Numerical design and optimization of Sb2S3/SnS2 heterojunction solar cells: Performance analysis and insights

Abstract

This work introduces the numerical modeling of novel Sb₂S₃/SnS₂ based heterojunction solar cells using the SCAPS-1D. The designed solar cell configuration characterized by FTO/SnS₂/Sb₂S₃/Metal was thoroughly examined, considering parameters such as thickness, energy bandgap, acceptor and donor densities, defect density at interface, and the corresponding metal work function respectively. Our design illustrates that appropriate optimization can substantially boost the device’s performance, achieving an impressive PCE of 23.32 %, accompanied by a V_oc of 1.325 V, J_sc of 19.72 mA/cm², and an FF of 89.22 %. This enhanced device performance was assessed and linked to enhanced light absorption and reduced recombination losses because of the optimized setup. Additionally, this research underscores the viability of SnS₂ as an effective buffer layer to achieve high efficiency in thin film solar cells. These findings reveal that inorganic Sb₂S₃/SnS₂ heterojunction solar cells are promising contenders for applications in photovoltaic technology.