Preparation and Photoelectric Properties of ZnO/TiO_2 Nanotubes Film Electrodes

ZnO/TiO2 nanotubes were prepared using ZnO nanorods as raw materials,which were synthesized by hydrothermal methods.Then its performance as an electrode of a dye-sensitized solar cell was investigated.The obtained products were characterized by SEM,XRD,EDX and N2 adsorption.Furthermore,the photoelectric properties of ZnO/TiO2 nanotubes film electrodes calcined at different temperatures were investigated by UV-Vis adsorption spectra and electrochemical workstation.It is found that the DSSC based on ZnO/TiO2 nanotubes calcined at 600℃ have optimum photoelectric properties,Jsc=2.28 mA/cm2 and Voc= 0.631 V,yielding the 0.66% maximum conversion efficiency.Additionally,after TiCl4 posttreatment,the performance of DSSC made from ZnO/TiO2 nanotubes are improved obviously and the photoelectric conversion efficiency is up to 1.06%.