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Citation: Zhang Li, Yang Maizhi, Qiao Xuebin, Hao Yanzhong, Gao Enqin, Cai Shengmin, Meng Fanshun, Tian He. Dye Cosensitization of Nanoporous SnO₂ Photoelectrode[J]. Chinese Journal of Applied Chemistry, ;1999, 16(4): 1-5. shu

Dye Cosensitization of Nanoporous SnO₂ Photoelectrode

1.
a College of Chemistry and Molecular Engineering, Peking University, Beijing 100871;
2.
b Institute of Fine Chemicals, East China University of Science and Technology, Shanghai

Received Date: 15 January 1999
Available Online: 27 April 1999
Fund Project: 国家自然科学基金资助项目(29773003) (29773003)

The photoelectrochemical behavior of the nanostructure SnO₂ porous film cosensitized by a cyanine dye (PMC) and cis-di(thiocyanato)bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(Ⅱ) dye (RuL₂(SCN)₂) have been investigated. The ground state level and the excited state level of the dyes were determined by cyclic voltammetry and optical absorption spectroscopy. The results showed that the excited state levels of both dyes matched the conduction band edge of SnO₂ nanoparticle. The optical absorption band of PMC situates in the region of 550 to 700 nm and that of RuL₂(SCN)₂ in the region of 400 to 600 nm. Therefore the cosensitization of these two dyes can widen the optical absorption region. As a result, the photocurrent intensity of nanostructure SnO₂ electrode was increased obviously by co-sensitization in both visible and near infra-red regions. Consequently the light-to-electricity conversion efficiency was improved evidently. The maximum value of IPCE has reached 68%.
- dye cosensitization,
- nanostructure SnO₂ porous film electrode,
- photoelectrochemisty,
- light-to-electricity conversion
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Dye Cosensitization of Nanoporous SnO₂ Photoelectrode