期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 202, 期 -, 页码 352-358出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2018.05.061
关键词
Phosphor; Luminescence; Borate; Energy transfer
类别
资金
- National Natural Science Foundation of China [51562011]
- Natural Science Foundation of Jiangxi Province of China [20151BAB212003]
- PhD Startup Foundation of Jinggangshan University [JZB15011]
Polycrystalline Ba3La2(BO3)(4):Ce3+,Dy3+ sub-micrometer-sized phosphors were synthesized by solid-state reaction under a weak reductive atmosphere. The structure, static and time-resolved photoluminescence are investigated. Under the near-ultraviolet excitation, the Ba3La2(BO3)(4):Dy3+ phosphors emit white light with three intense emission bands centered at 483, 575, and 665 nm. The efficient energy transfer from Ce3+ to Dy3+ in Ba3La2(BO3)(4) phosphor was found by excitation/emission spectra and decay time measurements, and the resonant type was demonstrated by a dipole-dipole mechanism. A tunable emission hue from blue (0.18, 0.20) to blue-white (0.26, 0.29) and eventually to white (032, 0.33) was obtained in Ba3La2(BO3)(4):Ce3+,Dy3+ phosphors. Owing to the broad UV excitation band, indicating that Ba3La2(BO3)(4):Ce3+,Dy3+ phosphors can be considered as a potential candidate for ultraviolet-based white light-emitting diodes. (C) 2018 Elsevier B.V. All rights reserved.
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