SrLaLiTeO_(6):Dy^(3+),Eu^(3+)荧光粉的制备及发光性能研究  

Preparation and luminescence properties of SrLaLiTeO_(6):Dy^(3+),Eu^(3+)phosphors

作　　者：龚劲松 朱齐 郑小州 夏鹏举 刘凯 徐慢[1] 戴武斌 GONG Jinsong;ZHU Qi;ZHENG Xiaozhou;XIA Pengju;LIU Kai;XU Man;DAI Wubin(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2024年第3期274-279,共6页Journal of Wuhan Institute of Technology

基　　金：湖北省技术创新专项(2016ACA160);武汉工程大学博士启动基金(16QD28);武汉工程大学第十四届研究生教育创新基金(CX2022242)。

摘　　要：白光发光二极管(LED)的商业合成方案缺少红光成分,导致合成的白光色温较高、显色性差,因此开发性能优异的单相暖白光荧光粉成为白光LED领域研究的重要课题。以Dy^(3+)和Eu^(3+)为掺杂剂,SrLaLiTeO_(6)(SLLT)为基质,采用固相反应法制备了SrLaLiTeO6:Dy^(3+),Eu^(3+)无机荧光粉,并通过X射线衍射仪、荧光分光光度计和色度坐标分析荧光粉的晶体结构及光学性能。结果表明:Dy^(3+)和Eu^(3+)成功进入SLLT晶体,无杂质产生;SLLT:0.07Dy^(3+),yEu^(3+)荧光粉在351 nm激发下能够同时发射蓝、黄、红光,证明了Dy^(3+)和Eu^(3+)之间存在能量传递,弥补了单掺Dy^(3+)荧光粉缺乏红色发射的缺陷;Eu^(3+)离子最佳掺杂浓度为0.05,此时的色度坐标为(0.391 9,0.380 9),色温为3 733 K,接近暖白光区域。因此,SrLaLiTeO_(6):Dy^(3+),Eu^(3+)荧光粉是一种性能优异的暖白光LED荧光粉。The commercial synthesis scheme of white light emitting diode(LED)lacks a red light component,resulting in high color temperature and poor color rendering of the synthesized white light.Therefore,the development of single-phase warm white phosphors with excellent performance has always been an important research topic in the field of white LED.SrLaLiTeO_(6):Dy^(3+),Eu^(3+)inorganic phosphors were prepared by a solid state reaction method with Dy^(3+)and Eu^(3+)as dopants and SrLaLiTeO_(6)(SLLT)as matrix.The crystal structure and optical properties of the phosphors were analyzed by X-ray diffraction,fluorospectrophotometry and chromaticity coordinates analysis.The results show that Dy^(3+)and Eu^(3+)successfully enter the SLLT crystal,which does not produce impurities.SLLT:0.07Dy^(3+),yEu^(3+)phosphors can simultaneously emit blue,yellow and red light under 351 nm excitation,which proves that there is an energy transfer between Dy^(3+)and Eu^(3+)to make up for the lack of red emission of single-doped Dy^(3+)phosphors.The optimum doping concentration of Eu^(3+)ion is 0.05,where the chromaticity coordinate is(0.3919,0.3809),the correlated color temperature is 3733 K,which is close to the warm white light region.Consequently,SrLaLiTeO_(6):Dy^(3+),Eu^(3+)phosphor is an excellent warm white LED phosphor.

关 键 词：荧光粉 发光性能 SrLaLiTeO_(6):Dy^(3+) Eu^(3+) 暖白光 固相反应 

分 类 号：O482.31[理学—固体物理]