Photoelectrochemical Studies on the SnO<sub>2</sub> Nanostructured Porous Film Sensitized by Cyanine Dye

ZHANG Li, YANG Maizhi, QIAO Xuebin, HAO Yanzhong, GAO Enqin, CAI Shengmin

(College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871)

MENG Fangshun, TIAN He

(Institute of Fine Chemicals, East China University of Science & Technology, Shanghai,200237)

Abstract:: The photoelectrochemical behaviors of the SnO₂ nanostructured porous film sensitized by cyanine dye were investigated in this paper. The results showed that the excitation state level matched the conduction band edge of SnO₂ nanoparticle. Therefore the sensitization of this dye can increase the photocurrent intensity of SnO₂ nanostructured electrode obviously and results in a red-shift of optical absorption from the ultra-violet region to the visible region. As a result, the light-to-electricity conversion efficiency was improved evidently, the maximum value of IPCE has reached 28.9%.
Key words:: dye sensitization; SnO₂ nanostructured porous film electrode; photoelectrochemisty; cyanine dye

(R.D.1999-03-29 P.D.2000-03-20 Vol.36 No.2 pp.160-166)