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The perovskite-based photovoltaic cells are the best way to convert photon radiation into electrical energy. The fundamental focus of this work is to stimulate and boost the power conversion efficiency (PCE) of an alloy-based CsPb0.75Sn0.25IBr2 perovskite solar cell. The simulation was run on SCAPS-1D cell simulator software (ver. 3.3.09). In this current work, a perovskite CsPb0.75Sn0.25IBr2 with the suitable composition of ions coupled with Tin-based electron transport layers (ETLs)-SnO2 and Mg:SnO2. The thickness and defect density of absorber layer-CsPb0.75Sn0.25IBr2 has been optimized. The impact of the thickness variation of ETL-SnO2 and Mg:SnO2 on device performances was also studied. The effect of working temperature, rate of charge carrier generation, and recombination on photovoltaic outputs like open-circuit voltage (Voc), short-circuit current (Jsc), fill factor (FF), and PCE has been studied and analyzed. The simulated cell achieved an efficiency of 13.82% under optimum conditions. The optimized efficiency was comparatively higher than the experimental efficiency of 11.85%. This study demonstrates the role of optimization of various properties of different layers of solar cells.

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