Preparation of Cauliflower-like ZnO Films by Chemical Bath Deposition: Photovoltaic Performance and Equivalent Circuit of Dye-sensitized Solar Cells  

作　　者：Yuqiao Wang Xia Cui Yuan Zhang Xiaorui Gao Yueming Sun 

机构地区：[1]School of Chemistry and Chemical Engineering, Southeast University [2]School of Chemistry and Chemical Engineering, Yangzhou University [3]School of Science, Hebei University of Engineering

出　　处：《Journal of Materials Science & Technology》2013年第2期123-127,共5页材料科学技术（英文版）

基　　金：support of the National Basic Research Program of China (973 Program,No.2013CB932902);the National Natural Science Foundation of China (No. 21173042);the National Natural Science Foundation of Jiangsu (No. BK201123694);the National Natural Science Foundation of Hebei (No.B2012402006);the Jiangsu Key Laboratory of Environmental Material and Environmental Engineering (No.JHCG201012);the Foundation of Southeast of University (Nos.3212001102 and 3212002205)

摘　　要：The uniform cauliflower-like ZnO films were deposited on the conducting substrate by a chemical bath deposition in urea/water solution. The film structure and morphology were characterized by X-ray diffraction, thermo- gravimetric differential thermal analysis, energy dispersive spectroscopy, selected area electron diffraction, field emission scanning electron microscopy and high resolution transmission electron microscopy. The average diameter of ZnO nanoparticles and the petal thickness were 25 nm and 8 μm, respectively. Dye- sensitized solar cells based on the cauliflower-like ZnO film electrode showed the short-circuit current density of 6.08 mA/cm2, the open-circuit photovoltage of 0.66 V, the fill factor of 0.55 and the overall conversion efficiency of 2.18%. The equivalent circuit of cells based on the ZnO film electrodes was measured by the electrochemical impedance spectroscopy. Furthermore, the analysis of equivalent circuit provided the relationship between the cell performance and the interracial resistance, such as the shunt resistance and the series resistance.The uniform cauliflower-like ZnO films were deposited on the conducting substrate by a chemical bath deposition in urea/water solution. The film structure and morphology were characterized by X-ray diffraction, thermo- gravimetric differential thermal analysis, energy dispersive spectroscopy, selected area electron diffraction, field emission scanning electron microscopy and high resolution transmission electron microscopy. The average diameter of ZnO nanoparticles and the petal thickness were 25 nm and 8 μm, respectively. Dye- sensitized solar cells based on the cauliflower-like ZnO film electrode showed the short-circuit current density of 6.08 mA/cm2, the open-circuit photovoltage of 0.66 V, the fill factor of 0.55 and the overall conversion efficiency of 2.18%. The equivalent circuit of cells based on the ZnO film electrodes was measured by the electrochemical impedance spectroscopy. Furthermore, the analysis of equivalent circuit provided the relationship between the cell performance and the interracial resistance, such as the shunt resistance and the series resistance.

关 键 词：ZnO Solar cell Bath deposition Electrochemical impedance Equivalent circuit 

分 类 号：TB43[一般工业技术] TM914.4[电气工程—电力电子与电力传动]