Dy^(3+)-doped LiYF_4 crystals for UV-excited white light-emitting diodes  

作　　者：唐磊 夏海平 汪沛渊 彭江涛 江浩川 

机构地区：[1]Key Laboratory of Photo-Electronic Materials,Ningbo University [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2013年第6期54-57,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51272109 and 50972061);the Natural Science Foundation of Zhejiang Province(Nos. R4100364 and Z4110072);the Natural Science Foundation of Ningbo City (No. 2012A610115);the K. C. Wong Magna Fund in Ningbo University

摘　　要：A Dy3＋-doped LiYF4 single crystal capable of generating white light by simultaneous blue and yellow light emission of phosphorescent centers is produced. Chromaticity coordinates and photoluminescence intensity vary with excitation wavelength. Under 350, 365, and 388 nm excitation, the crystal shows excellent white light emission. The most efficient wavelength for white light is 388 nm. The CIE coordina.tes are x=0.316 and y =0.321, and the color temperature （Tc） is 6 368 K. These results indicate that the studied crystal is a potential candidate for ultraviolet light-excited white light-emitting diodes.A Dy3＋-doped LiYF4 single crystal capable of generating white light by simultaneous blue and yellow light emission of phosphorescent centers is produced. Chromaticity coordinates and photoluminescence intensity vary with excitation wavelength. Under 350, 365, and 388 nm excitation, the crystal shows excellent white light emission. The most efficient wavelength for white light is 388 nm. The CIE coordina.tes are x=0.316 and y =0.321, and the color temperature （Tc） is 6 368 K. These results indicate that the studied crystal is a potential candidate for ultraviolet light-excited white light-emitting diodes.

关 键 词：DY doped LiYF4 crystals for UV-excited white light-emitting diodes LEDS UV 

分 类 号：TN312.8[电子电信—物理电子学] TQ131.1[化学工程—无机化工]