Extended Data Fig. 5: HAADF-STEM analysis of in situ core/shell perovskites.
From: Ultra-bright, efficient and stable perovskite light-emitting diodes
a, TEM image and b, c, magnified HAADF-STEM images of in situ core/shell perovskite thin films. d, HAADF-STEM image of in situ core/shell grains and EDS elemental maps of P (red), Pb (yellow), and Br (green), respectively. The EDS maps clearly show the uniform dispersion of P (red) over macrograins. e, HAADF-STEM image of single macrograins consists of in situ core/shell nanoparticles. f, EDS spectrum acquired at the location of the red circled region in e.
