Abstract
Rare-earth (RE)-activated barium molybdate phosphors for multicolor display applications were synthesized with different activator ions via a solid-state reaction. The effects of the activator ions on the structural, morphological, and optical properties of barium molybdate phosphors were investigated. The XRD spectra of all the phosphors, regardless of the activator ion, exhibited that the main peak of the phosphors occurred at the (112) plane, indicating the tetragonal BaMoO4 structure. The crystalline particles exhibited a tendency to agglomerate with irregular shapes and sizes. The emission spectra of RE-ion-doped BaMoO4 phosphors under ultraviolet excitation consisted of multicolor emissions: blue for Tm3+ activator ions, green for Tb3+ activator ions, yellow for Dy3+ activator ions, reddish orange for Eu3+ activator ions, and red for Sm3+ activator ions. These results suggest that multicolor emission can be realized by incorporating appropriate activator ions into the BaMoO4 host lattice.
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