Fig. 2

Structural and optical comparison between 3D CsPbBr₃ NCs and 0D Cs₄PbBr₆ NCs. a XRD patterns of perovskite nanocrystals, with inset schematics showing a corner-sharing octahedra network and a discrete octahedra lattice, respectively. Room-temperature absorption (Abs, solid line), photoluminescence excitation (PLE, emission monitored at 520 nm, dotted line), and photoluminescence (PL, excitation at 350 nm, green line) spectra of b colloidal CsPbBr₃ NCs and c Cs₄PbBr₆ NCs, respectively. d Blinking trace recorded for an individual CsPbBr₃ NC at the excitation level of <N> = 1. e Extracted PL lifetimes from short, sub-500 ms bursts in a blinking trace and color-coded with highlighted regions in d. f Antibunching trace