Efficient sensitization of Tb3+ emission by Dy3+ in CaMoO4 phosphors: Energy transfer, tunable emission and optical thermometry

Dy3+/Tb3+ codoped CaMoO4 phosphors were synthesized by a simple sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. The energy transfer process of Dy3+→Tb3+ was confirmed by excitation and emission spectra and luminescen...

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Bibliographic Details
Published in:Ceramics international 2016-04, Vol.42 (5), p.6094-6099
Main Authors: Li, Xinyue, Dong, Mingbin, Hu, Fangfang, Qin, Yanguang, Zhao, Lu, Wei, Xiaotao, Chen, Yonghu, Duan, Changkui, Yin, Min
Format: Article
Language:English
Subjects:
CaMoO4 phosphors
Energy transfer process
Optical thermometry
Tunable emission
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Summary:Dy3+/Tb3+ codoped CaMoO4 phosphors were synthesized by a simple sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. The energy transfer process of Dy3+→Tb3+ was confirmed by excitation and emission spectra and luminescence decay curves, and the energy transfer efficiency was also estimated. The results verified that the efficient emission of Tb3+ was sensitized by Dy3+ under the excitation of 354nm, realizing tunable emission in CaMoO4 phosphors. Furthermore, optical thermometry was achieved by the fluorescence intensity ratio between Tb3+: 5D4→7F5 (~546nm) and Dy3+: 4F9/2→6H13/2 (~575nm). It is expected that the investigated CaMoO4 nanograins doped with Dy3+/Tb3+ have prospective applications in display technology and optical thermometry.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.12.167