Dy^(3+)掺杂Y_(2)MgTiO_(6)荧光粉的制备及发光性质研究  

Synthesis and Luminescence Property of Dy^(3+)Doped Y_(2)MgTiO_(6)Phosphor

作　　者：蒋小康 张王曦月 高峰 周恒为 JIANG Xiaokang;ZHANG Wangxiyue;GAO Feng;ZHOU Hengwei(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics,College of Physical Science and Technology,Yili Normal University,Yining 835000,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,伊宁835000

出　　处：《人工晶体学报》2023年第10期1809-1815,共7页Journal of Synthetic Crystals

基　　金：伊犁师范大学一般科研项目(2022YSYB010)。

摘　　要：通过溶胶-凝胶法制备出一系列Dy^(3+)掺杂的Y_(2)MgTiO_(6)(YMT∶Dy^(3+))荧光粉,并利用X射线衍射仪、扫描电子显微镜、荧光光谱仪对荧光粉的晶体结构、微观形貌及发光性质进行研究和分析。研究结果显示,YMT∶Dy^(3+)荧光粉为双钙钛矿结构,Dy^(3+)掺杂不改变样品的晶体结构。在近紫外光(352 nm)的激发下,样品的发射光谱显示出典型的Dy^(3+)特征发射峰,分别是485 nm处的蓝光、578 nm处的黄光,以及650~700 nm的红光。当Dy^(3+)摩尔浓度x=0.03时,荧光粉出现浓度猝灭效应,其浓度猝灭机制为电偶极子-电偶极子相互作用(d-d)。YMT∶Dy^(3+)荧光粉的CIE色坐标明显受到Dy^(3+)的浓度影响,其中YMT∶0.02Dy^(3+)荧光粉的CIE色坐标为(0.406,0.407),位于暖白光区,可作为一种暖白光荧光粉应用于近紫外激发白光发光二极管(w-LEDs)。A series of Dy^(3+)doped Y 2 M g TiO 6 phosphors(YMT∶Dy^(3+))were synthesized by sol-gel method.The morphology,crystal structure and luminescence properties of these phosphors were characterized and analyzed by XRD,SEM and fluorescence analyzer.The results show that YMT∶Dy^(3+)phosphor has a double perovskite structure,and Dy^(3+)doping does not change the crystal structure of the sample.Under the excitation of near UV light(352 nm),the emission spectrum of the sample shows typical Dy^(3+)characteristic emission,which is located at 485 nm in blue light region,578 nm in yellow region and 650~700 nm in red region respectively.The concentration quenching occurred when the molar concentration of Dy^(3+)x=0.03 for YMT∶Dy^(3+)phosphor and its mechanism is ascribed to dipole-dipole interaction(d-d).The CIE color coordinates of YMT∶Dy^(3+)phosphors are significantly affected by the concentration of Dy^(3+).Among them,the CIE color coordinate for YMT∶0.02Dy^(3+)phosphor is(0.406,0.407),which is located in the warm white light region,and shows potential application for the n-UV excited warm white light emitting diodes(w-LEDs).

关 键 词：溶胶-凝胶法 Dy^(3+)掺杂 Y_(2)MgTiO_(6) 双钙钛矿结构 暖白光 白光发光二极管 

分 类 号：O482.31[理学—固体物理] TN312[理学—物理]