Red luminescence properties of Na 5 Y(WO 4 ) 4 doped with Eu 3+ and alkali metal ions

Na 5 Y(WO 4 ) 4 : 6 % Eu 3+ , 6 % R + (R = Li, Na, K) phosphors were synthesized using a high-temperature solid-state reaction method. Through a series of characterization methods, the crystal structure, morphology, composition, and luminescence properties of the sample are obtained. At the same time, the properties of Na 5 Y(WO 4 ) 4 : Eu 3+ phosphor added with alkali metal ions such as Li + , Na + , K + were also studied. The experiment showed the red light emission and fluorescence lifetime of Na 5 Y(WO 4 ) 4 : 6 % Eu 3+ are improved through the doping of low concentration alkali metal agents, and Na 5 Y(WO 4 ) 4 : 6 % Eu 3+ , 6 % Li + obtained the strongest red light emission intensity. The results indicate that the red emissions intensity of Na 5 Y(WO 4 ) 4 : Eu 3+ can be enhanced through the Li + alkali metal agents, which may lead to less use of Y 3+ and hence lower cost.