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通过水热法合成出NaY(WO_4)_2∶Sm~(3+)上转换荧光粉。该荧光粉性质通过扫描电子显微镜、X射线粉末衍射、激发光谱以及发射光谱来表征。探讨了Sm~(3+)浓度及退火温度对NaY(WO_4)_2∶Sm~(3+)晶体结构、形貌和发光性能的影响。在Sm~(3+)浓度为1.2%,800℃退火条件下合成的样品具有最佳发光性能。利用816nm光激发NaY(WO_4)_2∶Sm~(3+),观察到了563nm处绿光,606nm处橙光以及647nm处的红光发射峰。它们分别来自于Sm~(3+)的~4 G_(5/2)→~6 H_(5/2)、~4 G_(5/2)→~6 H_(7/2)、~ G_(5/2)→~6 H_(9/2)能级跃迁。
The NaY (WO_4) _2: Sm ~ (3 +) upconversion phosphor was synthesized by hydrothermal method. The phosphor properties were characterized by scanning electron microscopy, X-ray powder diffraction, excitation spectroscopy, and emission spectroscopy. The effects of Sm ~ (3 +) concentration and annealing temperature on the structure, morphology and luminescent properties of NaY (WO_4) _2: Sm 3+ crystals were investigated. The Sm (3+) concentration of 1.2%, 800 ℃ annealed under the conditions of the sample has the best luminescence properties. NaY (WO_4) _2: Sm ~ (3+) was excited by 816 nm light, green light at 563 nm, orange light at 606 nm and red emission peak at 647 nm were observed. They are from ~ 4 G_ (5/2) → ~ 6 H_ (5/2), ~ 4 G_ (5/2) → ~ 6 H_ (7/2), ~ G_ 5/2 → → 6 H_ (9/2) energy level transition.