Perovskite-type SrTiO3, CaTiO3 and BaTiO3 porous film electrodes for dye-sensitized solar cells

摘要

Phase-pure perovskite-type SrTiO₃, CaTiO₃ and BaTiO₃ electrodes have been applied for dye-sensitized solar cells, to obtain higher V _OC than TiO₂ electrode. Furthermore, TiO₂/SrTiO₃ and TiO₂/BaTiO₃ composite electrodes have been also prepared. SrTiO₃, CaTiO₃ and BaTiO₃ powders synthesized by solid-state reaction method at 1200°C for 2 h were used to prepare the solar cells. Phase-pure SrTiO₃ and BaTiO₃ cells showed higher V _OC than that from TiO₂, but showed lower J _SC and efficiency. To utilize the positive effect to increase the V _OC, P25 TiO₂/SrTiO₃ and P25 TiO₂/BaTiO₃ composite DSC were prepared. For each series, ~30 wt % addition was favorable to increase the photo-electric conversion efficiency.