Photoelectrochemical property study of the urchin-like Zn/ZnO/TiO2 in dye-sensitised solar cells Online publication date: Wed, 23-Sep-2015
by Tian Zhao; Fei Wang; Yiqing Chen; Likun Ma; Chao Chen; Chao Liu
International Journal of Nanomanufacturing (IJNM), Vol. 11, No. 3/4, 2015
Abstract: A novel urchin-like Zn/ZnO/TiO2 hierarchical structure directly growing on fluorine-doped tin oxide (FTO) glass is prepared by a simple sintering process, and the dye-sensitised solar cells (DSSCs) based on such a structure present desirable photoelectrochemical (PEC) properties. The research confirms that the DSSCs based on an urchin-like Zn/ZnO structure in which the ZnO nanowires are coated with TiO2 shell can enhance the photovoltaic performance, attributed to the fact that the core-shell structure can modify the energy band levels, suppress charge recombination and prolong the electron lifetime. Comparison of TiO2 shell with different thickness, the highest conversion efficiency of the cells can reach about 0.82%. The origin of the striking difference in performance could be due to the different shell thickness, which is analysed and discussed in the paper. The study confirms that such a novel photoanode structure can retard the recombination process and increase the conversion efficiency.
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