Optimization and Performance Analysis of a TiO(2)/i-CH(3)NH(3)SnBr(3)/CsPbI(3)/Al(BSF) Heterojunction Perovskite Solar Cell for Enhanced Efficiency

[Image: see text] This paper reports the simulation and optimization of heterojunction perovskite solar cells (PSCs) with a proposed structure of TiO(2)/i-CH(3)NH(3)SnBr(3)/CsPbI(3)/Al(BSF) using SCAPS-1D software. The purpose of this study is to investigate the performance of the PSC with CsPbI(3) perovskite active layers and i-CH(3)NH(3)SnBr(3) as the permeable layer. Therefore, the thicknesses of the layers of the heterojunction perovskite are modified in order to find a better conversion efficiency of the solar cell, where the latter’s performance is improved by optimizing the absorber’s thickness, which is found to be 1 μm, with a permeable layer of 15 μm. The device efficiency of the i-CH(3)NH(3)SnBr(3)/CsPbI(3) heterojunction is improved to 38.98%, and optimized parameters are V(oc) = 1.21 mV, J(sc) = 35.63 mA/cm(2), and FF = 89.84%. The acceptor concentration (N(a)), donor concentration (N(d)), defect density, and series and shunt resistances are also investigated.