TiO2 nanoparticle/ZnO nanowire hybrid photoanode for enhanced quantum dot-sensitized solar cell performance
TiO2 nanoparticle/ZnO nanowire hybrid photoanode for enhanced quantum dot-sensitized solar cell performance
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TiO2 纳米颗粒/ZnO 纳米线混合光电阳极可增强量子点敏化太阳能电池性能
DOI：
10.1039/c4ra05033a
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发表时间：
2014-09
期刊：
影响因子：
3.9
通讯作者：
Song, Xiaohui
中科院分区：
文献类型：
--
作者：
Wang, Minqiang;Yang, Chengao;Liu, Jing;Song, Xiaohui
A hybrid structured TiO2/ZnO photoanode was composed of highly ordered ZnO nanowires (NWs) and small TiO2 nanoparticles (NPs) filling the gaps among ZnO NWs. In this way, ZnO NWs provide a direct pathway to facilitate electron collection and transport and increase light scattering and trapping. TiO2 NPs provide a large specific surface to effectively adsorb quantum dots (QDs). In experiments, the density of ZnO NW arrays was first controlled by regulating the ratio of TiO2 NPs to ZnO NPs and the concentration of ZnO NPs in the hybrid NP seed precursor, and then the TiO2 paste was successfully use to fill the gaps among NWs by a large centrifugal force. Using TiO2 NP/ZnO NW films as photoanodes, we fabricated CdSe QD-sensitized solar cells and tested their photovoltaic (PV) performances. The results demonstrated a remarkably enhanced short-circuit current density (Jsc) of 7.9 mA cm−2 and power conversion efficiency (η) of 1.55%, and this η is enhanced by 19.2% and 30.3%, respectively, compared to those of a TiO2 NP device with an η of 1.3% and a ZnO NW device with an η of 1.19%.
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