). Field-emission scanning electron microscope (FE-SEM) images revealed that the grain size, thickness, and distribution of TiO2 films are affected by the chitosan content. With addition of 2.0 wt% chitosan to the TiO2 film (D2), the surface pore size became the smallest, and the pores were fairly evenly distributed. The electron transit time, electron recombination lifetime, diffusion coefficient, and diffusion length were analyzed by IMVS and IMPS. The best DSSC, with 2.0 wt% chitosan addition to the TiO2 film, had a shorter electron transit time, longer electron recombination lifetime, and larger diffusion coefficient and diffusion length than the other samples. The results of 2.0 wt% chitosan-added TiO2 DSSCs are an electron transit time of  s, electron recombination lifetime of  s, diffusion coefficient of  cm2 s−1, diffusion length of 14.81 μm, and a solar conversion efficiency of 4.18%.