Upconversion Luminescence and Optical Temperature-Sensing Properties of LaNbO4:Yb3+/Er3+ Phosphors

  • Xuerui ChengEmail author
  • Xingbang Dong
  • Ke Peng
  • Huanjun Zhang
  • Yuling Su
  • Liying JiangEmail author


In recent years, upconversion (UC) luminescence has attracted considerable attention because of its potential application in temperature measurement. In this work, LaNbO4:Er3+/Yb3+ phosphors are synthesized using a solid-state method. The x-ray diffraction patterns show that the phosphors obtained exhibit a single monoclinic structure, and doping does not change the crystal structure. Intense green and red emissions are observed upon 980-nm excitation. The emission intensity varies with the doping concentration, and the best doping concentrations are 1 mol.% and 10 mol.% for Er3+ and Yb3+ ions, respectively. The possible luminescence mechanism is investigated based on the UC emission dependence on pump power. The temperature-sensing ability is also investigated based on the fluorescence intensity ratio between two thermally coupled levels 2H11/2 and 4S3/2. The maximum sensitivity achieved is 0.81% K−1 at around 430 K, suggesting that the phosphor is a potential candidate for temperature sensing applications.


Upconversion luminescence temperature sensing phosphor Er3+ 


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We gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 11404292), Key Research Project of Higher Education of Henan Province (No. 18B140013) and Key Research Project of the Department of Science and Technology in Henan Province (No. 192102210003).


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© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.School of Physics and Electronic EngineeringZhengzhou University of Light IndustryZhengzhouChina
  2. 2.College of Electrical and Information EngineeringZhengzhou University of Light IndustryZhengzhouChina

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