Magneto‐Optical Studies on Spin‐Dependent Charge Recombination and Dissociation in Perovskite Solar Cells

The observed magneto-photocurrent and magneto-photoluminescence indicate that charge recombination and dissociation are spin-dependent in organo­metal halide perovskites. A magnetic field suppresses spin mixing between the antiparallel and parallel spin states in electron–hole pairs, decreasing the antiparallel/parallel ratio. This decreases exciton formation available for light emission but increases electron–hole pairs ready for charge dissociation, decreasing photoluminescence and increasing photocurrent.