The green light emission of CsPbBr3 quantum-dots microcrystals with different concentrations of F- doping

CsPbBr3 quantum-dots were successfully prepared in fluorine doped borosilicate microcrystals with different concentrations. The crystal structure of the perovskite quantum-dots was determined by XRD. The morphology of perovskite quantum-dots was characterized by TEM. The fluorescence characteristics were analyzed by fluorescence spectrum and CIE chromaticity coordinate. The XRD patterns show that the perovskite quantum-dots microcrystals were successfully doped in the borosilicate microcrystals. The TEM results show that CsPbBr3 quantum-dots are uniformly distributed in borosilicate microcrystals. Under the excitation of 360 nm ultraviolet light, the CsPbBr3 quantum-dots exhibit strong green emission at 519 nm. The lifetime decay of quantum-dot crystallites increased from 4.04 ns to 14.42 ns, and the PLQY reached 44.81%. Therefore, the obtained quantum-dots can be used in the powder solid-state light-emitting devices with high light efficiency and long-life span.