کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5398426 1505883 2016 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescent properties and energy transfer of Gd3+/Eu3+ co-doped cubic CaCO3
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Luminescent properties and energy transfer of Gd3+/Eu3+ co-doped cubic CaCO3
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 178, October 2016, Pages 307-313
نویسندگان
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