Lead-free double perovskites have been regarded as viable, ecologically friendly photovoltaic materials to replace the hybrid lead halide perovskites, due to their great stability and nontoxicity. In this study, a lead-free double perovskite (Cs₃Fe₂Cl₉) thin film as an absorb layer was prepared by a simple chemical process. Then, the lead-free double perovskite solar cell (LFDPVSSC) was fabricated on porous silicon using Cs₃Fe₂Cl₉ film as an absorbent layer. Structural, morphological, and optical properties were investigated via different methods, including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and ultraviolet-visible (UV-Vis) spectroscopy. The XRD analysis result proved that the prepared film has a polycrystalline structure with a tetragonal system and a crystallite size around (51 nm). A spherical-like crystal structure as well as other irregular structures were revealed by the FESEM image of the prepared film surface. The absorption spectrum of the double perovskite film was registered via the UV-Vis spectrophotometer. The energy band gap of the Cs₃Fe₂Cl₉ film computed via Tauc’s equation was ~2.73 eV). A conversion efficiency of 0.6% for the LFDPVSSC was achieved.