Yellow Emission Obtained by Combination of Broadband Emission and Multi-Peak Emission in Garnet Structure Na(2)YMg(2)V(3)O(12): Dy(3+) Phosphor

The fabrication and luminescent performance of novel phosphors Na(2)YMg(2)V(3)O(12):Dy(3+) were investigated by a conventional solid-state reaction method. Under near-UV light, the Na(2)YMg(2)V(3)O(12) host self-activated and released a broad emission band (400–700 nm, with a peak at 524 nm) ascribable to charge transfer in the (VO(4))(3−) groups. Meanwhile, the Na(2)YMg(2)V(3)O(12):Dy(3+) phosphors emitted bright yellow light within both the broad emission band of the (VO(4))(3-) groups and the sharp peaks of the Dy(3+) ions at 490, 582, and 663 nm at a quenching concentration of 0.03 mol. The emission of the as-prepared Na(2)YMg(2)V(3)O(12):Dy(3+) phosphors remained stable at high temperatures. The obtained phosphors, commercial Y(2)O(3):Eu(3+) red phosphors, and BaMgAl(10)O(17):Eu(2+) blue phosphors were packed into a white light-emitting diode (WLED) device with a near-UV chip. The designed WLED emitted bright white light with good chromaticity coordinates (0.331, 0.361), satisfactory color rendering index (80.2), and proper correlation to a color temperature (7364 K). These results indicate the potential utility of Na(2)YMg(2)V(3)O(12):Dy(3+) phosphor as a yellow-emitting phosphor in solid-state illumination.