期刊
JOURNAL OF LUMINESCENCE
卷 178, 期 -, 页码 307-313出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.06.009
关键词
CaCO3; Photoluminescence; Europium; Gadolinium; Energy transfer; Charge compensation
类别
资金
- National Natural Science Foundation of China [51272085]
- Openning Research Funds Projects of the State Key Laboratory of Inorganic Synthesis and Preparative [2016-01]
Gd3+ and Eu3+ ions co-doped CaCO3 nanoparticles have been successfully synthesized via carbonization method. The emission spectra of co-doped CaCO3 phosphors in the range of VUV-vis spectral were studied. The results reveal that the co-doped CaCO3 phosphors show intense red emission in the VUV range because of the Gd3+ ions as sensitizers. The energy transfer process from Gd3+ to Eu3+ in CaCO3:Gd3+/Eu3+ phosphors was investigated and discussed in terms of the luminescence spectra and the decay curves, which demonstrated that the energy transfer of Gd3+-> Eu3+ is efficient. The mechanism of energy transfer from Gd3+ to Eu3+ is a resonant transfer, in which electric dipole-dipole interaction plays a leading role. Furthermore, the effect of doping concentration of Eu3+ ions on the energy transfer efficiency was also investigated. From the photoluminescence (PL) spectra, it was also found that the incorporation of Na+ ions into CaCO3:Gd3+/Eu3+ could lead to a remarkable increase of luminescent intensity due to the charge compensation. (C) 2016 Elsevier B.V. All rights reserved.
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