Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 12, Pages 13648-13653Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.05.160
Keywords
Li3Ba2Y3(WO4)(8); Concentration quenching; Optical transition; Thermal stability
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Funding
- National Natural Science Foundation of China [51302182]
- Natural Science Foundation of Shanxi Province [2013021004-2, 2014011017-3]
- Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi
- Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi
- school fund of Taiyuan University of Technology [tyut-rc201361a, tyut-rc201497a, 1205-04020102]
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A series of Li3Ba2Y3-x(WO4)(8):xEu(3+) (x=0.1, 1, 1.5, 2 and 2.8) phosphors were synthesized by a high temperature solid-state reaction method. Under the excitation of near ultraviolet (NUV) light, the as prepared phosphor exhibits intense red luminescence originating from the characteristic transitions of Eu3+ ions, which is 1.8 times as strong as the commercial Y2O2S:Eu3+ phosphor. The optimal doping concentration of Eu3+ ions here is confirmed as x=1.5. The electric dipole-quadrupole (D-Q) interaction is deduced to be responsible for concentration quenching of Eu3+ ions in the L13Ba2Y3(WO4)(8) Phosphor. The analysis of optical transition and Huang-Rhys factor reveals a weak electron-phonon coupling interaction. The temperature-dependent emission spectra also indicate that the as-prepared Li3Ba2Y3(WO4)(8):Eu3+ phosphor has better thermal stability than that of the commercial Y2O2S:Eu3+ phosphor. Therefore, our results show that the as-prepared Li3Ba2Y3(WO4)(8):Eu3+ phosphor is a promising candidate as red emitting component for white light emitting diodes (LEDs). (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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