This paper presents an optoelectrical model for perovskite/perovskite/silicon (PPS) triple-junction solar cells, aiming to explore their practical efficiency potential. The model is developed in Sentaurus TCAD and validated with experimental data from a state-of-the-art PPS cell. The optical properties of the PPS structure are analyzed, and the results are used to determine an efficiency roadmap for optimizing the cell's performance. The model includes adjustments to perovskite layer thicknesses, bandgaps, and the introduction of a textured front side to enhance light absorption and reduce reflection losses. The electrical simulation model is also developed, incorporating ion migration and recombination processes. The results show that by optimizing the perovskite layers and using a fully textured structure, a short-circuit current of 14.1 mA cm⁻² and an open-circuit voltage of 3.48 V can be achieved, leading to an efficiency of 44.3%. The study highlights the potential of PPS cells for high-efficiency, low-cost solar energy conversion, with the practical efficiency potential reaching up to 44.3%. The results demonstrate that PPS cells can achieve higher efficiencies than conventional silicon single-junction cells due to lower thermalization losses. The study also emphasizes the importance of optimizing perovskite bandgaps and layer thicknesses to achieve current matching and maximize the overall efficiency of the triple-junction structure. The findings provide a roadmap for further research and development of PPS solar cells towards practical implementation.This paper presents an optoelectrical model for perovskite/perovskite/silicon (PPS) triple-junction solar cells, aiming to explore their practical efficiency potential. The model is developed in Sentaurus TCAD and validated with experimental data from a state-of-the-art PPS cell. The optical properties of the PPS structure are analyzed, and the results are used to determine an efficiency roadmap for optimizing the cell's performance. The model includes adjustments to perovskite layer thicknesses, bandgaps, and the introduction of a textured front side to enhance light absorption and reduce reflection losses. The electrical simulation model is also developed, incorporating ion migration and recombination processes. The results show that by optimizing the perovskite layers and using a fully textured structure, a short-circuit current of 14.1 mA cm⁻² and an open-circuit voltage of 3.48 V can be achieved, leading to an efficiency of 44.3%. The study highlights the potential of PPS cells for high-efficiency, low-cost solar energy conversion, with the practical efficiency potential reaching up to 44.3%. The results demonstrate that PPS cells can achieve higher efficiencies than conventional silicon single-junction cells due to lower thermalization losses. The study also emphasizes the importance of optimizing perovskite bandgaps and layer thicknesses to achieve current matching and maximize the overall efficiency of the triple-junction structure. The findings provide a roadmap for further research and development of PPS solar cells towards practical implementation.