期刊
JOURNAL OF LUMINESCENCE
卷 132, 期 3, 页码 617-621出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2011.10.014
关键词
Optical material; Photoluminescence; Light-emitting diode
类别
资金
- National 973 Program of China [2009CB939903, 2007CB936704]
- NSF of China [1077517161076062, 51125006, 91122034, 50821004, 50902143]
- State Key Program for Basic Research of China [2010CB630703]
- Science and Technology Commission of Shanghai [10520706700, 0952nm06500, 10JC1415800]
A new red-emitting phosphor Ca9Lu(PO4)(7):Ce3+, Mn2+ has been synthesized by solid-state reaction, and its luminescence properties have been investigated. The broad red emission peaked at 645 nm of Mn2+ is greatly enhanced by the sensitizer Ce3+ due to efficient energy transfer from Ce3+ to Mn2+. The energy transfer was demonstrated to belong to a resonant type via a dipole-quadrupole mechanism. The critical distance for Ce3+ -> Mn2+ energy transfer was calculated to be 15.04 angstrom by concentration quenching method. Preliminary results indicate that the phosphor might be a promising red phosphor for UV-based white LEDs. (C) 2011 Elsevier B.V. All rights reserved.
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