广东工业大学学报 ›› 2019, Vol. 36 ›› Issue (01): 75-80.doi: 10.12052/gdutxb.180064

• 综合研究 • 上一篇    下一篇

上转换材料LiY(MoO4)2:Yb3+/Er3+的光学特性以及温度传感特性的研究

黄穗超1, 胡正发1,2, 张伟1   

  1. 1. 广东工业大学 物理与光电工程学院, 广东 广州 510006;
    2. 东源广工大现代产业协同创新研究院, 广东 河源 517000
  • 收稿日期:2018-03-30 出版日期:2019-01-25 发布日期:2018-12-05
  • 通信作者: 胡正发(1972-),男,副研究员,主要研究方向为热致、电致发光材料.E-mail:zhfhu@gdut.edu.cn E-mail:zhfhu@gdut.edu.cn
  • 作者简介:黄穗超(1990-),男,硕士研究生,主要研究方向为上转换发光材料.
  • 基金资助:
    国家自然科学基金资助项目（21271048）；广东省重大科技专项项目（2011A080801015）

The Temperature-Sensor and Optical Properties of Up-Conversion Phosphor LiY(MoO4)2:Yb3+/Er3+

Huang Sui-chao1, Hu Zheng-fa1,2, Zhang Wei1   

  1. 1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. Synergy Innovation Institute for Modern Industries of GDUT, Heyuan 517000, China
  • Received:2018-03-30 Online:2019-01-25 Published:2018-12-05

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摘要： 采用中温固相反应法合成了发光材料LiY （MoO4）2：Yb3+/Er3+，材料具有明显的上转换发光特性.通过X射线衍射仪、荧光光谱对荧光粉的晶体结构以及发光学特性进行了研究.在980 nm激光的激发下，LiY （MoO4）2：Yb3+/Er3+在500~575 nm波长范围内出现很强的绿色发射带，主要是源自Er3+离子2H11/2/4S3/2→4I15/2的能级辐射跃迁.研究发现其在不同功率的激发下能实现光色调控.在298~513 K温度范围内，通过测量其在2H11/2（1）→4I15/2和4S3/2（1）→4I15/2处的荧光强度比，数据拟合图像表明2H11/2（1）/4S3/2（1）热耦合能级上的布居数遵循玻尔兹曼分布，相对灵敏度在298 K达到最大值1.785% K-1，绝对灵敏度在约473 K达到最大值263.20×10-4 K-1，并且热能级2H11/2（1）/4S3/2（1）之间的能隙ΔE为756.71±27.48 cm-1.基于以上分析，LiY （MoO4）2：Yb3+/Er3+荧光粉在温度传感器上具有很好的前景.

关键词: 上转换, 荧光强度比, 温度传感器

Abstract: The phosphors LiY(MoO4)2:Yb3+/Er3+ with remarkable up-conversion emission character were synthesized by means of high-temperature solid state reaction method. Experiments were carried out to determine the crystal structure, up-conversion emission optical properties and temperature sensing of the phosphors. Under 980 nm laser, the LiY(MoO4)2:Yb3+/Er3+ exhibits an intensive green emission bands which can be assigned to 2H11/2/4S3/2→4I15/2 transitions. The temperature sensing properties were studied by measuring the fluorescence intensity ratio of the 2H11/2(1) and 4S3/2(1) emitting energy levels in the temperature range from 298 to 513 K. The maximum relative sensitivity was 1.785% K-1 at 298 K and the maximum absolute sensitivity reach to 263.20×10-4 K-1 at 473 K, and the calculated energy gap ΔE between 2H11/2(1) and 4S3/2(1) levels was 756.71±27.48 cm-1, suggesting that the present phosphor is a suitable candidate for optical temperature sensors.

Key words: up-conversion, fluorescence intensity ratio, temperature sensors

中图分类号: 

  • O482.31
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