The effect of ZnO-coating on the performance of a dye-sensitized solar cell

被引：50
作者：
Chou, Chuen-Shii [1 ,2 ]
Chou, Feng-Cheng [2 ]
Ding, Yi-Geng [2 ]
Wu, Ping [3 ]
机构：
[1] Natl Pingtung Univ Sci & Technol, Res Ctr Solar Photoelect Applicat, Pingtung 912, Taiwan
[2] Natl Pingtung Univ Sci & Technol, Dept Mech Engn, Powder Technol R&D Lab, Pingtung 912, Taiwan
[3] Singapore Univ Technol & Design, Singapore 138682, Singapore
来源：
SOLAR ENERGY | 2012年 / 86卷 / 05期
关键词：
Dye-sensitized solar cell; ZnO-coated TiO2 electrode; Band gap; ZnO energy barrier; Power conversion efficiency; P JUNCTION ELECTRODES; CHARGE RECOMBINATION; COMPOSITE-PARTICLES; EFFICIENCY; FABRICATION; ENERGY; FILMS; COST; NIO;
D O I：
10.1016/j.solener.2012.02.003
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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)center dot 2H(2)O] and ethanol. The effects of the concentration of Zn(CH3COO)(2)center dot 2H(2)O 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)center dot 2H(2)O) 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. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1435 / 1442
页数：8
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