Synthesis and photoluminescence properties of near-UV pumped yellow-emitting Li3Ba2La3(WO4)8:Dy3+ phosphors

• A series of phosphors Li3Ba2La3(WO4)8:Dy3+ with different Dy3+ concentrations were synthesized via the solid-state reaction.
• Photoluminescence properties of the Li3Ba2La3(WO4)8:Dy3+ phosphors are investigated in detail.
• The Li3Ba2La3(WO4)8:0.6Dy3+ phosphor with strong yellow emission may be applied in near ultraviolet pumped white LEDs.

Li3Ba2La3(WO4)8:Dy3+ yellow-emitting phosphors were synthesized by the solid state reaction method. These phosphors exhibit one intense emission band around 575 nm under excitation at 365 nm. The dependences of the emission intensities and the chromaticity coordinates on Dy3+ concentration were analyzed. The optimum doping concentration of Dy3+ for the phosphor is about 6 mol% and the corresponding chromaticity coordinates is (0.435, 0.476) at room temperature. Besides, the Li3Ba2La3(WO4)8:Dy3+ phosphor shows higher thermal stability than that of (Sr, Ba)2SiO4:Eu2+. The results show that the Li3Ba2La3(WO4)8:Dy3+ phosphor with strong yellow emission may be applied in near ultraviolet pumped white LEDs.