Resonant Silicon Nanoparticles for Enhanced Light Harvesting in Halide Perovskite Solar Cells

Improving performance and stability of lead halide perovskites solar cells (PSC) is one of the most important direction in modern photovoltaics. For this purpose, we added low-loss and chemically inert resonant silicon nanoparticles (NPs) between electron transport layer and perovskite layer that allows to increase the efficiency enhancement via improved light harvesting, photocurrent, open-circuit voltage and fill-factor. This results in a boost of the device efficiency up to 18.8%, being a record among the previously reported results on nanoparticles incorporation into CH3NH3PbI3 (MAPbI3) perovskite-based solar cells. Moreover, PSC with the silicon NPs shows efficiency improvement in time with respect to the cells without NPs. The proposed method is simple and can be implemented for PSCs with various compositions and architectures.