Blade-Coated Perovskites on Textured Silicon for 26%-Efficient Monolithic Perovskite/Silicon Tandem Solar Cells

As an outstanding tandem partner for silicon solar cells, solution-processed metal halide perovskites offer highly efficient photovoltaics at low cost. To date, the reported monolithic perovskite/silicon tandem cells are fabricated primarily on silicon cells with a front-side-polished surface, which is not compatible with the industrial-standard double-side-textured silicon cells. Thermal evaporation of perovskite film has been reported for perovskite/silicon tandem cells on textured silicon to bridge the gap, but it sacrifices the advantage of solution-processed perovskites. Here, we develop a new tandem architecture that enables scalable, solution-based blading of perovskites onto textured silicon wafers. This new tandem architecture combines the advances of textured silicon photovoltaics and solution-processed perovskite photovoltaics to increase the efficiency while reducing the cost of monolithic perovskite/silicon tandem cells.