Ce:YAG微晶玻璃制备及光谱性能  

Preparation and Luminescence Properties of Ce:YAG Glass Ceramics

作　　者：金怀东[1] 向卫东[1,2] 黄海宇[1] 杨帆[1] 华伟[1] 梁晓娟[1] 董永军[3] 

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：《硅酸盐学报》2011年第4期646-651,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(60708021);浙江省国际科技合作项目(2008C14088);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);上海基础研究重点项目(09JC1414900);上海光技术专项(09DZ1 142002);上海光技术专项(No.10DZ1140400)资助项目

摘　　要：在Y_2O_3-Al_2O_3-SiO_2-Li_2O-K_2O-Na_2O基质玻璃中掺入Ce,经过不同温度热处理,制备出白光LED用Ce:Y_3Al_5O_(12)(Ce:YAG)微晶玻璃。利用X射线衍射仪、X射线光电子能谱仪、场发射扫描电子显微镜、荧光光度计等方法对微晶玻璃的晶相、所掺杂Ce的价态、微观形貌以及光谱性能进行了研究。结果表明:热处理温度达到1380℃时可以得到纯的YAG晶相,并且所掺杂Ce的价态绝大部分为Ce^(3+);该微晶玻璃在466nm的特征激发峰预示着它能够被蓝光有效激发;在蓝光激发下,该微晶玻璃在480～650nm产生有效发射,发射光谱中心波长为531nm;当CeO_2的掺杂摩尔分数为0.75%时,该微晶玻璃具有较好的发光强度,其平均荧光寿命为58.99ns。Ce：Y_3Al_5O_（12）（Ce：YAG） glass ceramics used in white-LED were prepared by a route of Ce doped in Y_2O_3-Al_2O_3-SiO_2-Li_2O -K_2O-Na_2O glass matrix at different heat treatment temperatures.The crystalline phase structure,Ce-doped valence states,morphology, and photoluminescence properties of the glass ceramics were investigated by X-ray diffractometer,X-ray photoelectron spectroscopy,Field-emission scanning electron microscopy and photoluminescence.The results show that the pure YAG phase structure can be obtained at 1 380℃,and Ce-doped valence states are mostly Ce^（3＋） in the glass ceramics.The characteristic excitation peak located at 466 nm of the Ce：YAG glass ceramics indicated that the glass-ceramics could be effectively excited by blue light.Furthermore, a broad emission band center located at 531 nm was observed from 480 to 650 nm using blue light excitation,and the emission intensity of the glass-ceramics was better when mole fraction of CeO_2 in the glass-ceramics was 0.75%,and the average lifetime of the glass-ceramics was 58.99 ns.

关 键 词：白光发光二极管 铈掺杂钇铝石榴石 微晶玻璃 荧光 

分 类 号：TQ171[化学工程—玻璃工业]