Influence of silver nanoparticles in the ion-exchange layer of photo-thermo-refractive porous glass on the spectral-luminescent properties of CsPbBr3 perovskite nanocrystals

The spectral-luminescent properties of new composite materials based on porous matrices of photo-thermo-refractive glasses with a silver ion-exchange layer and CsPbBr3 inorganic perovskite nanocrystals have been studied. Perovskite nanocrystals were introduced into a porous matrix by the method of pumping solutions through a sample under piston pressure. Two mechanisms of interaction between silver nanoparticles and perovskite nanocrystals have been revealed, such as enhancement of the local field and luminescence quenching due to the high absorption of nanoparticles. The quantum yield of the studied samples under different irradiation associated with an increase in the concentration of silver nanoparticles was 34% without irradiation, 51% with 100 j irradiation dose, and 25% with 1000 j irradiation dose. In this case, an increase in the integrated luminescence intensity was observed in glasses irradiated with 100 J by a factor of 2.97 and irradiated with 1000 J by a factor of 1.76 compared to the unirradiated sample. The average luminescence lifetime decreases from 2.19 to 1.68 ns with an increase in the concentration of nanoparticles.