Imaging the Long Transport Lengths of Photo-generated Carriers in Oriented Perovskite Films

Organometal halide perovskite has emerged as a promising material for solar cells and optoelectronics. Although the long diffusion length of photo-generated carriers is believed to be a critical factor responsible for the material's high efficiency in solar cells, a direct study of carrier transport over long distances in organometal halide perovskites is still lacking. We fabricated highly oriented crystalline CH_3H_3bI_3(MAPbI_3...