Red luminescence properties of Na5Y(WO4)4 doped with Eu3+ and alkali metal ions

Na5Y(WO4)4: 6 % Eu3+, 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 Na5Y(WO4)4: Eu3+ 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 Na5Y(WO4)4: 6 % Eu3+ are improved through the doping of low concentration alkali metal agents, and Na5Y(WO4)4: 6 % Eu3+, 6 % Li+ obtained the strongest red light emission intensity. The results indicate that the red emissions intensity of Na5Y(WO4)4: Eu3+ can be enhanced through the Li+ alkali metal agents, which may lead to less use of Y3+ and hence lower cost.