Hot-charge relaxation in lead halide perovskite: uncovering the bandgap dynamics, hot-biexciton effect and photo-bleaching shift

Abstract

The hot-charge relaxation mechanisms remain contentious in lead halide perovskites, though regarded as frontrunners for future photovoltaics. A model uncovering the spectral and temporal band-edge evolution provides novel insights into many-body interplay and photo-bleaching shift.