Abstract
A simply encapsulated, long-range excitation method for white light generation was proposed. Na1.5Y2.5F9: Ce3+, Tb3+, Eu3+ (NYFCTE) glass-ceramics (GCs) were synthesized by the melt-quenching method. The effect of crystallization temperature on the formation of crystallites was analyzed by X-ray diffraction (XRD). The morphology and size of nanocrystals were investigated by transmission electron microscope (TEM). The unit cell diagram of Na1.5Y2.5F9 nanocrystals was drawn. In addition, the luminescence properties of Ce3+, Tb3+, Eu3+ ions-doped Na1.5Y2.5F9 GCs were tested and analyzed. The sample NYFCTE2 emits bright white light when excited by a 320 nm light source at a distance from the light source. The NYFCTE2 sample obtained white light with Commission Internationale de L'Eclairage (CIE) coordinate of (0.3110, 0.3472), Correlated Color Temperature (CCT) of 6467.72 K, and reliable thermal stability. The above results indicate that the proposed white light generation method and NYFCTE GCs have immense application prospects for illumination.
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