Challenges of Scalable Development for Perovskite/Silicon Tandem Solar Cells

Cost reduction and efficiency increase are the overarching goals of photovoltaic (PV) research. As the proportion of the PV module cost to the entire system cost is getting lower and lower, continuing to increase the efficiency has almost become the only option. As the most well-established PV technology now, crystalline silicon solar cells have roughly experienced three generations of development, and the efficiency is gradually approaching the theoretical limit. Perovskite/silicon tandem solar cells, which have broken through the theoretical limit of silicon in the laboratory, are widely regarded as the next-generation technology. On the basis of existing silicon and perovskite research, we summarize that the technical problems might be encountered in the mass production of perovskite/silicon tandem solar cells in the future and predict future research directions.