Multifunctional Borate Additive Enables Defect Passivation and Crystallization Control Toward High‐Performance n‐i‐p Perovskite Solar Cells
Metal halide perovskite solar cells (PSCs) represent one of the most promising next‐generation photovoltaic technologies, owing to their exceptional optical absorption coefficient, tunable bandgap, long carrier diffusion length and low‐cost solution processability. However, the performance of PSCs remains constrain...