Fig. 1: Optical and structural characterizations of CsPbBr3 nanocrystals with varying sizes.
From: Non-monotonic size-dependent exciton radiative lifetime in CsPbBr3 nanocrystals
a steady-state absorption, and photoluminescence (PL) spectra of selected nanocrystals in weak, intermediate, and strong quantum confinement regime, with inset showing the crystal structure created with Vesta38. b Stokes shift and full width at half max as a function of bandgap energy are plotted displaying a linearly increasing trend as nanocrystal sizes decrease. c–e are transmission electron microscope (TEM) images along with their corresponding size distributions fitted with gaussian curve to extract the average nanocrystal size. TEM images scale bars are as follow: (c) 10 nm, (d) 10 nm, and (e) 50 nm with inset showing high resolution TEM of a single nanocrystal with 5 nm scale bar and its corresponding Fast Fourier Transform (FFT) with 2 nm−1 scale bar.
