Sb2Se3/CZTS dual absorber layer based solar cell with 36.32 % efficiency: A numerical simulation

Abstract

Thin-film solar cells are cheap, and their production is also straightforward, but there is a need to increase the efficiency of these solar cells. In this work, two absorber layers, antimony selenide (Sb2Se3) and copper zinc tin sulfide (CZTS), are used to enhance solar cell performance, and the performance is analyzed using SCAPS-1D software. The presence of an additional absorber layer (CZTS) affects the performance of various parameters such as shallow acceptor density, radiative recombination coefficient, and total defect density. A detailed study of the junction characteristics such as I–V and C–V, energy band gap, generation, and recombination rate are also analyzed. By increasing the thickness of the CZTS layer, efficiency was also increased. Maximum efficiency of 36.32% was achieved when the Sb2Se3 and CZTS absorber layer thicknesses were 0.4 μm and 1.6 μm, respectively (under AM 1.5 G illumination).

Keywords

• Sb2Se3
• CZTS
• CdS
• Dual absorber layer
• SCAPS