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Citation: GUO Jia-Hao, HE Xiao-Ying, CAI Sheng-Min, GUO Min, CHEN Xiu-Ying, PENG Xiao-Jun. Nanocrystalline ZnO Electrode Sensitized by Novel Cyanine Dye[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 383-387. shu

Nanocrystalline ZnO Electrode Sensitized by Novel Cyanine Dye

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a College of Science, Anhui Science and Technology University, Fengyang;
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b College of Chemistry, China West Normal University, Nanchong;
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c College of Chemistry and Molecular Engineering, Peking University, Beijing 100871;
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d State Kay Laboratory of Fine Chemicals, Dalian University of Technology, Dalian

Corresponding author: CAI Sheng-Min,
Received Date: 5 June 2006
Available Online: 30 September 2006
Fund Project: 国家自然科学基金(20073003) (20073003)安徽省教育厅高校青年基金(2005jql089) (2005jql089)安徽科技学院引进人才专项基金(ZRC200438)资助项目 (ZRC200438)

The photoelectrochemical behavior of nanocrystalline ZnO electrode sensitized by Cy5(a novel squarylium cyanine dye) was reported.The sensitization conditions were optimized.The ground state level and the excited state level of the dye were determined by using cyclic voltammetry and optical absorption spectroscopy.The results show that the excited state level of this dye matches the conduction band edge of ZnO nano-particles.Therefore the sensitization of the dye can obviously increase the photocurrent density of the nanocrystalline ZnO electrode and result 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 greatly improved and the maximum value of IPCE reached 36.1% and η was 0.69% when the ZnO nanostructured porous film was 2.9 μm thick and sensitized for 0.5 h.
- dye sensitization,
- nanocrystalline ZnO,
- film electrode,
- photoelectrochemistry,
- cyanine dye
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