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采用水热法制备垂直于FTO导电玻璃基底的ZnO纳米棒阵列,然后通过电化学沉积法在ZnO纳米棒阵列上沉积CdS纳米晶,形成CdS/ZnO核壳纳米棒阵列结构。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、X射线能谱仪(EDS)和紫外-可见分光光度计(UV-Vis)等对所得样品的形貌、结构组成进行分析表征;并以其为光电极组装太阳能电池,研究CdS纳米晶厚度对该电池光电性能的影响。结果表明,所得样品不仅拓宽和加强电池的光吸收能力,也有效调控光生载流子的传输。当CdS纳米晶沉积时间为60s时,电池的光电转换效率最高可达1.10%。
The ZnO nanorod arrays perpendicular to the FTO conductive glass substrate were prepared by hydrothermal method. CdS nanocrystals were deposited on the ZnO nanorod arrays by electrochemical deposition to form CdS / ZnO core-shell nanorod arrays. The morphology and structure of the obtained samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (EDS) and UV-Vis spectrophotometer. The solar cell was assembled with the photoelectrode. The influence of CdS nanocrystal thickness on the photovoltaic performance was studied. The results show that the obtained sample not only broaden and enhance the light absorption capacity of the battery, but also effectively control the transport of photo-generated carriers. When the CdS nanocrystal deposition time is 60s, the photoelectric conversion efficiency of the battery can reach as high as 1.10%.