Cs₂AgBiBr₆-based perovskite solar cell: A novel combination of ITO/CdS/ Cs₂AgBiBr₆/ CuAlO₂/Pt, with inorganic charge transport layers

Cs₂AgBiBr₆ is a lead-free double halide perovskite, which has attracted attention as a potential replacement to toxic and unstable organic-inorganic perovskites due to its high structural stability, non-toxicity, and unique photoelectric properties. This work presents a Numerical analysis of a lead-free Cs₂AgBiBr₆-based perovskite solar via SCAPS software. The effect of several input parameters has been analyzed; after selecting the best Holes Transport Layer (HTL) and the best Electrons Transport Layer (ETL), we have optimized their thicknesses as well as their doping densities, we have also analyzed the impact of: the absorber thickness, its defect density (N_t), defect density at ETL/Cs₂AgBiBr₆ and Cs₂AgBiBr₆/HTL interfaces, ETL electron affinity, and front/back contact work function on device performance. Finally we obtained a solar device based on Cs₂AgBiBr₆with a fully inorganic structure. The results show that Cs₂AgBiBr₆ can play an important role as an absorbing perovskite in the development of solar cell technology.