Synthesis and luminescence properties of white-light-emitting phosphor Sr3GdNa(PO4)3F:Dy3+

Novel Sr3Gd(1-x)DyxNa(PO4)(3)F (SGNP:xDy(3+), x=0.01, 0.03, 0.05, 0.07, 0.09, 0.11) phosphors were synthesized by a conventional solid-state reaction method at different compositions. The X-ray diffraction results confirmed that the as-prepared samples were pure phase. The phosphor had two intense emission bands centering at 481 and 574 nm which could be attributed to the F-4(9/2)-> H-6(15/2) transition and the F-4(9/2)-> H-6(13/2) transition, respectively. The chromaticity coordinates (x, y) of this phosphor were calculated to be (0.3054, 0.3354) located on the region of white light region when excited at 350 nm. The concentration quenching mechanism of Dy3+ was ascribed to the dipole-dipole interaction. The current research suggested that the phosphors might be potential application in the w-LEDs.