白光LED用新型Ce,Pr掺杂的YAG单晶荧光材料的光谱性能研究  

Spectra Characteristics of New Developed Ce,Pr doped YAG Phosphor for White-LED

作　　者：华伟[1] 向卫东[1] 董永军[2] 梁晓娟[1] 杨帆[1] 金怀东[1] 梁续[2] 吕春燕[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]中国科学院上海光学精密机械研究所,上海201800 [3]湖州师范学院化学系,浙江湖州313000

出　　处：《光子学报》2011年第6期907-911,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.60708021);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);温州科技计划项目(No.G20090082);浙江省科技厅重大科技专项国际科技合作项目(No.2008C14088);浙江省自然科学基金重点基金(No.Z4110347)资助

摘　　要：为了改善白光LED用荧光材料效率低、均匀性差、光衰大、寿命短及物化性能差等不足,本文采用单晶荧光材料取代荧光粉来制备白光LED,并对白光LED用新型YAG单晶荧光材料的制备和光谱性能进行了研究.采用提拉法生长了白光LED用Ce∶YAG及Pr,Ce∶YAG晶体,并通过吸收光谱,激发、发射光谱对晶体材料的光谱特性进行表征.研究表明,Ce∶YAG单晶荧光材料可以被发射波长460 nm左右的蓝光芯片有效激发,产生一个范围为480~650 nm宽峰发射.通过Pr3＋,Ce3＋离子共掺杂可以有效补偿Ce3＋离子单掺杂YAG荧光材料发光中的红色发光成分.In order to improve the shortages of the phosphor for white LED,including low efficiency,poor uniformity,large light decline,short life,and poor physical and chemical characteristics,etc.,single crystals phosphor was studied as a substitute.Growth and spectra characteristics of Ce doped and Ce,Pr-codoped YAG single crystals phosphor used for white LED were investigated.Ce∶YAG and Pr,Ce∶YAG single crystals were grown by Czochralski method,and its luminescence properties were studied by means of absorption,emission and excitation spectra.Date analysis reveals that broad emission band ranging from 480~650nm,is produced with blue light excitation.It has been found that red light component of Ce∶YAG phosphor,which is important to improve the color rendering index,can be efficiently compensated by Pr-codoping.

关 键 词：荧光材料 单晶 光谱 Ce∶YAG 共掺杂 白光LED 

分 类 号：O437[机械工程—光学工程]