Journal of Guangdong University of Technology ›› 2019, Vol. 36 ›› Issue (01): 75-80.doi: 10.12052/gdutxb.180064

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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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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

CLC Number: 

  • O482.31
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