The following study focuses on breaking the Shockley-Quisser limit of perovskite solar cell (PSC) efficiency by combining organic FACsSnI₃ and inorganic Cs₂PtI₆, two metal halide, lead-free, three-dimensional absorbers, into a planar (n-i-p) structured bilayer perovskite solar cell model. The architecture is Glass/FTO/SnS2/FACsSnI3/Cs2PtI6/HTL/Au. We conducted a study on power conversion efficiency (PCE) by varying the bandgap, defect density, and electron affinity using four different hole transport layers (HTLs): CuO, CuI, Spiro-OMETAD, and Mo. The results are based on the photovoltaic properties of PSCs, specifically the power conversion efficiency (PCE), fill factor (FF), open circuit voltage (Voc), and short circuit current (Jsc) of the architecture, which were analyzed numerically using SCAPS-1D simulation software. We performed the process with an air mass of AM 1.5 G, illumination of 1000 W/m2, and temperature of 300 K. Variations of HTL have allowed this study to investigate PV characteristics of the absorbers. We’ve also used carbon (C) as the back metal contact.The Glass Substrate/SnS2/FACsSnI3/Cs2PtI6/Cu2O/C model we looked at worked best for our needs. It had an efficiency of 47.55%, a fill factor (FF) of 83.08%, a short circuit current density (Jsc) of 48.407586 mA/cm², and an open circuit voltage (Voc) of 1.1824 V. The glass substrate/SnS₂/FACsSnI₂/Spiro-OMETAD/CuI/c worked the best, with an efficiency of 38.20%, a FF of 84.77%, a Jsc of 33.009704 mA/cm², and a Voc of 1.3650 V.