Luminescence properties of Dy3+ doped glass ceramics containing Na3Gd(PO4)2

•Glass ceramics containing Na3Gd(PO4)2 crystal phase is synthesized.•The fluorescence lifetime of 0.7% Dy2O3 doped glass ceramics is 1.03ms.•The mechanism of concentration quenching is electrical multipolar interaction. Dy3+ doped precursor glass (PG) was prepared by melt-quenching, the glass ceramics (GCs) containing Na3Gd(PO4)2 phase were obtained via heating treatment. The heat treatment regime, luminescence properties of the samples were studied by differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence spectrum (PL), respectively. Finally, heat treatment system of glass ceramics is 660°C, 2 h. Emission spectra show that there are two mainly peaks at 483 nm and 577 nm, emitting blue and yellow light. The optimal doping concentration of Dy2O3 was determined to be 0.7%, and the reason for the concentration quenching is electrical multipolar interaction. According to the chromaticity coordinates (CIE), it indicated that with the change of Dy2O3concentration, the luminescence color changed from blue light to warm white light. The result shows that the Dy3+ doped GCs containing Na3Gd(PO4)2 have potential application value in white light-emitting diode (W-LED).