Effect of co-doped Tb3+ ions on electroluminescence of ZnO:Eu3+ LED

  • Miaoling Huang
  • Shenwei Wang
  • Guangmiao Wan
  • Xinwu Zhang
  • Yanwei Zhang
  • Kai Ou
  • Lixin Yi
Article
  • 94 Downloads

Abstract

Rare earth (RE) -doped ZnO electroluminescence is worthy of investigation for phosphor-free white light-emitting diodes (LEDs) due to their pure and sharp emissions. Whereas, the low solubility of RE ions in ZnO films is found to hinder the performance of RE-doped ZnO devices. Herein, ZnO:Eu and ZnO:Eu/Tb LEDs were synthesized and the electroluminescence properties were tested. The results show that the emission intensity of ZnO: Eu/Tb LED is 8 times higher than that of ZnO: Eu LED while the input power is smaller when the concentration of terbium is proper. Furthermore, we discussed the excitation mechanism and found that the ratio of the EL intensity of the 5D1 → 7F1 to 5D0 → 7FJ (J=0 − 4) transition increases with increasing Tb doping concentration, which may indicate the possibility of energy transfer from Tb3+ to Eu3+. The results are believed to be an effective strategy to improve the electroluminescence of RE-doped semiconductor for white LEDs.

Notes

Acknowledgements

This work was supported by the Key Laboratory of Luminescence and Optical Information of China in Beijing Jiaotong University with financial aid from the National Natural Science Foundation of China (Grant Nos. 60977017, 61275058), the Fundamental Research Funds for the Central Universities (2013JBM101), and Beijing Jiaotong University Foundation (S16PD00220).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Miaoling Huang
    • 1
  • Shenwei Wang
    • 1
  • Guangmiao Wan
    • 1
  • Xinwu Zhang
    • 1
  • Yanwei Zhang
    • 1
  • Kai Ou
    • 1
  • Lixin Yi
    • 1
  1. 1.Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic TechnologyBeijing Jiaotong UniversityBeijingPeople’s Republic of China

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