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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (8): 1470-1477.DOI: 10.16553/j.cnki.issn1000-985x.2025.0029

• 研究论文 • 上一篇    下一篇

Mn4+掺杂四方相CaLaGaO4远红光发射荧光粉的制备及其发光性能

马忠亮1,2(), 段帅毅1,2, 赵玲玲1,2, 鹿桂花1,2, 李玉强1,2(), 刘玉学3, 杨健3()   

  1. 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
    2.伊犁绿色硅基材料工程研究中心,伊宁 835000
    3.东北师范大学物理学院,长春 130024
  • 收稿日期:2025-02-18 出版日期:2025-08-20 发布日期:2025-09-01
  • 通信作者: 李玉强,博士,副教授。E-mail:LYQ_YLSY@163.com;杨 健,博士,实验师。E-mail:yangj079@nenu.edu.cn
  • 作者简介:马忠亮(2001—),男,甘肃省人,硕士研究生。E-mail:1824802957@qq.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金面上项目(2024D01C201);新疆凝聚态相变与微结构实验室开放课题(XJDX0912Z2402);伊犁师范大学校级科研项目(2023YSZD005);大学生创新创业训练项目(202410764013);大学生创新创业训练项目(S202410764025)

Synthesis and Luminescent Properties of Mn4+-Doped Tetragonal-Phase CaLaGaO4 Far-Red Emitting Phosphors

MA Zhongliang1,2(), DUAN Shuaiyi1,2, ZHAO Lingling1,2, LU Guihua1,2, LI Yuqiang1,2(), LIU Yuxue3, YANG Jian3()   

  1. 1.Xinjiang Laboratory of Phase Transitions and Microstructures of Condensed Matter Physics,School of Physical Science and Technology,Yili Normal University,Yining 835000,China
    2.Yili Engineering Research Center of Green Silicon-Based Materials,Yining 835000,China
    3.School of Physics,Northeast Normal University,Changchun 130024,China
  • Received:2025-02-18 Online:2025-08-20 Published:2025-09-01

摘要: 开发Mn4+掺杂的新型远红光氧化物荧光粉是当前植物生长灯用pc-LEDs的研究热点。通过高温固相法,在空气气氛下600 ℃热处理3 h再经1 350 ℃合成5 h,成功制备了四方相CaLaGaO4∶Mn4+荧光粉。该荧光粉可被250~600 nm的紫外和可见光激发。在366 nm紫外光激发下,位于705 nm处的宽带发射峰主要归属于Mn4+2E→4A2能级跃迁,Mn4+最优掺杂浓度为0.4%,浓度猝灭机制是电偶极-电偶极相互作用。298~498 K的变温发射光谱表明,CaLaGaO4∶0.4%Mn4+荧光粉的热激活能为0.418 eV,Mn4+发射光谱与植物光敏色素PR和PFR吸收光谱的重叠度分别为23.8%和51.2%。结果表明,CaLaGaO4∶Mn4+荧光粉可用于pc-LEDs远红光植物生长灯。

关键词: 发光材料; 红光发射荧光粉; Mn4+; CaLaGaO4; 高温固相法; pc-LEDs

Abstract: The development of novel far-red emitting Mn4+ doped oxide phosphors has emerged as a prominent research focus for phosphor-converted light-emitting diodes (pc-LEDs) in plant growth applications. In this study, tetragonal-phase CaLaGaO4∶Mn4+ phosphors were successfully synthesized through a high-temperature solid-state reaction method, involving sequential thermal treatments at 600 ℃ for 3 h followed by sintering at 1 350 ℃ for 5 h in air atmosphere. The CaLaGaO4∶0.4%Mn4+ phosphors can be excited by light at 250~600 nm. Under 366 nm UV excitation, the characteristic broadband emission centered at 705 nm is primarily attributed to the 2E→4A2 transition of Mn4+. Optimal luminescent performance is achieved at a Mn4+ doping concentration of 0.4%, with concentration quenching mechanisms governed by electric dipole-dipole interactions. The temperature-dependent emission spectra (298~498 K) reveal a thermal activation energy of 0.418 eV for the CaLaGaO4∶0.4%Mn4+ phosphors. Notably, the emission spectrum exhibits substantial spectral overlap with plant photoreceptor absorption bands, demonstrating overlap degrees of 23.8% and 51.2% with phytochrome PR and PFR, respectively. These results demonstrate that CaLaGaO4∶Mn4+ phosphors can be used as far-red emitting pc-LEDs for plant growth lighting.

Key words: luminescent material; red-emitting phosphor; Mn4+; CaLaGaO4; high-temperature solid-state method; pc-LEDs

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