Performance optimization of lead free-MASnI3 based solar cell with 27% efficiency by numerical simulation

The photovoltaic devices based on organic-inorganic halide perovskite materials have witnessed a rapid increase in performance and are marching towards commercialization. Recently, lead-free perovskites have drawn huge attention as one of the major research topics over toxic lead-based materials. Here, we report the optimized device performance of methylammonium tin iodide (MASnI3) based perovskite solar cell by using numerical simulation. The influence of different key parameters, such as different hole transport layers (HTLs), doping density, thickness of different layers including defect density on the device performances is thoroughly analysed through numerical simulation. The optimized device architecture with copper (I) oxide (Cu2O) as the hole transport layer and TiO2 as electron transport layer shows the highest power conversion efficiency of 27.43%, short circuit current density of 25.97 mA/cm2, open-circuit voltage of 1.203 V, and fill factor of 87.79%. This indicates that by optimizing the device parameters, it is possible to achieve high performance lead-free perovskite solar cells experimentally in future research.