A novel Eu^(3+)-doped phosphor-in-glass for WLEDs and the effect of borophosphate matrix  

作　　者：Teng Ma Haohong Chen Luqiao Yin Fang Lei Ying Shi Jianjun Xie Lei Zhang Lingcong Fan 

机构地区：[1]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [2]Key Laboratory of Transparent Opto-functional Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China [3]Key Laboratory of Advanced Display and System Applications,Shanghai University,Shanghai 200072,China

出　　处：《Journal of Rare Earths》2023年第2期190-199,共10页稀土学报（英文版）

基　　金：Project supported by the Joint Funds of the National Natural Science Foundation of China(U1932160);the National Natural Science Foundation of China(51605272)。

摘　　要：Phosphor-in-glass(PiG)is a potential color convertor for high power WLEDs.A novel glass matrix with advanced performance is still a challenge.Recently,Eu^(3+)doped glass matrix has attracted much consideration mainly due to its red compensation.A new borophosphate matrix to realize Eu^(3+)red light was designed in the Na_(2)O-ZnO-P_(2)O_(5)-B_(2)O_(3)-Eu_(2)O_(3)system.Meanwhile,a series of PiGs composed of different concentrations of Y3Al5O12:Ce phosphor and the matrix were also fabricated by re-sintering.The crystallization of Eu^(3+)based phosphate offers a novel red emission quenching apart from normal concentration quenching in the glass system.No direct energy transfer but only little reabso rption occurs between Eu^(3+)and Ce^(3+)ions.The Ce^(3+)concentration effect is obvious on the electroluminescent color.The optimized color rendering index of 79.7,the CIE coordinates near natural white and the range of CCT from 3943 to 6097 K were obtained for the packaged white light emitting diodes(WLEDs)together with the excellent CCT stability higher than about 97.5%and the quadruple thermal conductivity than that of silicon resin.The work implies borophosphate glass based PiGs with fine transparence and energy conversion efficiency are promising for excellent WLEDs,while the LED by using the PiG sample without any yellow phosphor doped is of high color purity and has a potential use as the 465 nm blue source.

关 键 词：Phosphor-in-glass Eu^(3+)ion Borophosphate glass WLEDs YAG:Ce Rare earths 

分 类 号：TQ422[化学工程]