Preparation and performance of dye-sensitized solar cells based on ZnO-modified TiO_2 electrodes  

作　　者：Sheng-jun Li Yuan Lin Wei-wei Tan Jing-bo Zhang Xiao-wen Zhou Jin-mao Chen Zeng Chen 

机构地区：[1]College of Physics and Electrics, He＇nan University, Kaifeng 475004, China [2]Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2010年第1期92-97,共6页矿物冶金与材料学报（英文版）

基　　金：supported by the Major State Basic Research Development Program of China (No.2006CB202605);the National Natural Science Foundation of China (No.50473055)

摘　　要：The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage （Voc） and fill factor （if） of the cells were improved sig- nificantly. The performances of the ZnO-modified TiO2 electrode such as dark current, transient photocurrent, impedance, absorption spectra, and fiat band potential （Vfb） were investigated. It is found that the interface charge recombination impedance increases and Vfb shifts about 200 mV toward the cathodic potential. The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO2 film.The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage （Voc） and fill factor （if） of the cells were improved sig- nificantly. The performances of the ZnO-modified TiO2 electrode such as dark current, transient photocurrent, impedance, absorption spectra, and fiat band potential （Vfb） were investigated. It is found that the interface charge recombination impedance increases and Vfb shifts about 200 mV toward the cathodic potential. The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO2 film.

关 键 词：dye-sensitized solar cells TiO2 electrode MODIFICATION photoelectrochemical properties 

分 类 号：O657.1[理学—分析化学] TM911.4[理学—化学]