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http://dx.doi.org/10.4313/JKEM.2012.25.2.153

Electrochemical Properties of Dye-sensitized Solar Cells with Improving the Surface Structure  

Zhao, Xing Guan (Department of Electrical Engineering, Chonnam National University)
Jin, En Mei (Department of Electrical Engineering, Chonnam National University)
Gu, Hal-Bon (Department of Electrical Engineering, Chonnam National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.25, no.2, 2012 , pp. 153-158 More about this Journal
Abstract
We use UV(ultraviolet)-$O_3$ treatment to increase the surface area and porosity of $TiO_2$ films in dye-sensitized solar cells (DSSCs). After the UV-$O_3$ treatment, surface area and porosity of the $TiO_2$ films were increased, the increased porosity lead to amount of dye loading and solar conversion efficiency was improved. Field emission scanning electron microscopy images clearly showed that the nanocrystalline porosity of films were increased by UV-$O_3$ treatment. The Brunauer, Emmett, and Teller surface area of the $TiO_2$ films were increased from $0.71cm^2/g$ to $1.31cm^2/g$ by using UV-$O_3$ treatment for 20 min. Also, UV-$O_3$ treatment of $TiO_2$ films significantly enhanced their solar conversion efficiency. The efficiency of the films without treatment was 4.9%, and was increased to 5.6% by UV-$O_3$ treatment for 20 min. Therefore the process enhanced the solar conversion efficiency of DSSCs, and can be used to develop high sensitivity DSSCs.
Keywords
Dye-sensitized solar cells; UV-$O_3$ treatment; Surface structure;
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