Luminescence properties of Tb3+, Eu3+, Tm3+ co-doped Na5La(MoO4)4 for white light-emitting diode

Tb3+, Eu3+, Tm3+ co-doped Na5La(MoO4)4 phosphors were prepared by the conventional solid-state reaction. Under the excitation of UV light, Na5La(MoO4)4:Tm3+, Na5La(MoO4)4:Tb3+, and Na5La(MoO4)4:Eu3+ exhibit the characteristic emissions of Tm3+ (1D2 --> 3F4, blue), Tb3+ (5D4 --> 7F5, green), and Eu3+ (5D0 --> 7F2, red), respectively. By adjusting the doping concentration of rare earth ions in Na5La(MoO4)4:a Tm3+, b Tb3+, c Eu3+, a white emission in a single composition was obtained under the excitation of 362 nm. It might be a promising phosphor for the future applications.