Formamidinium tin triiodide (FASnI₃)is a suitable candidate for the absorber layer in perovskite solar cells (PSC) because of its non-toxicity, narrow band gap, thermal stability,y and high carrier mobility. This study focuses on the analysis and improvement in the performance of FASnI₃-based PSCs using various inorganic charge transport materials; copper-based materials such as Cu₂O, CuAlO₂, CuSCN and CuSbS₂ are introduced as hole transport layers due to their earth abundancy, ease in manufacturing, high charge mobilities and chemical stability. Similarly, fullerene derivates (PCBM and C₆₀) are deployed as electron transport layers due to their mechanical strength, thermal conductivity and stability. The effect of these materials on the optical absorption, quantum efficiency, energy band alignment, band offsets, electric field and recombination are studied in detail. The reasons for low performance of the cell are identified and improved through design optimization. The PSC performance is analyzed in both inverted and non-inverted architecture. Among all the structures, the best result is achieved through ITO/CuSCN/FASnI₃/C₆₀/Al with an efficiency of 27.26%, Voc of 1.08 V, Jsc of 29.5 mA/cm², and FF of 85.6%.

SCAPS_1D software was used to model different perovskite structures. The effect of different parameters was varied to study the effect. The data sets were generated through the software which were then saved in Excel.

SCAPS-1D was used to generate data.