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人工晶体学报 ›› 2023, Vol. 52 ›› Issue (11): 2050-2056.

• 研究论文 • 上一篇    下一篇

Dy3+掺杂Gd2MgTiO6白色荧光粉的制备及发光性能研究

赵炎, 蒋小康, 高峰, 尹红梅, 周恒为   

  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
  • 收稿日期:2023-06-09 出版日期:2023-11-15 发布日期:2023-11-17
  • 通信作者: 周恒为,教授。 E-mail:zhw33221@163.com
  • 作者简介:赵炎(1998—),男,河南省人,硕士研究生。 E-mail:210089677@qq.com
  • 基金资助:
    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)

Preparation and Luminescence Properties of Dy3+ Doped Gd2MgTiO6 White Phosphor

ZHAO Yan, JIANG Xiaokang, GAO Feng, YIN Hongmei, ZHOU Hengwei   

  1. Xinjiang Laboratory of Condensed Phase Transition and Microstructure, School of Physical Science and Technology, Yili Normal University, Yining 835000, China
  • Received:2023-06-09 Online:2023-11-15 Published:2023-11-17

摘要: 采用溶胶-凝胶法制备出掺杂不同Dy3+浓度的系列Gd2MgTiO6(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:xDy3+(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,Dy3+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Dy3+4F9/26H15/2的能级跃迁,黄光归因于Dy3+4F9/26H13/2能级跃迁;随着Dy3+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(0.324 71, 0.359 74),与标准白光的CIE坐标(0.33,0.33)较为接近,表明GMT:Dy3+是一种具有潜在应用价值的单一基质白色荧光粉。

关键词: GMT基质, 溶胶-凝胶法, Dy3+单掺, w-LED

Abstract: A series of Gd2MgTiO6 (GMT) white phosphors doped with different Dy3+ concentrations were prepared by the sol-gel method.The GMT:xDy3+(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 Dy3+ 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 4F9/26H15/2 energy level transition of Dy3+, while the yellow light belongs to the 4F9/26H13/2 energy level transition of Dy the continuous increase of Dy3+ concentration, there is a significant concentration quenching phenomenon, which is attributed to the interaction between electric dipoles. When x=0.05, the CIE coordinates (0.324 71, 0.359 74) are relatively close to the CIE coordinates of standard white light (0.33, 0.33), indicating that GMT:Dy3+ is a single matrix white phosphor with potential application value.

Key words: GMT matrix, sol-gel method, Dy3+ monodoping, w-LED

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