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This study investigated the influence of the thickness of ZnO nanorods stacking films to increase the photovoltaic conversion efficiency of DSSCs.Efficient photoanodes by three-dimensional stacking of ZnO nanorods on conducting aluminum-doped ZnO(AZO)glass were studied for dye sensitized solar cells(DSSCs).ZnO nanorods stacking films with thickness varying from 30um to 64um,which were controlled by hydrothermal growth time and cycle times,were then prepared to find out the optimum loading density of N719 on the surface of ZnO.Annealing experiments showed that the AZO substrates remained to be good conductors until heated to 350℃.A highest photoelectric conversion efficiency of~2.0%together with Isc of~9.5mA/cm2 Voc of~0.5V and FF of~41.4%illuminated under AM1.5G solar light(power density of 100mW/cm2),was achieved for the DSSC using 50um-thick film stacking by ZnO nanorods as photoanode and N719 as sensitizer.The effect of the thickness together with the aspect ratio of the ZnO stacking nanorods on the photovoltaic property of the DSSCs was addressed to focus on the increase of superficial area and the thickness of the ZnO nanorods in order to enhance the loading of N719.A charge separation and transfer mechanism was also proposed for the ZnO nanorods stacking electrode-based DSSCs.