New theoretical analysis of a novel hetero-junction SnS/CdS solar cell with homo-junction P–P+ in the rear face-numerical approach

Abstract

The numerical investigation on a solar cell based on SnS was carried out in this paper utilizing SCAPS-1D simulation software. The originality of this work lies in the top efficiency reached after adding a BSF of the same type of absorber layer. Studied photovoltaic solar cell is wrought of a SnS layer, one layer of cadmium sulfide CdS, and ITO as a TCO layer. To achieve optimal performance, the impact of layer thicknesses, carrier concentration, series and shunt resistance, operating temperature, and the impact of the SnS P+ layer as a back surface field on solar cell performance were examined. With the insertion of the BSF in the proposed cell, the open-circuit tension improved from 820 to 930 mV, the Jsc current density slightly increased from 34.75 to 35.09 mA/cm2, the FF Fill Factor increased by even more than 87%, and a top efficiency of 28.47% was reached so rather than 23.94%.