Performance enhancement of Sb₂Se₃ solar cells via bilayer architecture: a SCAPS-1D simulation study

Abstract

The present paper is about a new Sb₂Se₃/CMTS bilayer structure solar cell, which has been modeled to achieve high efficiency at least fabrication costs. Copper Manganese Tin Sulfide (CMTS) and Sb₂Se₃ serve as absorber layers in this suggested bilayer configuration. A research study concerning the effect of different variables like the impact of thickness of absorber layer and doping concentration on the performance of the device which is being carried out using SCAPS-1D software. With a thickness of 1000 nm for Sb₂Se₃ and 3000 nm for CMTS absorber layers, a maximum efficiency of 12.86% was observed. Furthermore, an efficient technique has been proposed to enhance the efficiency, with the addition of one additional absorber layer in combination with the Sb₂Se₃ layer. This layer helps to improve the optical absorption coefficient and lessen the recombination losses, and subsequently results in the reduction of Voc deficit. It has been found that the design proposed for theSb₂Se₃/CMTS bilayer structure shows an efficiency of 12.86%. This makes it a possible substitute for obtaining stable and highly efficient bilayer solar cells.