Preparation and luminescence properties of Dy3+ doped BaO-Al2O3-SiO2 glass ceramics

Dy(3+ )doped transparent glass ceramics containing Ba-0.808(Al1.71Si2.29)O-8 crystal phase are successfully prepared by the melting crystallization method. Through differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscope (SEM), the optimum heat treatment condition is determined to be 680 degrees C/1.5 h. The absorption spectra of the glass and glass-ceramic samples are used to calculate their indirect allowable optical band gaps. It is found that the optical band gap of glass ceramics narrowed. The emission spectrum shows three emission peaks at 484 nm, 576 nm, and 669 nm, corresponding to the blue, yellow, and red emission of Dy3+. The optimal doping concentration of Dy2O3 is 0.45 mol%, the Correlated Color Temperature (CCT) of 4540 K, and the CIE chromaticity coordinates of (0.3642, 0.3924), which is close to warm white light. The reason for the concentration quenching is the electrical multipolar interaction between Dy3+.