1. Synthesis and luminescence properties of NaGdF4: Yb3+, Ce3+, and Ho3+ upconversion nanoparticles doped with Zn2+.
- Author
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Kuang, Ye, Xu, Jiating, Wang, Chen, Wang, Chuanqing, Shao, Hua, Yang, Dan, Gai, Shili, He, Fei, and Yang, Piaoping
- Subjects
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PHOTON upconversion , *LUMINESCENCE , *DOPING agents (Chemistry) - Abstract
Improving luminescence intensities of rare-earth (RE)-doped upconversion nanoparticles (UCNPs) have aroused great attention recently. In this study, NaGdF4: Yb3+, Ce3+, and Ho3+ UCNPs doped with varying concentrations of Zn2+ were synthesized in one step by high temperature pyrolysis using oleate chemicals. X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ICP-MS (inductively coupled plasma-mass spectrometry), upconversion emission spectra and luminescence lifetimes were used to study the samples. It was found that as the concentration of Zn2+ increased from 0 to 15 mol%, the luminescence intensities of both red and green emissions first increased and then decreased, with the maximum value of Zn2+ doping at 10 mol%. We concluded that Zn2+ dopant and F− vacancies accounted for the intensity changes. Our research can be beneficial for the structural design and applications of RE-doped UCNPs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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