白光LED用新型低温玻璃荧光体SiO_2-YAG:Ce^(3+)的制备及性能研究

Characterization of New SiO_2-YAG: Ce^(3+) Phosphor Prepared by Sol-Gel Method for WLED Application

采用溶胶凝胶法制备并研究了白光LED用新型低温玻璃荧光体SiO2-YAG:Ce3+的发光性能。X-射线衍射(XRD)图谱分析表明所得荧光体主相为Y3Al5O12;扫描电镜照片(SEM)显示其粒径在10μm左右;双指数拟合后的荧光寿命是10.29和58.89 ns;该玻璃荧光体与蓝光芯片组合成的白光LED器件具有良好的色坐标(0.303,0.319),研究表明SiO2-YAG:Ce3+是一种潜在的无环氧树脂的新型白光LED用荧光体。

A new phosphor SiO2-YAG： Ce^3＋ was prepared by sol-gel method. The X-ray diffraction （XRD） patterns disclosed that the phosphor was a pure Y3Al5O12 phase. The scanning electron microscopy （SEM） images showed that the samples had an average size about 10 μm. The decay time was short as 10. 29 ns and 58.89 ns. A white light-emitting diode was fabricated by combining SiO2-YAG： Ce^3＋ phosphor with a 462 nm-emitting InGaN chip. Its CIE chromaticity coordinates are （0. 303, 0. 319）. All the characterization indicated that SiO2-YAG： Ce^3＋ prepared by sol-gel method is promising as a potential phosphor without epoxy resin in WLED application.