Optimum band gap for hybrid silicon/perovskite tandem solar cell

Tandem solar cells based on silicon and perovskites have raised high hopes for future high efficiency solar modules. A tandem solar cell works by absorbing the high energy photons (visible light) in a top cell which generates a high voltage, and the lower energy photons (Infra red) in a rear cell, which generates a lower voltage. This increases the theoretical maximum efficiency by about 50% in comparison to a standalone silicon cell.