Lu^(3+)/Gd(3+)掺杂对KBaYSi_(2)O_(7):Eu^(2+)蓝色荧光粉发光性能影响  

Effect of Lu^(3+)/Gd(3+)Doping on Luminescence Properties of KBaYSi_(2)O_(7):Eu^(2+) Blue Phosphor

作　　者：陈磊 赵文 梁燕 杜甫 叶信宇[3] 林金填 敬刚[2] Chen Lei;Zhao Wen;Liang Yan;Du Fu;Ye Xinyu;Lin Jintian;Jing Gang(Xuyu Optoelectronics(Shenzhen)Co.,Ltd.,Shenzhen 518126,China;Research Insititute of Tsinghua University in Shenzhen,Shenzhen 518057,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]旭宇光电(深圳)股份有限公司,广东深圳518100 [2]深圳清华大学研究院,广东深圳518100 [3]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《中国稀土学报》2022年第5期734-743,共10页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51802203);深圳市知识创新计划项目(JCYJ20180306170604395)资助。

摘　　要：白光LED作为21世纪绿色光源已被广泛使用,当前实现LED白光发射的主流发射光谱在蓝绿(青色)460~495 nm以及深红波段660~690 nm缺失较为严重,另外还存在“富蓝化”问题。因此,开发近紫外365 nm激发的蓝、青、绿、红荧光粉具有重要的实用价值。本研究以热稳定优异且光效较高的KBaYSi_(2)O_(7):Eu^(2+)蓝色荧光粉(λ_(em)=450 nm)为研究对象,当Gd^(3+)+或Lu^(3+)+部分取代Y^(3+)且取代量分别为15%和20%时,其发光强度分别提升了44.2%和46.8%,这主要得益于基质中更多的Eu^(3+)进入到晶格而被还原为Eu^(2+),提升了发光中心离子Eu^(2+)浓度,此外掺杂取代后并未改变样品的热稳定性。本研究开发的蓝色荧光粉在当前主流的近紫外激发用白光LED照明领域具有潜在的应用前景。In the 21st century,white light LED as a green lighting source has been widely applied.The current mainstream way of realizing white light output by LEDs has a serious lack of emission spectra in the blue-green(cyan)460~495 nm and deep red region 660~690 nm,and there is also a"rich blue"problem.Therefore,the development of near-ultraviolet(365 nm)excited blue,cyan,green,and red phosphors has important practical value for white light LED.In this work,KBaYSi_(2)O_(7):Eu^(2+)blue phosphor(λ_(em)=450 nm)with excellent thermal stability and high luminous efficiency was systematically studied.As Gd^(3+)+or Lu^(3+)+partially replaced Y^(3+)with 15%and 20%,the luminescence intensity increased by 44.2%and 46.8%,respectively.This is mainly due to the fact that more Eu^(3+)enters the lattice and is reduced to Eu^(2+),which increases the concentration of the luminescence center Eu^(2+).In addition,the thermal stability of the samples was not changed after substitution.The blue phosphor developed in this study has a potential application in the current mainstream white LED lighting excited by near-ultraviolet chip.

关 键 词：近紫外激发 白光LED 蓝色荧光粉 稀土 

分 类 号：O614.33[理学—无机化学]