Luminescence properties of CsPbBr3 nanocrystals dispersed in a polymer matrix

Investigation of the spectral and luminescence characteristics of CsPbBr3 nanocrystals coated with poly (NVP-co-VEP-co-GMA) oligoperoxide molecules dispersed in a polymer matrix under excitation in the energy region of quanta E = 2 ÷ 6 eV was carried out. Formation of CsPbBr3 nanocrystals dispersed in the polymer matrix has been confirmed by electron microscopy, X-ray diffraction and optical spectroscopy. Spectral structure and kinetic parameters of the luminescence of polymer-inorganic composites with dispersed CsPbBr3 nanocrystals are discussed considering possible influence of size effects on the relaxation processes of intrinsic electron excitations. The revealed temperature dependence of the luminescence intensity and of the spectral luminescent maximum position of bound exitons of these nanocrystals in the temperature range of 77÷295 K promotes their use for temperature measurements of biological objects.