Abstract
In this study, a series of white light-emitting NaSrVO4:Dy3+ phosphors with La3+ co-doping were produced by a combustion method. The configurations of the as-prepared NaSrVO4:Dy3+ and NaSrVO4:Dy3+, La3+ specimens are consistent with the standard phase of NaSrVO4. The impacts of the Dy3+ concentration and La3+ co-doping on the luminescence characteristics of NaSrVO4: Dy3+ phosphors were explored. The specimens excited by near-ultraviolet light displayed emission peaks at 580 (yellow) and 484 nm (blue), which were ascribed to the 4F9/2 → 6H13/2 and 4F9/2 → 6H15/2 transitions of the Dy3+ ions, respectively. The white light was manufactured by these two emissions from the NaSrVO4: Dy3+ phosphor. Photoluminescence studies demonstrated that the La3+ co-doping efficiently improved the luminescence characteristics of the NaSrVO4: Dy3+ phosphor. These results suggest that the NaSr0.9425VO4: 0.05Dy3+, 0.0075La3+ phosphors excited by near-ultraviolet are promising materials for white light-emitting diodes.
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