Ce,Pr掺杂的YAG微晶玻璃的制备及光谱性能  

Preparation and Luminescence Properties of Ce,Pr Doped YAG Glass Ceramics

作　　者：金怀东[1] 向卫东[1,2] 黄海宇[1] 杨帆[1] 华伟[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,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：《无机化学学报》2011年第7期1285-1290,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.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);浙江省自然科学基金重点基金(No.24110347);温州市科技局计划项目(G20090082);上海基础研究重点项目(No.09JC1414900);上海光技术专项(No.09DZ1142002);上海光技术专项(No.10DZ1140400)资助

摘　　要：以Y2O3-A12O3-SiO2-Li2O-K2O-Na2O玻璃作为Ce,Pr掺杂基质玻璃,制备出白光LED用Ce:YAG和Ce,Pr:YAG微晶玻璃。使用X射线衍射仪、场发射扫描电子显微镜、荧光光度计对微晶玻璃的晶相、微观形貌、光谱性能及荧光寿命进行了研究。结果表明:掺杂铈或铈镨共掺杂的基质玻璃在1400℃热处理得到YAG纯相;Ce:YAG和Ce,Pr:YAG微晶玻璃在466 nm有特征激发峰;在蓝光芯片激发下,Ce:YAG微晶玻璃在480～700 nm产生有效发射,发射光谱中心波长531 nm,铈镨共掺微晶玻璃在609 nm有窄的发射峰,能提高LEDs的显色性。浓度掺杂实验表明镨的较佳掺杂浓度是Ce:Pr为5:6。Ce:YAG和Ce,Pr:YAG微晶玻璃的荧光衰减曲线表明:Ce:YAG微晶玻璃荧光寿命比Ce,Pr:YAG微晶玻璃长。Using Y2O3-A12O3-SiO2-Li2O-K2O-Na2O as Ce-doping or Ce,Pr co-doping glass matrix,Ce：YAG and Ce,Pr：YAG glass ceramic for White-LED（WLED） was prepared by heat treatment of the glass matrix.The formation of YAG crystal phase,morphology,luminescence properties and lifetime were examined by X-ray diffraction（XRD）,Field-emission scanning electron microscopy（FE-SEM） and photoluminescence spectroscopy.XRD analysis indicates that pure YAG phase is formed by heat treating at 1 400 ℃.Characteristic excitation peak located at 466 nm is observed in the excitation spectra of the Ce：YAG or Ce,Pr：YAG glass ceramic.A broad emission band from 480～700 nm,centered at 531 nm is produced with blue light excitation.A narrow emission peak is located at 609 nm in Ce,Pr：YAG glass ceramic,which may improve the color rendering index（CRI）of WLED.Different Pr-codoping experiments show that the maximum is achieved with samples doped with the 5：6（nCe：nPr） ratio.Decay curves for the fluorescence of Ce：YAG glass-ceramic test show that the lifetime of the Ce：YAG glass ceramic is longer than that of the Ce,Pr：YAG glass ceramic.

关 键 词：白光LED Ce Pr:YAG 微晶玻璃 荧光 

分 类 号：O614.332[理学—无机化学] O614.334[理学—化学]