期刊
OPTIK
卷 127, 期 5, 页码 2715-2719出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2015.11.195
关键词
Sr4La(PO4)(3)O:Eu2+; Phosphors; White LEDs; Luminescence
类别
资金
- National Natural Science Foundation of China [61405185, 51402077, 51272243, 61370049]
- Zhejiang Provincial Natural Science Foundation of China [LR14A040002, LQ13E020003]
A novel blue-emitting phosphor, Eu2+-activated Sr4La(PO4)(3)O phosphor was synthesized by conventional solid-state reaction method. This phosphor can be effectively excited by near-UV light in the range of 250-420nm, which matches well with the emission of near ultraviolet LEDs. Under the excitation of 371 nm, the Sr4La(PO4)(3)O:0.05Eu(2+) phosphor shows strong blue emission with the peak at 444nm. The fluorescence decay curves the phosphor was discussed to verify the different emission center of Eu2+ ions. The critical Eu2+ quenching concentration (QC) mechanism was verified to be the dipole-dipole interaction. The temperature-dependent luminescence properties was investigated in detail. The luminescence characteristics indicates that this phosphor is a promising blue-emitting phosphor for white light emitting diodes. (C) 2015 Elsevier GmbH. All rights reserved.
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