ZnO@TiO2 Architectures for a High Efficiency Dye-Sensitized Solar Cell
ZnO@TiO2 Architectures for a High Efficiency Dye-Sensitized Solar Cell
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用于高效染料敏化太阳能电池的 ZnO@TiO2 架构
DOI：
10.1016/j.electacta.2015.05.014
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发表时间：
2015-07-20
影响因子：
6.6
通讯作者：
Zhao, Lingzhi
中科院分区：
文献类型：
--
作者：
Lei, Jianfei;Liu, Shuli;Zhao, Lingzhi
本文报道了一种改进的电化学工艺来制备ZnO籽晶衬底和ZnO纳米线（ZnO NW），而不是旋涂步骤。垂直排列的ZnO纳米线通过电化学沉积在ZnO籽晶衬底上，直接形成负载纳米锥状TiO 2颗粒的骨架，从而获得ZnO@TiO2异质结构。当用作染料敏化太阳能电池（DSSC）的光阳极材料时，ZnO@TiO2结构表现出增强的DSSC功率转换效率（PCE）。太阳能电池测试的结果表明，添加TiO 2壳的ZnO纳米线显着增加短路电流（从2.6至4.7 mA cm（-2）），开路电压（从0.53 V至0.77 V）和填充因子（从0.30至0.59）。在100 mW cm（-2）AM 1.5 G照明下，PCE从裸ZnO纳米线的0.4%跃升至ZnO@TiO2架构的2.16%。(C)2015爱思唯尔有限公司版权所有。
Instead of the spin coating step, an improved electrochemical process is reported in this paper to prepare ZnO seeded substrates and ZnO nanowires (ZnO NWs). Vertically aligned ZnO NWs are deposited electrochemically on the ZnO seeded substrates directly forming backbones for loading nanoconic TiO2 particles, and hence ZnO@TiO2 heterogeneous architectures are obtained. When used as photoanode materials of the dye-sensitized solar cells (DSSCs), ZnO@TiO2 architectures exhibit enhanced power conversion efficiency (PCE) of the DSSCs. Results of the solar cell testing show that addition of TiO2 shells to the ZnO NWs significantly increases short circuit current (from 2.6 to 4.7 mA cm(-2)), open circuit voltage (from 0.53 V to 0.77 V) and fill factor (from 0.30 to 0.59). The PCE jumped from 0.4% for bare ZnO NWs to 2.16% for ZnO@TiO2 architectures under 100 mW cm(-2) of AM 1.5 G illumination. (C) 2015 Elsevier Ltd. All rights reserved.