Towards High Efficiency CZTS Solar Cell with HTL Using SCAPS-1D

In this study, numerical simulations on designs based on window layer, buffer layer, absorber layer and hole transport layer were conducted with the objective to enhance the performance of a solar cell based on CZTS, to reduce excessive series resistance over the absorber layer and determine the highest conversion efficiency. To examine the optimum power conversion efficiency, ZnS and ZnMgO serves as a hybrid buffer layer, ZnO acts as a window layer, CZTS as an active layer and MoS2 serves as a hole transport layer. We have calculated all the performance parameters of the solar cell based on variations in the capture cross section of electrons/holes at an absorber layer (CZTS) and variations in thickness of hole transport layer (MoS
2
). The ZnO:AI/ZnS/ZnMgO/CZTS/MoS
2
photovoltaic cell has highest performance at 32.15% conversion efficiency.