Fig. 3: Properties of perovskite Films.
From: Ammonia for post-healing of formamidinium-based Perovskite films

a Schematic illustration of NH3 post-healing FACsPbI3 perovskite thin film. b, c Scanning electron microscope (SEM) images of (b) raw FACsPbI3 and (c)NH3-FACsPbI3 perovskite films. d, e X-ray diffraction (XRD) patterns, f Ultraviolet-visible (UV-Vis) spectra and steady photoluminescence (PL) spectra of raw FACsPbI3 and NH3-FACsPbI3 perovskite films, respectively.