Figure 3
From: Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

(a) Schematics of ligand-assisted re-precipitation (LARP) technique used to produce MAPbX3 NCs. (b) TEM and high-resolution TEM image of the resulting MAPbBr3 NCs. The inset is the corresponding FFT image. (c) PL spectra and optical images of color-tunable MAPbX3 NCs produced by LARP technique, under room light and UV lamp. Reproduced from Zhang et al.23 (d) PL spectra and photograph of size-tunable emission of strongly emitting MAPbX3 NCs, where the size was controlled by reaction temperature. Reproduced from Huang et al.29