YAG:Ce,Mn微晶玻璃的制备及光谱性能研究  

Preparation and Luminescence Properties of Cerium,Manganese Co-doping YAG Glass Ceramics

作　　者：黄海宇[1] 向卫东[1,2] 张志敏[1] 钟家松[2] 金怀东[1] 董永军[3] 梁晓娟[1] 

机构地区：[1]温州大学化学与材料工程学院,浙江温州325035 [2]同济大学材料科学与工程学院,上海200092 [3]中国科学院上海光学精密机械研究所,上海201800

出　　处：《中国稀土学报》2012年第6期726-731,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(51172165;60708021);浙江省自然科学基金重点基金(Z4110347);浙江省重点科技创新团队资金(2009R50010);温州市科技局计划项目(G20090082)资助

摘　　要：由于YAG:Ce微晶玻璃缺乏红色发光成分,导致其封装的白光LED显色指数低。以Y2O3-Al2O3-SiO2-Li2O作为Ce,Mn掺杂的基质,制备了可提高显色指数的白光LED用YAG:Ce,Mn微晶玻璃。通过XRD测试、荧光测试和电光源测试表征了玻璃的晶相结构、光谱性能及荧光寿命,研究了Mn2+对YAG:Ce微晶玻璃发光的影响,并对其增红机制进行了探讨。结果表明:基玻璃在1400℃热处理可析出纯YAG晶相;YAG:Ce,Mn微晶玻璃在460 nm光激发下,在530 nm处有Ce3+的特征发射峰,由于Ce3+-Mn2+之间的能量传递,在585 nm处有Mn2+的特征发射峰,从而使得YAG:Ce,Mn微晶玻璃的发光峰比YAG:Ce微晶玻璃的发光峰向红光方向宽化,有效地提高了白光LED的显色性能。The color rendering index of YAG： Ce glass-ceramics is low due to the lack of red emission. By using Y2O3-AL2o3-SiO2-Li2O as Ce, Mn co-dope glass matrix, the YAG ： Ce, Mn glass ceramic, which could improve the color rendering index for white- LED, was prepared. The crystalline phase structure, luminescence properties and lifetime were examined by X-ray diffraction （XRD） and photoluminescence spec- troscopy, respectively. The effect of Mn on properties of the YAG：Ce glass-ceramics was studied. The principle of enhancement of red emission was also investi- gated. The XRD results showed that only YAG crystal were precipitated in the mother glass after heat treat- ment. With the excitation at 460 nm, YAG：Ce, Mn glass ceramic had a characteristic emission peak of Ce3＋ located at 530 nm. There also have a red emis- sion peak of Mn2＋ located at 585 nm in YAG：Ce, Mn glass ceramic due to the energy transfer among Ce3 ＋ - Mn2＋ ions, which could improve the color rendering index of LEDs.

关 键 词：白光LED YAG Ce Mn微晶玻璃 显色指数 稀土 

分 类 号：O482.31[理学—固体物理]