Figure 2
From: Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

(a) High-resolution TEM image of a single, highly crystalline MAPbBr3 NC (scale bar: 2 nm), shown along with a schematic representation of the perovskite unit cell. (b) UV-visible absorption (left) and PL spectra (right) of MAPbBr3 NCs in toluene. Insets show photographs of the respective solution under ambient light and 365 nm UV lamp. Reproduced from Schmidt et al.30 (c) Image of the toluene dispersion of MAPbBr3 NCs under UV-laser pointer excitation. (d) TEM images of perovskite NCs. Adapted from Gonzalez-Carrero et al.28