CZTSe Kesterite as an Alternative Hole Transport Layer for MASnI3 Perovskite Solar Cells

A MASnI 3 -based perovskite solar cell with structure CZTSe / MASnI 3 / TiO 2 / FTO was proposed in this work. To accomplish this task, first, the effect of different kesterite and stannite CZTS , CBTS , CFTS , CMTS , CNTS , CZTSe compounds as hole transport layer HTL simulations were performed in a solar cell capacitance simulator. All simulations were performed in 1.5 G 1 sun light spectrum. From the results it was found that valance band offset of the absorber/ HTL interface affects the performance of the solar cell, and among different HTL , CZTSe is proven to be a suitable candidate for HTL. After selection of CZTSe as HTL for a MASnI 3 solar cell, device optimization was performed by analyzing the absorber and HTL thicknesses and doping concentrations on device performance. After analysis, improved functional parameters were attained with a conversion efficiency of 19.52%, short-circuit current of 29.45 mA / cm 2 open circuit voltage of 0.86 V and fill factor of 76.74%. The concept presented in this work for modeling of MASnI 3 -based devices, will categorically provide ways for the feasible fabrication of a high-efficiency solar cell.