Fig. 2: The characterization of MAPbI3 perovskite films.
From: Methylamine-assisted growth of uniaxial-oriented perovskite thin films with millimeter-sized grains
a Optical microscopic images of the MAPbI3 perovskite films prepared from the liquid intermediate with different degassing times (1, 15, 30, and 60 s) in the internal. b Cross-sectional scanning electron microscopic (SEM) image of the large-grain MAPbI3 perovskite film. c X-ray diffraction (XRD) pattern and rocking curve (inset) of the large-grain MAPbI3 perovskite film. d Cross-sectional transmission electron microscopic (TEM) image and selected area electron diffractions (SAED) taken from the different locations (labeled 1–3) from bottom to top in the perovskite film.
