Abstract
A series of novel Ba2GdNbO6: xSm3+ (0.01 ≦ x ≦ 0.12) phosphors were successfully synthesized by a traditional high temperature solid-state reaction. The crystal structure, micromorphology, and element distribution of the phosphors were analyzed by X-ray powder diffractometer and scanning electron microscope. The absorption spectra, excitation and emission spectra, decay curves, thermal stability and CIE chromaticity coordinates of the phosphors were studied in detail. The best doping concentration of the synthesized Ba2GdNbO6: Sm3+ phosphors is 5%, and it emits orange-red light at 605 nm (4G5/2→6H7/2) under the UV excitation of 408 nm. Meanwhile, the thermal stability of Ba2GdNbO6: 0.05Sm3+ phosphor was analyzed. The chromaticity coordinate of Ba2GdNbO6: 0.05Sm3+ phosphor is (0.496, 0.485), and shows a high color purity. The commercial phosphors and orange-red Ba2GdNbO6: 0.05Sm3+ phosphor are evenly coated on the near-ultraviolet chip to emit a bright white light. These results indicated that Ba2GdNbO6: Sm3+ phosphors present a potential application prospect in the field of solid-state white light illumination.
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