Investigação das propriedades ópticas de íons de Mn2+ com nanocristais de CsPbI3

Abstract

The present work aimed to synthesize and characterize the optical, structural and electronic properties of Mn2+ ions and Perovskite - CsPbI3 nanocrystals in a glass matrix. To analyze the optical properties of nanocrystals, UV-Vis-NIR Optical Absorption Spectroscopy and Photoluminescence Spectroscopy experiments were carried out. Structural characterizations were carried out using X-ray Diffraction and Transmission Electron Microscopy. As results, experimental evidence was observed for energy transfer from CsPbI3 nanocrystals, synthesized by the fusion method, to Mn2+ ions embedded in glassy systems (SBNAPC: SiO2-B2O3–NaI–Al2O3–PbI2–Cs2CO3). The transfer of radiative and non-radiative energy between the Perovskite nanocrystals and the levels of Mn2+ ions were observed in the photoluminescence spectra. It is believed that these results can inspire further investigation of similar systems to enable possible laser devices or applications. Furthermore, a glass matrix analysis strategy protects the nanocrystals from chemical attack in a hostile environment, ensuring long-term stability, as they are easily oxidized or inactivated in the presence of oxygen, humidity or light irradiation.