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本文首先以水热反应法获得了掺钒的ZnO纳米片薄层,然后通过Na_2S处理和进一步的水热反应在纳米片表面生长出ZnO纳米棒分支结构,以此获得了一种新颖独特的ZnO纳米片-纳米棒三维分等级结构.ZnO纳米棒分支结构的引入,有效地提高了光阳极薄膜的漫反射性能.随后利用电沉积法沉积CdSe量子点研究了其光电化学性能,基于分等级结构光阳极的CdSe量子点敏化太阳电池(QDSSC)的短路电流密度、开路电压以及最终的光电转换效率都比ZnO纳米片光阳极有了显著提升.详细分析了不同的ZnO纳米棒分支生长时间(1,2,4,6和8 h)对器件光电性能的影响.测试结果显示,ZnO纳米棒生长时间为6h所得的分等级样品获得了最高的光电转换效率,在与Cu_2S对电极组装成QDSSC时效率达到了4.26%.
In this paper, first, a vanadium-doped ZnO nanosheet was obtained by hydrothermal method. Then, the nanostructures of ZnO nanorods were grown by Na_2S treatment and further hydrothermal reaction to obtain a novel and unique ZnO Nanosheets - the three-dimensional hierarchical structure of nanorods.ZnO nanorods branch structure of the introduction, effectively improve the diffuse reflection properties of the photoanode thin film.Secondly, CdSe quantum dots deposited by electrodeposition method to study its photoelectrochemical properties, based on the hierarchical structure The short circuit current density, the open circuit voltage and the final photoelectric conversion efficiency of the photoanode CdSe quantum dot sensitized solar cell (QDSSC) are significantly higher than the ZnO nanosheet photoanode.Different ZnO nanorod branch growth time 1, 2, 4, 6, and 8 h) on the photovoltaic performance of the device.The results showed that the highest photoelectric conversion efficiency was obtained when the ZnO nanorods grew for 6h, When the efficiency reached 4.26%.