| abstract |
The invention discloses a water-resistant and heat-resistant perovskite nanocrystal and a preparation method and application thereof. The preparation method includes the following steps: S1. preparing a mixed solution of CsBr, PbBr 2 and organic ligands; The solvent is N,N-dimethylformamide; the molar ratio of CsBr to PbBr is ( 2 ～8): 1; S2. The mixed solution prepared in step S1. is stirred at a temperature above 60° C. to obtain Precipitation and post-treatment to obtain CsPbBr 3 /Cs 4 PbBr 6 perovskite nanocrystals. The invention successfully prepares water-resistant and heat-resistant CsPbBr 3 /Cs 4 PbBr 6 perovskite nanocrystals through a special solvent and controlling the reaction temperature, and the perovskite nanocrystals can maintain high quantum efficiency and high fluorescence intensity, It also has the advantages of water resistance and heat resistance, which is conducive to expanding the application in the field of optoelectronic display, especially for the application in the field of solid-state LED lighting. Moreover, the preparation method is simple in operation, mild in conditions, stable in product, high in repetition rate, and capable of large-scale production. |