期刊
DYES AND PIGMENTS
卷 139, 期 -, 页码 701-707出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2016.12.059
关键词
Phosphor; Luminescence; LED; Energy transfer
资金
- National Natural Science Foundation of China (NSFC) [51472234, 51672265, 51672266, 91433110]
- National Basic Research Program of China [2014CB643803]
- Natural Science Foundation of Jilin Province [20150520029JH]
- Joint Funds of the National Natural Science Foundation of China [U13012038]
- Special Research Fund (BOF) Ghent University-Posdoctoral fellowship at Ghent University
A series of novel blue-green emission phosphors BaLu6(Si2O7)(2)(Si3O10):Ce3+,Tb3+ (BLSO:Ce3+,Tb3+) were synthesized via the high-temperature solid-state reaction route. Many characterizations such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) were conducted to analyze the phase and structure of as prepared samples. Photoluminescence (PL) properties illustrated that Ce3+ singly doped BLSO can produce a broad band ranging from 365 to 550 nm upon UV excitation, which overlapped the excitation spectrum of Tb3+ monitored at 550 nm emission. Energy transfer phenomenon from Ce3+ to Tb3+ in this kind of phosphor was demonstrated from the variations of emission spectra and the decrease of Ce3+ fluorescent decay lifetime in Ce3+-Tb3+ co-doped BLSO, based on which the emission color can be tuned from bright blue to green upon UV excitation. The energy transfer mechanism from Ce3+ to Tb3+ was determined to be electric dipole-quadrupole interaction. Moreover, the temperature-dependent PL of representative BLSO:0.18Ce(3+),1.00Tb(3+) was supplied in this manuscript, which indicated the good thermal stability of this kind of phosphor. The results show that BLSO:Ce3+,Tb3+ phosphors can be as a potential candidate of blue-green component in phosphor-converted UV LEDs. (C) 2016 Elsevier Ltd. All rights reserved.
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