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Synthesis, optical properties, and energy transfer of Ce3+/Tb3+ co-doped MyGdFx (M=Li, Na, K).

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Title: Synthesis, optical properties, and energy transfer of Ce3+/Tb3+ co-doped MyGdFx (M=Li, Na, K).
Authors: Chunyan Cao1 caoyan_80@126.com, Zhiyang Luo2, Siling Guo1, Renping Cao1, Hyeon Mi Noh3, Jung Hyun Jeong3 jhjeong@pknu.ac.kr, An Xie4 anxie@xmut.edu.cn
Source: Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy. Dec2014, Vol. 133, p457-462. 6p.
Subjects: Energy transfer, Rare earth ions, Optical properties, Inorganic synthesis, Doping agents (Chemistry), Temperature effect
Abstract: Through a solid-state reaction method, the Ce3+/Tb3+ co-doped MyGdFx (M=Li, Na, K; x=3, 4, 6; y=0, 1, 3) system samples have been synthesized by controlling the annealing temperatures and the ratios of raw materials. The samples were characterized by X-ray diffraction (XRD) patterns, photoluminescence (PL) excitation and emission spectra as well as luminescent dynamic decay curves. The experimental results suggest that the LiF is more difficult to react with the prepared material compared that of NaF or KF under similar reaction conditions. The samples crystallized in different crystalline phases. The energy transfer from Ce3+ to Tb3+ or Ce3+ to Gd3+ to Tb3+ has been observed in all the samples. The Ce3+ and Tb3+ present different optical properties for they are sensitive to the local environment. In addition, the deduced lifetime of Tb3+5D4→7F5 transition decreases in the same system samples with the annealing temperature increasing. The deduced lifetime of Tb3+5D4→7F5 also decreases with the increase of the KF concentration in the KF system samples. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Through a solid-state reaction method, the Ce3+/Tb3+ co-doped MyGdFx (M=Li, Na, K; x=3, 4, 6; y=0, 1, 3) system samples have been synthesized by controlling the annealing temperatures and the ratios of raw materials. The samples were characterized by X-ray diffraction (XRD) patterns, photoluminescence (PL) excitation and emission spectra as well as luminescent dynamic decay curves. The experimental results suggest that the LiF is more difficult to react with the prepared material compared that of NaF or KF under similar reaction conditions. The samples crystallized in different crystalline phases. The energy transfer from Ce3+ to Tb3+ or Ce3+ to Gd3+ to Tb3+ has been observed in all the samples. The Ce3+ and Tb3+ present different optical properties for they are sensitive to the local environment. In addition, the deduced lifetime of Tb3+5D4→7F5 transition decreases in the same system samples with the annealing temperature increasing. The deduced lifetime of Tb3+5D4→7F5 also decreases with the increase of the KF concentration in the KF system samples. [ABSTRACT FROM AUTHOR]
ISSN:13861425
DOI:10.1016/j.saa.2014.06.050