Numerical Studies of Optimising Various Buffer Layers to Enhance the Performance of Tin Sulfide (SnS)-Based Solar Cells

SnS based semiconductor absorber materials are an emerging candidate for photovoltaic application. It is earth-abundant and non-toxic elements. In the present work, among different buffer layer such as CdS, ZnS, ZnSe, In2S2, In2S3, Zn(O:S) have been studied to optimize the performance as well as to find out suitable buffer layer for SnS absorber. The simulation is done under the AM.1.5 illumination using SCAPS-1D simulator program. The effect of different parameters such as the effect of thickness of the buffer layer, the absorber layer, the concentration of dopants and the effect of temperature was studied. Using the optimum values of all parameter SnS based solar cell with different buffer layers have been optimized. This study reveals that CdS could be used as a buffer layer for highly efficient solar cell while ZnS can also be used as a buffer layer as it is non-toxic comparable to the CdS buffer layer.