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Upconversion effective enhancement of NaYF4:Yb3+/Er3+ nanoparticles by Ni2+ doping

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Abstract

In this manuscript, Ni2+ ions-doped NaYF4:Yb3+/Er3+ nanoparticles have been synthesized via a modified hydrothermal method. The upconversion luminescence intensities of the green (G) and red (R) emission of NaYF4:Yb3+/Er3+ co-doped with 20 mol% Ni2+ ions are the strongest which increase 32.84 and 20.99 times than that without doping Ni2+, respectively. In addition, the R/G ratio decreases with the concentration of Ni2+ increasing from 0 to 40 mol%. The underlying reason for luminescence enhanced and the R/G ratio decreased by Ni2+ doping is explored by a series of controlled experiments, and the mechanism based on the crystal field asymmetry, different substitution by Ni2+, the energy transition of Er3+ is studied in detail. The study indicates that the misshapen crystal field plays an important role in enhancement fluorescence emission, and several factors affect the R/G ratio including the crystal field, the substitution site and the energy transition. Our result may play a certain function for study and design of high-performance upconversion materials.

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Acknowledgements

The authors acknowledge the support from School of Physics and Electronics, Henan University.

Funding

This work is supported by the NSFC-Henan Province Joint Fund (No. U1604144), Program for Science and Technology Innovation Talents in Universities of Henan Province (No. 16HASTIT043), the Science and Technology Development Project of Henan Province (No. 172102410043), the Science Fund of Henan Province (No. 162300410020), and the Science Research Project of Education Department of Henan Province (No. 17A140005).

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Authors and Affiliations

  1. School of Physics and Electronics, Henan University, Kaifeng, 475004, China

    Mengji Yi, Yuefeng Liu, Huiping Gao, Zhangyu Huang, Jiwei Liang & Yanli Mao

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  1. Mengji Yi
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  2. Yuefeng Liu
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  3. Huiping Gao
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  4. Zhangyu Huang
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  5. Jiwei Liang
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  6. Yanli Mao
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Correspondence to Yanli Mao.

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Yi, M., Liu, Y., Gao, H. et al. Upconversion effective enhancement of NaYF4:Yb3+/Er3+ nanoparticles by Ni2+ doping. J Mater Sci 53, 1395–1403 (2018). https://doi.org/10.1007/s10853-017-1601-9

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  • DOI: https://doi.org/10.1007/s10853-017-1601-9

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