Abstract

At present, the photovoltaic market is dominated by solar cells made of crystalline silicon. However, even in light of the major decrease in the price of crystalline silicon, the high production and installation costs lead to long payback times in most regions, decreasing the economic feasibility of widespread use. Recently, a new class of hybrid organic halide perovskite was introduced as light harvesting material, showing strong absorption in a broad region of the visible spectrum, good electron and hole conductivity, delivering also high open circuit voltages in photovoltaic devices. The solution-based device fabrication in solid-state perovskite solar cell is very attractive advantage of manufacturing compared with other solar cell. Perovskite solar cells are consist of CH3NH3PbX3 loaded on a mesoporous TiO2 layer in conjunction with the hole transporting material (HTM) between the two electrodes. One approach to improving the efficiency is to increasing the charge collection. The electron diffusion length and recombination lifetime influence the performance in perovskite solar cell. In this paper, we report the synthesis and characterization of metal solutions doping and coating on the perovskite solar cell. We expect that the metal-treated mesoscopic TiO2 could improve the charge injection from CH3NH3PbX3 perovskite into mesoscopic TiO2 electron conductor due to the increased driving force. In addition, it is expected that the charge transport of mesoscopic TiO2 is improved due to the increased conductivity