The effect of ZnO-coating on the performance of a dye-sensitized solar cell |
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| Authors: | Chuen-Shii Chou Feng-Cheng Chou Yi-Geng Ding Ping Wu |
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| Affiliation: | 1. Research Center of Solar Photo-Electricity Applications, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;2. Powder Technology R&D Laboratory, Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;3. Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, Singapore 138682, Singapore;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, PR China;3. Tianjin Institute of Power, Tianjin 300072, PR China;1. State Key Laboratory of Mechanical Transmission, College of Physics, Chongqing University, Chongqing, 400044, PR China;2. Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, PR China;1. School of Mathematic and Physics, Changzhou University, Jiangsu 213164, China;2. Department of Science and Technology, Baoshan University, Yunnan 678000, China;1. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan;2. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan |
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| Abstract: | This study investigates the effect of a ZnO-coated TiO2 working electrode on the power conversion efficiency of a dye-sensitized solar cell (DSSC). This electrode was designed and fabricated by dipping the TiO2 electrode with the TiCl4 treatment in a solution of zinc acetate dehydrate Zn(CH3COO)2·2H2O] and ethanol. The effects of the concentration of Zn(CH3COO)2·2H2O and the duration of dipping on the band gap of a working electrode and the power conversion efficiency of a DSSC were also examined. The band gap of the working electrode increases to 3.75 eV TiO2 electrode dipped in 0.05 M Zn(CH3COO)2·2H2O) for 3 min] from 3.22 eV (TiO2 electrode). Interestingly, the power conversion efficiency of the DSSC with a Zn-coated TiO2 electrode (6.7%) substantially exceeds that of the conventional DSSC with a TiO2 electrode (5.9%), and it may be originated from an increased energy barrier between ZnO and TiO2 that reduces the electron recombination rate. |
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