Single-Composition White Light Emission from Dy(3+) Doped Sr(2)CaWO(6)

A series of Dy(3+) ion doped Sr(2)CaWO(6) phosphors with double perovskite structure were synthesized by traditional high temperature solid-state method. It was found that there is significant energy transfer between Dy(3+) and the host lattice, and the intensities of emission peaks at 449 nm (blue), 499 nm (cyan), 599 nm (orange), 670 nm (red), and 766 nm (infra-red) can be changed by adjusting the concentration of dopant amount of Dy(3+) ion in Sr(2)CaWO(6). The correlated color temperature of Dy(3+) ion doped Sr(2)CaWO(6) phosphors can be tuned by adjusting the concentration of Dy(3+) ion. Upon optimal doping at 1.00 mol% Dy(3+), white light with chromaticity coordinate (0.34, 0.33) was emitted under excitation at 310 nm. Thus, single composition white emission is realized in Dy(3+) doped Sr(2)CaWO(6).