Luminescent properties of Ce3+ ion and Tb3+ ion co-doped transparent oxyfluoride glass ceramics containing BaGdF5 nanocrystals

Abstract The transparent oxyfluoride glass ceramics containing BaGdF 5 nanocrystals co-doping with Ce 3 + ions and Tb 3 + ions were prepared by thermal treatment technology and the luminescent properties were described. The typical DSC curve, X-ray diffraction (XRD), transmission electron microscopy (TEM), corresponding selected area electron diffraction (SAED) patterns and high-resolution TEM (HRTEM) image were measured. The transmission spectra and luminescent properties were investigated. The decay times of the glass and glass ceramics and the energy transfer process between Ce 3 + ions and Tb 3 + ions were also studied. The XRD analysis and the TEM images confirmed the generation of the spherical BaGdF 5 nanocrystals. Compared with the PG specimen, the intensity of the emission spectra of Tb 3 + ions increases and the emission intensity of Ce 3 + ions decreases gradually with the heat treatment temperature increasing, and a blue shift in the emission spectra of Ce 3 + ions in the emission spectra of glass ceramic specimens is obviously observed. In the fluorescence decay curves of the Ce 3 + ions, it can be obviously observed that the fluorescent intensity decays in the Ce 3 + ion and Tb 3 + ion co-doped glass ceramic specimens decrease rapidly with increasing the heat treatment temperature. In addition, the efficiency of the energy transfer from Ce 3 + ions to Tb 3 + ions was also calculated.