Critical Role of Grain Boundaries for Ion Migration in Formamidinium . . . Ion migration is enhanced at the grain boundaries Under illumination, the light-induced potential causes ion migration leading to a rearranged ion distribution Such a distribution favors photogenerated charge-carrier collection at the grain boundaries
Critical role of grain boundaries for ion migration in formamidinium . . . Abstract The critical role of grain boundaries for (CH (NH 2) 2 PbI 3) 0 85 (CH 3 NH 3 PbBr 3) 0 15 perovskite solar cells studied by Kelvin probe force microscopy under bias voltage and illumination is reported Ion migration is enhanced at the grain boundaries
Critical Role of Grain Boundaries for Ion Migration in Formamidinium . . . Ion migration is enhanced at the grain boundaries Under illumination, the light‐induced potential causes ion migration leading to a rearranged ion distribution Such a distribution favors photogenerated charge‐carrier collection at the grain boundaries
Critical Role of Grain Boundaries for Ion Migration in Formamidinium . . . Here we report the investigation of controlled PbI2 secondary phase formation in CH3NH3PbI3 (MAPI) photovoltaics through post-deposition thermal annealing, identifying the location of PbI2 in the active layer and its beneficial role on device performance
Critical role of grain boundaries for ion migration in formamidinium . . . Here, the activation energies for ionic migration in methylammonium lead iodide (CH3NH3PbI3) are derived from first principles, and are compared with kinetic data extracted from the current–voltage response of a perovskite-based solar cell