Figure 2

(a) An optical microscope image of the flash evaporated MAPbI3 film. (b) SEM image and (c) AFM images of flash evaporated MAPbI3 film surface.
(a) An optical microscope image of the flash evaporated MAPbI3 film. (b) SEM image and (c) AFM images of flash evaporated MAPbI3 film surface.