Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality

The power conversion efficiency of the market-dominating silicon photovoltaics approaches its theoretical limit. Bifacial solar operation with harvesting additional light impinging on module back and perovskite/silicon tandem device architecture are among most promising for further increasing energy yield from a limited area. Herein, output cells in monofacial bifacial is calculated, first time considering luminescent coupling (LC) between two sub-cells. For calculations, idealized studied at both standard testing as well realistic weather conditions combination detailed illumination model periodic panel arrays. Typical experimental photoluminescent quantum values reveal that more than 50% excess electron–hole pairs perovskite top cell can be utilized by bottom means LC. As result, LC strongly relaxes constraints top-cell bandgap monolithic devices. In operation, optimum shifts 1.71 eV to range 1.60–1.65 eV, where already high-quality materials exist. results very important developing optimal cells.