TiO2 nanorod arrays/ZnO nanosheets heterostructured photoanode for quantum-dot-sensitized solar cells
TiO2 nanorod arrays/ZnO nanosheets heterostructured photoanode for quantum-dot-sensitized solar cells
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DOI：
10.1016/j.solener.2018.03.056
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发表时间：
2018-05
期刊：
影响因子：
6.7
通讯作者：
Yang Zhang;X. Zhong;Dongguo Zhang;Weijie Duan;Xiaolei Li;Shuaizhi Zheng;Jinbin Wang
中科院分区：
文献类型：
--
作者：
Yang Zhang;X. Zhong;Dongguo Zhang;Weijie Duan;Xiaolei Li;Shuaizhi Zheng;Jinbin Wang
三维异质结构光阳极被认为是解决一维纳米材料比表面积不足、电子复合率高等问题的有效途径。结合纳米棒和纳米片的优点，采用可控化学浴沉积法在适当温度下构建了一种新型的TiO 2纳米棒阵列/ZnO纳米片（TNRAs/ZNSs）异质结作为量子点敏化太阳能电池（QDSSCs）的光阳极.通过紫外-可见吸收光谱、电流密度-电压曲线（J-V）、开路电压衰减曲线（V-t）和电化学阻抗谱（EIS）等测试手段，研究了其光电化学性能。结果表明，TNRAs/ZNS光阳极具有更大的比表面积和更慢的电子复合速率，其功率转换效率比TNRAs基QDSSC提高了260%。这种三维异质结构具有明显的优点，我们相信它可以用于其他光电器件。
The three-dimensional heterostructured photoanode is considered to be an effective way to solve the problems of insufficient specific surface area and high electron recombination rate from one-dimensional nanomaterials. By combining the advantages of nanorods and nanosheets, we construct a novel TiO2nanorod arrays/ZnO nanosheets (TNRAs/ZNSs) heterostructure as the photoanode in quantum-dot-sensitied solar cells (QDSSCs) by a controllable chemical bath deposition method at an appropriate temperature. The photoelectrochemical properties are measured by UV–Vis absorption spectra, current density–voltage (J-V),open-circuit voltage attenuation test (V-t) and electrochemical impedance spectroscopy (EIS). The results reveal that the TNRAs/ZNSs photoanode has larger specific surface area and slower electronic recombination rate, and its power conversion efficiency increases by 260% compared with TNRAs-based QDSSCs. This three-dimensional heterostructure exhibits distinct advantages and we believe that it can be used in other photoelectronic devices.