白光LED用LiYF_4∶Pr^(3+)微晶玻璃的发光性能研究  

Luminescent Properties of Pr^(3+) Doped LiYF_4 Glass Ceramics for White Light-emitting Diodes

作　　者：曹慧 郑斌 谷招峰 胡建旭[1] 张约品[1] CAO Hui;ZHENG Bin;GU Zhao-feng;HU Jian-xu;ZHANG Yue-pin(Laboratory of Photo-Electronic Material,School of Material Science Chemical Engineering,Ningbo University,Ningbo,Zhejiang 315211,China)

机构地区：[1]宁波大学材料与化学工程学院光电子功能材料实验室,浙江宁波315211

出　　处：《光子学报》2018年第9期58-66,共9页Acta Photonica Sinica

基　　金：浙江省自然科学基金(No.LY18F050006);宁波大学王宽城幸福基金资助~~

摘　　要：采用高温熔融法制得组分为43SiO_2-23Al_2O_3-27LiF-17YF_3-xPr_2O_3(x=0.05、0.1、0.15、0.2)(mol%)的前驱玻璃.玻璃样品分别经530℃、540℃和550℃热处理后,制备出一系列Pr^(3+)离子掺杂含LiYF4晶粒的微晶玻璃.晶相由X射线衍射与透射电子显微镜证实,晶粒平均尺寸为14±4nm.紫外-可见分光光度计证实微晶玻璃具有良好的透光性.研究热处理前后样品的光谱特性和荧光寿命,对封装成LED后的相关参数进行测试.结果表明,在波长444nm的激发下,掺杂Pr^(3+)离子浓度为0.3mol且热处理温度为550℃的微晶玻璃具有最高光输出强度,封装成LED后发射出白光,其色坐标为x=0.33,y=0.35.x Pr^3+-activated 43SiO2-23Al2O3-27LiF-17YF3(x=0.1、0.2、0.3、0.4)(mol%)glass were synthesized by a conventional melting technique,and then annealed at 530℃,540℃and 550℃,respectively.Transparent LiYF 4:Pr 3+glass ceramics were successfully prepared.X-ray diffraction and transmission electron microscope were used to monitor the crystalline phase structure after the glass specimens were annealed at temperature increasing from 530℃to 550℃,the average size of nanocrystals in glass ceramics was 14±4 nm.The UV-visible spectra were used to monitor the transparency remained at a high level.The spectral properties and lifetime of glass and glass ceramics were investigated.The parameters of LED also be investigated.Under 404 nm excitation,the glass ceramics which doped 0.3 mol Pr^3+ion and heated at 550℃had the highest light output intensity,when it was made into LED,it produced white light.The calculated color coordinates of the LED was located in x=0.33,y=0.35.

关 键 词：LiFY4∶Pr^3+ 微晶玻璃 荧光性能 白光 色坐标 

分 类 号：TQ171[化学工程—玻璃工业]