光子学报, 2018, 47 (9): 0916003, 网络出版: 2018-09-15
白光LED用LiYF4∶Pr3+微晶玻璃的发光性能研究
Luminescent Properties of Pr3+ Doped LiYF4 Glass Ceramics for White Light-emitting Diodes
微晶玻璃 荧光性能 白光 色坐标 LiFY4∶Pr3+ LiFY4∶Pr3+ Glass ceramics Luminescent properties White light Chromaticity coordinate
摘要
采用高温熔融法制得组分为43SiO2-23Al2O3-27LiF-17YF3-xPr2O3(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 Pr3+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±4 nm.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 444 nm 的激发下, 掺杂 Pr3+离子浓度为 0.3 mol 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.
Abstract
xPr3+-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 LiYF4: Pr3+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 Pr3+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.
曹慧, 郑斌, 谷招峰, 胡建旭, 张约品. 白光LED用LiYF4∶Pr3+微晶玻璃的发光性能研究[J]. 光子学报, 2018, 47(9): 0916003. CAO Hui, ZHENG Bin, GU Zhao-feng, HU Jian-xu, ZHANG Yue-pin. Luminescent Properties of Pr3+ Doped LiYF4 Glass Ceramics for White Light-emitting Diodes[J]. ACTA PHOTONICA SINICA, 2018, 47(9): 0916003.