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Promoting Effect of Layered Titanium Phosphate on the Electrochemical and Photovoltaic Performance of Dye-Sensitized Solar Cells

Author(s): Cheng Ping | Chen Ruihao | Wang Junfei | Yu Jianong | Lan Tian | Wang Wanjun | Yang Haijun | Wu Haixia | Deng Changsheng

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 5;
Issue: 8;
Start page: 1313;
Date: 2010;
Original page

Keywords: Diffusion | Charge transfer | Layered α-titanium phosphate | Ionic liquid

Abstract We reported a composite electrolyte prepared by incorporating layered α-titanium phosphate (α-TiP) into an iodide-based electrolyte using 1-ethyl-3-methylimidazolium tetrafluoroborate(EmimBF4) ionic liquid as solvent. The obtained composite electrolyte exhibited excellent electrochemical and photovoltaic properties compared to pure ionic liquid electrolyte. Both the diffusion coefficient of triiodide (I3 −) in the electrolyte and the charge-transfer reaction at the electrode/electrolyte interface were improved markedly. The mechanism for the enhanced electrochemical properties of the composite electrolyte was discussed. The highest conversion efficiency of dye-sensitized solar cell (DSSC) was obtained for the composite electrolyte containing 1wt% α-TiP, with an improvement of 58% in the conversion efficiency than the blank one, which offered a broad prospect for the fabrication of stable DSSCs with a high conversion efficiency.
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