Preparation and fluorescence properties of SiO₂-coated CsPbBrI₂ perovskite nanocrystals

Abstract All-inorganic perovskite nanocrystals CsPbX 3 (X=Cl, Br, I) have garnered significant interest due to their promising applications and become a leading research subject in the field of optoelectronics. The weak stability CsPbBrI 2 has hindered development, however, silica coating can effectively solve this problem. (3-aminopropyl) triethoxysilane was used as raw material for synthesis form core-shell structured @SiO obtain enhanced optoelectronic properties. This article reveals narrow absorption emission peaks, small half-height widths, 14.6 ns fluorescence lifetimes, 106.2 meV exciton binding energies nanocrystals. results show that prepared by method excellent spectral properties hold promise future devices.