Dye-sensitized photoelectrochemical cells based on porous SnO{sub 2}/ZnO composite and TiO{sub 2} films with a polymer electrolyte
Polyacrylonitrile polymer electrolyte based photoelectrochemical cells have been fabricated with ruthenium bipyridyl complex as the sensitizer using porous films of SnO{sub 2}/ZnO composite and also TiO{sub 2} films. The redox component of the electrolyte is XI + I{sub 2}, where X{sup +} = Cs{sup +}, K{sup +}, Na{sup +}, Li{sup +}, or tetrabutylammonium ion. For both types of cells (SnO{sub 2}/ZnO and TiO{sub 2}) highest short-circuit photocurrents and efficiencies are obtained when X = Cs and in all cases these parameters were higher for the cells made from SnO{sub 2}/ZnO. Results are explained as originating from the dependence of the mobility of I{sup {minus}} in the polymer electrolyte on nature of the cation X{sup +} and the necessity of wide separation of photogenerated electron and the resulting dye cation to overcome the diffusion-controlled kinetics of I{sup {minus}} transport.
- Research Organization:
- Inst. of Fundamental Studies, Kandy (LK)
- OSTI ID:
- 20001171
- Journal Information:
- Chemistry of Materials, Vol. 11, Issue 9; Other Information: PBD: Sep 1999; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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