Analysis of eco-friendly tin-halide Cs2SnI6-based perovskite solar cell with all-inorganic charge selective layers

In this research work, eco-friendly and tin-halide Cs 2 SnI 6 -based perovskite coupled with the various all-inorganic charge collective layers like ZnO, TiO 2 , CdS, GO; CuI, Cu 2 O, and MoO 3 , via one-dimensional solar cell capacitance simulator (SCAPS 1D). Among the various proposed electron and hole transport layers (ETLs and HTLs), Cs 2 SnI 6 , GO, and Cu 2 O are the most adequate materials for the efficient and stable perovskite solar cells (PSCs). In the present study, we have proposed a novel architecture FTO/GO/Cs 2 SnI 6 /Cu 2 O/Au with outstanding device performances. Also, we have analyzed and validated the impact of various factors like thickness of absorber, ETL, and HTL layer; defect density, and working temperature on the performances of the solar cells. The novel configuration possessed excellent photovoltaic outputs with a power conversion efficiency of 25.12%. The other obtained performances for the proposed novel configuration were 27.15 mA/cm 2 , 1.3 V, and 68.78% for the short-circuit current ( J sc ), open-circuit voltage ( V oc ), and fill factor (FF). The effect of series resistance is also reported in this theoretical work. The proposed material is in very good agreement with the existing experimental work and is apt for future lead-free and tin-halide-based PSCs.