Abstract
The NaGd(SO4)2: Eu3+/Yb3+,Er3+ nanoparticles were successfully synthesized by a facile hydrothermal method combined with calcination. DTA-TG-DTG, FT-IR, and XRD results reveal that the precursor is composed of gadolinium hydrate with sulfate groups and can convert into pure NaGd(SO4)2 nanoparticles with a dispersed fishing net shape after calcined at 800 °C for 2 h. Upon excitation at 273 nm UV light, the emission spectra of Eu3+-doped phosphors consist of 5D0 → 7Fj (j = 1, 2, 3, 4) transitions and the target NaGd(SO4)2: Eu3+ shows a highest red luminescent intensity than NaGd(SO4)2·H2O: Eu3+ and Gd2O3: Eu3+ phosphors, corresponding to the 5D0 → 7F2 transition of Eu3+. The calculated lifetime of NaGd(SO4)2 is determined to be 2.345 ms. The up-conversion luminescence (UCL) mechanism of Yb3+ and Er3+ co-doped NaGd(SO4)2 and Gd2O3 phosphors were also discussed in the typical energy level diagram for their possible UCL processes.
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Acknowledgments
This work was supported by Liaoning Provincial Student’s Platform for Innovation and Entrepreneurship Training Program (No. 201610148031), Nature Science Foundation of Liaoning Province of China (No. 20170540582), and Foundation of Liaoning Educational Committee (No. L2014149).
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Liu, F., Lian, J., He, J. et al. Hydrothermal synthesis combined with calcination of NaGd(SO4)2 nanoparticles and their luminescent properties from single doped Eu3+ and co-doped Yb3+,Er3+ . J Aust Ceram Soc 53, 847–854 (2017). https://doi.org/10.1007/s41779-017-0098-7
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DOI: https://doi.org/10.1007/s41779-017-0098-7