Influence of dopants in buffer layer on CZTS solar cell performance

CZTS (Copper zinc Tin Sulphide) has commanded the next-generation solar-cell material because of its superior performance, lower cost, and abundant availability on the earth. This study examined the impact of different dopants in the buffer layer on the solar cells’ electrical characteristics. For the n-ITO/CdS (Ag-CdS, Cu-CdS, and Cl-CdS)/CZTS/ Mo proposed device structure of the solar cell, the doping concentration and thickness of the buffer and absorber layers were examined. Ag-CdS buffer layer was shown to be one of the best options for manufacturing a buffer layer for a CZTS-based solar cell in this study. The doping concentration and thickness of the solar cell have been optimized in this work. This work gives more than 21 % efficiency by using Ag-CdS as a dopant in the CdS buffer layer. The numerical modelling of the proposed structure reveals a unique method for improving the efficiency of the CZTS solar cell. The findings of this study are expected to utilize in the interest of the many researchers working in this field.