Abstract
A novel ZnO photoanode with high specific surface area and good light scattering ability was fabricated for dye-sensitized solar cells(DSSCs).The photoanode comprised of mesoporous ZnO microspheres which were prepared by a solvothermal process.The structures and morphologies of ZnO microspheres were measured and confirmed by means of x-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectrum(EDS),and multi-point Brunauer-Emmett-Teller(BET) analysis.ZnO microspheres are in sub-micrometer scale and have BET specific surface area of ~50m2·g-1.Furthermore,a~3μm thick photoanode made from ZnO microspheres resultes in a preliminary short-circuit current density(Jsc) of ~4.5mA·cm-2 with an open-circuit voltage(Voc) of ~602mV and a conversion efficiency of 1.28% in DSSCs.All these suggest that mesoporous ZnO microspheres can be an alternative and feasible photoanode material for DSSCs.
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