Luminescence Properties Of Gd2moo6:Eu3+ Nanophosphors For Wleds

A series of Gd2-xMoO6:xEu(3+) (x = 0.18-0.38) nanophosphors were synthesized by the solvothermal method. The properties of these nanophosphors were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), fluorescence spectroscopy and diffuse reflectance spectroscopy. Gd2-xMoO6:xEu(3+) nanophosphors have a strong excitation band in the NUV region and emit red light with high color purity by efficient energy transfer from the MoO66- group to Eu3+ ions. Red LEDs and WLEDs were fabricated using a 370 nm chip and Gd2-xMoO6:0.26Eu(3+) nanophosphors, which showed good electroluminescence performance. At a driving current of 20 mA, WLEDs displayed CIE coordinates of (0.3297, 0.3869), a correlated color temperature (CCT) of 5604 K and a high color rendering index (R-a) of 91.6. This work demonstrates that Gd2-xMoO6:xEu(3+) phosphors are promising red phosphors excited by a NUV chip for WLEDs.