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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (4): 643-651.DOI: 10.16553/j.cnki.issn1000-985x.2024.0234

• 研究论文 • 上一篇    下一篇

Li2Mg3TiO6:Eu3+红色荧光粉的合成及其在白光LED上的应用

李鹏程1, 周军2, 王伟刚3, 吴坤尧3, 李兆3   

  1. 1.西安建筑科技大学材料科学与工程学院,西安 710055;
    2.西安建筑科技大学化学与化工学院,西安 710055;
    3.西安航空学院材料工程学院,西安 710077
  • 收稿日期:2024-09-29 出版日期:2025-04-15 发布日期:2025-04-28
  • 通信作者: 周 军,博士,教授。E-mail:zhoujun@xauat.edu.cn; 李 兆,博士,教授。E-mail:pylizhao@163.com
  • 作者简介:李鹏程(1987—),男,陕西省人,博士研究生。E-mail:pengchengli@xauat.edu.cn
  • 基金资助:
    国家自然科学基金(51474170);陕西省自然科学基础研究计划(2024JC-YBQN-0158);西安市科技计划项目(GXYD9.2)

Preparation of Li2Mg3TiO6:Eu3+ Red Phosphors and Its Application in White LED

LI Pengcheng1, ZHOU Jun2, WANG Weigang3, WU Kunyao3, LI Zhao3   

  1. 1. College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
    2. School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
    3. School of Materials Engineering, Xi’an Aeronautical Institute, Xi’an 710077, China
  • Received:2024-09-29 Online:2025-04-15 Published:2025-04-28

摘要: 通过高温固相法合成了Li2Mg3TiO6:Eu3+红色荧光粉。采用X射线衍射仪(XRD)对物相结构进行分析;扫描电子显微镜(SEM)对微观形貌进行表征;荧光光谱仪(PL)对粉体进行光学性能测试。结果表明:Eu3+掺入后Li2Mg3TiO6晶体结构没有发生改变;样品颗粒分布均匀,平均粒径尺寸为2.8 μm;Li2Mg3TiO6:Eu3+的最佳激发峰位于398 nm,最强发射峰位于617 nm,最佳掺杂浓度为7%。样品具有良好的热稳定性,在500 K时,发光强度可保持初始强度的60%,与市售荧光粉按照一定比例组合封装得到发光二极管(LED)器件,器件色坐标为(0.327 4,0.338 8),显色指数为80,Li2Mg3TiO6:Eu3+红色荧光粉可应用于近紫外激发的白光LED器件中。

关键词: Li2Mg3TiO6:Eu3+, 白光LED, 高温固相法, 红色荧光粉, 光学性能

Abstract: Li2Mg3TiO6:Eu3+ red phosphor was synthesized by high-temperature solid-phase method. The phase structure was analyzed by X-ray diffractometer (XRD); the microscopic morphology was characterized by scanning electron microscope (SEM); the optical properties of the powders were tested by fluorescence spectrometer (PL). The results show that the crystal structure of Li2Mg3TiO6:Eu3+ did not change after Eu3+ doping; the sample particles are uniformly distributed with an average particle size of 2.8 μm; the optimal excitation peak of Li2Mg3TiO6:Eu3+ is located at 398 nm, the strongest emission peak is located at 617 nm, and the optimal doping concentration is 7%. The luminescence intensity maintained 60% of its initial intensity at 500 K due to its stable thermal ability. CIE chromatic coordinate of (0.327 4, 0.328 8),and a color rendering index (CRI) of 80. Combined with commercially available phosphors in a certain ratio to obtain light-emitting diode (LED) devices, Li2Mg3TiO6:Eu3+ red phosphors have potential applications in white LED.This red phosphor can be applied to the LED devices excited by near-ultraviolet chip.

Key words: Li2Mg3TiO6:Eu3+, white LED, high-temperature solid-phase method, red phosphor, optical property

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