Extended Data Fig. 1: Images of perovskite films.
From: Perovskite light-emitting diodes based on spontaneously formed submicrometre-scale structures
a, Photograph of a perovskite film on a 2 cm × 2 cm glass/ZnO-PEIE substrate, alongside a coin. The perovskite film is shiny and uniform. b, Optical microscope images with different magnifications. The scale bars represent 30 μm. c, SEM images with different magnifications. The scale bars represent 3 μm. d, High-magnification SEM images of randomly selected regions. The scale bars represent 3 μm. e, AFM images with different magnifications. The scale bars represent 2 μm. The images show the submicrometre-scale structure of the perovskite film.
