Preparation of ZnO Nanosheets-Nanorods Hierarchically Structured Films and Application in Quantum Dots Sensitized Solar Cells

摘要

ZnO nanosheets were electrodeposited on transparent conductive glass substrates. Thereafter, ZnO nanorods were grown vertically on the nanosheets by hydrothermal method to prepare the nanosheets- nanorods hierarchically structured ZnO films. The influence factors, such as the concentration of precursor solution and the hydrothermal reaction time, were studied. The obtained nanosheets- nanorods hierarchically structured ZnO films were co-sensitized with CdS and CdSe quantum dots and applied as the photoanodes of dye-sensitized solar cells. A photoelectric conversion efficiency of 2.50% was obtained after the coating of TiO2 on the ZnO nanosheets-nanorods.