Dy^(3+)掺杂Gd_(2)MgTiO_(6)白色荧光粉的制备及发光性能研究  

Preparation and Luminescence Properties of Dy^(3+)Doped Gd_(2)MgTiO_(6) White Phosphor

作　　者：赵炎 蒋小康 高峰 尹红梅 周恒为 ZHAO Yan;JIANG Xiaokang;GAO Feng;YIN Hongmei;ZHOU Hengwei(Xinjiang Laboratory of Condensed Phase Transition and Microstructure,School 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11期2050-2056,共7页Journal of Synthetic Crystals

基　　金：新疆维吾尔自治区重点实验室开放课题(2020D04011);新疆维吾尔自治区物理学重点学科开放课题(XJZDXK-Phy202201);伊犁师范大学一般科研项目(2022YSYB010)。

摘　　要：采用溶胶-凝胶法制备出掺杂不同Dy^(3+)浓度的系列Gd_(2)MgTiO_(6)(GMT)白色荧光粉。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、荧光光谱仪对GMT∶xDy^(3+)(x=0.01、0.03、0.05、0.07、0.09、0.11)样品进行表征。研究结果表明:所制备的系列荧光粉的结构均为单斜晶系,Dy^(3+)成功掺入GMT基质的同时不影响原晶体结构;样品晶粒尺寸在微米量级。在351 nm的近紫外光激发下,样品在483和578 nm处分别显示了极强的蓝光和黄光,其中蓝光归因于Dy^(3+)的^(4)F_(9/2)→^(6)H_(15/2)的能级跃迁,黄光归因于Dy^(3+)的^(4)F_(9/2)→^(6)H_(13/2)能级跃迁;随着Dy^(3+)浓度的不断增加,出现明显的浓度猝灭现象,其机理归因于电偶极子-电偶极子相互作用。当x=0.05时,此时CIE坐标为(0.32471,0.35974),与标准白光的CIE坐标(0.33,0.33)较为接近,表明GMT∶Dy^(3+)是一种具有潜在应用价值的单一基质白色荧光粉。A series of Gd_(2)MgTiO_(6)(GMT)white phosphors doped with different Dy^(3+)concentrations were prepared by the sol-gel method.The GMT∶xDy^(3+)(x=0.01,0.03,0.05,0.07,0.09,0.11)samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),and fluorescence spectroscopy.The research results show that the structure of the prepared series of fluorescent powders is monoclinic,and Dy^(3+)was successfully doped into GMT matrix without affecting the original crystal structure.The grain size of the sample is in the micrometer scale.Under near-ultraviolet excitation at 351 nm,the sample exhibits extremely strong blue and yellow light at 483 and 578 nm,respectively.The blue light is attributed to the^(4)F_(9/2)→^(6)H_(15/2)energy level transition of Dy^(3+),while the yellow light belongs to the^(4)F_(9/2)→^(6)H_(13/2)energy level transition of Dy the continuous increase of Dy^(3+)concentration,there is a significant concentration quenching phenomenon,which is attributed to the interaction between electric dipoles.When x=0.05,the CIE coordinates(0.32471,0.35974)are relatively close to the CIE coordinates of standard white light(0.33,0.33),indicating that GMT∶Dy^(3+)is a single matrix white phosphor with potential application value.

关 键 词：GMT基质 溶胶-凝胶法 Dy^(3+)单掺 w-LED 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]