Dye-Sensitized Photoelectrochemical Cells Based on Porous SnO2/ZnO Composite and TiO2 Films with a Polymer Electrolyte

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• 作者：K. Tennakone ; G. K. R. Senadeera ; V. P. S. Perera ; I. R. M. Kottegoda ; and L. A. A. De Silva
• 刊名：Chemistry of Materials
• 出版年：1999
• 出版时间：September 1999
• 年：1999
• 卷：11
• 期：9
• 页码：2474 - 2477
• 全文大小：69K
• 年卷期：v.11,no.9(September 1999)
• ISSN：1520-5002

文摘

Polyacrylonitrile polymer electrolyte based photoelectrochemical cells have been fabricatedwith ruthenium bipyridyl complex as the sensitizer using porous films of SnO₂/ZnO compositeand also TiO₂ films. The redox component of the electrolyte is XI + I₂, where X⁺ = Cs⁺, K⁺,Na⁺, Li⁺, or tetrabutylammonium ion. For both types of cells (SnO₂/ZnO and TiO₂) highestshort-circuit photocurrents and efficiencies are obtained when X = Cs and in all cases theseparameters were higher for the cells made from SnO₂/ZnO. Results are explained asoriginating from the dependence of the mobility of I^- in the polymer electrolyte on nature ofthe cation X⁺ and the necessity of wide separation of photogenerated electron and theresulting dye cation to overcome the diffusion-controlled kinetics of I^- transport.