Perovskite solar cells (PSCs) have appeared as an encouraging photovoltaic technology due to their high efficacy and low fabrication cost. However, their stability and scalability are hampered by charge recombination and intricate multilayer architectures. Using HTL-free design, this work explores reduced PSCs designs with the goal of reducing recombination losses and enhancing the overall device performance. Optimized ETL-only and HTL-free topologies may substantially decline the interfacial recombination and progress in charge extraction, according to numerical simulations conducted with SCAPS-1D. The FTO/α-Fe2O3/CH3NH3PbI3/Au device achieves a high power conversion efficiency (PCE) of 2... More >