期刊
JOURNAL OF LUMINESCENCE
卷 154, 期 -, 页码 246-250出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2014.04.041
关键词
Optical materials; Optical properties; Luminescence
类别
资金
- National Natural Science Foundation of China [51372105]
A series of Dy3+ doped Ca19Mg2(PO4)(14) phosphors were firstly synthesized by the solid-state reaction method. The phase purity and characteristic luminescent properties are investigated in detail by X-ray diffraction refinement, photoluminescence spectra and decay times measurement. Under 365 nm excitation, Ca19Mg2(PO4)(14):Dy3+ phosphor can exhibit intense warm white emission with CIE chromaticity coordinates (0.400, 0.452) and low correlated color temperature (3994 K). The optimal doping contents of Dy3+ in Ca19Mg2(PO4)(14) is determined to be 2%. The thermal quenching property of Ca19Mg2(PO4)(14):Dy3+ is also investigated and it remains 60% of the initial emission intensity even when the temperature increases to 230 T. The results show that Ca19Mg2(PO4)(14):Dy3+ can be a promising single phased white emitting phosphor for UV white LEDs. (C) 2014 Elsevier B.V. All rights reserved.
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