CdSZnO核壳纳米棒阵列结构的制备及在太阳能电池中的应用

Preparation of CdS/ZnO core-shell nanorod arrays structure and its application in solar cell

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%。

ZnO nanorod arrays on the FTO substrate were prepared by hydrothermal method.The CdS nanocrystals were electrochemically deposited on the ZnO nanorod arrays to form the CdS/ZnO core-shell nanorod arrays structure.The morphology,crystal structure and composition of as-obtained samples were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD）,energy dispersive X-ray spectroscopy（EDS）and ultraviolet-visible spectrophotometer（UV-Vis）.The CdS/ZnO core-shell nanorod arrays structure were fabricated to solar cell,and the property of as-prepared solar cell with different thickness of CdS nanocrystals were studied.The result indicated that the light absorption were broadened and enhanced,and the transmission of photo-generated carriers were regulated.When CdS nanocrystals were deposited for 60 s,the photoelectric conversion efficiency could reach up to 1.10%.