Investigation of photovoltaic properties of silver-doped ZnTiO_3 nanoparticles

摘要

Doping appropriate elements into semiconductor nanoparticles is of vital importance to develop novel materials and functional devices. In this research, the two step sol-gel method was applied to synthesize novel Ag doped ZnTiO_3 nanoparticles in the presence of zinc acetate, tetra normal butyl titanate, and silver nitrate as the starting reagents and cetyl alcohol as the solvent. Besides, in order to examine the photovoltaic properties of FTO/TiO_2/ ZnTiO_3/Pt-FTO and FTO/TiO_2/Ag-ZnTiO_3/Pt-FTO solar cell structures ZnTiO_3 and Ag-ZnTiO_3 thin films, which prepared by Doctor's blade method, were directly deposited on top of the TiO_2. Furthermore, the hysteresis loop of the ZnTiO_3 nanoparticles at room temperature showed a ferromagnetic behavior. Moreover, photoluminescence results showed that Ag metal ion could change optical band gap of ZnTiO_3 nanoparticles and cause red-shift to occur.