Fig. 5
From: Switching excitonic recombination and carrier trapping in cesium lead halide perovskites by air
Density functional theory (DFT) calculations. a Band structure of Br-defect-free CsPbBr3. b Band structure of CsPbBr3 with Br vacancy. c Band structure of CsPbBr3 with Br vacancy and adsorption of oxygen molecule. d Schematic illustration of photoluminescence (PL) switching behavior in CsPbBr3
