使用溶胶-凝胶法在不同煅烧温度下制备了不同掺杂的YAG∶Ce, Yb荧光粉。使用扫描电镜、X射线衍射仪对其形貌、结构进行了表征; 采用光致发光、荧光寿命等技术, 对其发光性质进行了研究。结果表明: 粉体粒径随煅烧温度上升而增大, 在1 000 ℃下, 得到平均尺寸~84 nm的纳米荧光粉。溶胶-凝胶法产物与高温固态法产物相比, Yb3+离子发光的猝灭浓度由10%下降至5%。这可能是由于溶胶-凝胶反应产物体系中掺杂离子分布更加均匀所致。

YAG∶Ce,Yb nano-phosphor with different doping concentrations was synthesized under various sinter temperature via sol-gel method. The morphology and structure of the resulting products were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The luminescence properties of the phosphors were studied by photoluminescence spectra and lifetimes. The samples show a rise in particle size with increased calcination temperature. Under 1 000 ℃, pure YAG phase with an average particle size of ~84 nm are obtained. The quenching concentration of Yb3+ in the aforementioned phosphors exhibits a decrease from 10% to 5%, probably due to more homogeneous distribution of doping ions in the system of sol-gel products.