Dye-sensitized photoelectrochemical cells based on porous SnO2/ZnO composite and TiO2 films with a polymer electrolyte

被引:99
作者
Tennakone, K [1 ]
Senadeera, GKR [1 ]
Perera, VPS [1 ]
Kottegoda, IRM [1 ]
De Silva, LAA [1 ]
机构
[1] Inst Fundamental Studies, Kandy, Sri Lanka
关键词
D O I
10.1021/cm990165a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Polyacrylonitrile polymer electrolyte based photoelectrochemical cells have been fabricated with ruthenium bipyridyl complex as the sensitizer using porous films of SnO2/ZnO composite and also TiO2 films. The redox component of the electrolyte is XI + I-2, where X+ = Cs+, K+, Na+, Li+, or tetrabutylammonium ion. For both types of cells (SnO2/ZnO and TiO2) highest short-circuit photocurrents and efficiencies are obtained when X = Cs and in all cases these parameters were higher for the cells made from SnOz/ZnO. Results are explained as originating from the dependence of the mobility of I- in the polymer electrolyte on nature of the cation X+ and the necessity of wide separation of photogenerated electron and the resulting dye cation to overcome the diffusion-controlled kinetics of I- transport.
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页码:2474 / 2477
页数:4
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