期刊
CERAMICS INTERNATIONAL
卷 44, 期 13, 页码 15072-15078出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.05.140
关键词
Optical properties; Spectroscopy; Apatite; Energy transfer
资金
- Natural Science Foundation of Jiangxi Province [20161BAB216124]
- Educational Commission of Jiangxi Province [GJJ150632]
- Foundation of Natural Science Funds for Distinguished Young Scholar of Jiangxi Province [20171BCB23064]
- Science and Technology Program of Ganzhou city [[2017]179]
- Program of Qingjiang Excellent Young Talents of Jiangxi University of Science and Technology
The investigation on single phase multi-color phosphors is highly meaningful for near-ultraviolet chip based white light emitting diodes. In this work, a series of Eu2+ and Tb3+ singly doped and Eu2+/Tb3+ codoped Sr-5(PO4)(3)CI phosphors were synthesized via a high-temperature solid state reaction method. The luminescence spectra and decay curves of Eu 2+ and Tb3+ singly doped samples were discussed, the optimal doping concentrations were determined. Thanks to the spectra overlap between Eu2+ and Tb3+, nonradiative energy transfer from Eu2+ to Tb3+ was investigated. It is found electric dipole-dipole interaction played the main role for the energy transfer in codoped samples, the highest energy transfer efficiency was calculated to be 60.98%. Tunable emissions are observed for codoped samples by adjusting doping concentration. The thermal quenching properties were discussed and the activation energy (Delta E) was estimated in the present work.
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