Abstract: Rare earth Eu³⁺-doped BaNb₂O₆ phosphor wasprepared by solid-state reaction.Structure and photoluminescence properties ofthe phosphors were characterized by X-ray diffraction (XRD),SEM and fluorescence spectrophotometer.XRD results showed that the pure phase of BaNb₂O₆ couldbe available after being fired at 1 200 °C.The particles have a slight agglomerate phenomenon and flake-like shape with the diameter of about 1～3 μm.Ba_1-xNb₂O₆:Eu³⁺_x phosphors could be effectively excited by the near UV irridiation (401 nm) and emit orange light at 593 nm due to the magnetic dipole ⁵D₀→⁷F₁ transitions on Eu³⁺,which indicated that Eu³⁺occupied the symmetry sites in the BaNb₂O₆ host lattice.The effect of the co-activator Bi³⁺ on the PL of the BaNb₂O₆:Eu³⁺ phosphor was studied.The addition of the co-activator Bi³⁺ increased the PL intensity ofthe BaNb₂O₆:Eu³⁺ phosphor at about 593 nm and reached the maximum whenthe mole fraction of Bi³⁺ was 5%.

Key words: luminescence, phosphor, solid-state reaction