 This study investigated the use of copper-based materials as whole and electron transport layers in former Medinium tin triadide, FASNI-3, based perovskite solar cells, PSC. Cu2O, CuO2, CuSCN and CuSPS2 were used as whole transport layers due to their earth abundance, ease of manufacture, high charge mobilities and chemical stability. Fullerene derivatives, PCBM and C60 were employed as electron transport layers due to their mechanical strength, thermal conductivity and stability. The effect of these materials on optical absorption, quantum efficiency, energy band alignment, band offsets, electric field and recombination was analyzed in detail. The reasons for the low performance of the cell were identified and improved through design optimization. The best result was achieved through ITO, CuSCN, FASNI-3, C60L with an efficiency of 27.26%, FoC of 1.08V, JSC of 29.5MACM2 and FF of 85.6%. This article was authored by Mohamed Ismail, Mohamed Nomen, Shayan Tariq Jan and others. We are article.tv, links in the description below.