期刊
JOURNAL OF LUMINESCENCE
卷 172, 期 -, 页码 191-196出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2015.12.013
关键词
Apatite; Structure; Phosphor; Photoluminescence
类别
资金
- National Natural Science Foundations of China [41172053]
A series of blue-emitting La5.90-xBa4+x(SiO4)(6-x)(PO4)(x)F-2:0.10Ce(3+) (x=0, 1, 2, and 3) phosphors with apatite structure were synthesized by a solid-state reaction. The crystal structure and the photoluminescence properties were investigated in detail. The crystallographic occupancy of Ce3+ in La2.90Ce0.10Ba7(SiO4)(3)(PO4)(3)F-2 and La5.90Ce0.10Ba4(SiO4)(6)F-2 were studied based on Rietveld refinements results and the crystal chemistry rules. La5.90-xBa4+x(SiO4)(6-x)(PO4)(x)F-2:0.10Ce(3+) exhibited strong blue light emission in the range of 407-414 nm with high thermal stability upon excitation at 276 nm. Besides, the activation energy E of La5.90Ce0.10Ba4(SiO4)(6)F-2 and La2.90Ce0.10Ba7(SiO4)(3)(PO4)(3)F-2 phosphors were calculated to be 0.152 and 0.177 eV. These results suggest that La5.90-xBa4+x(SiO4)(6-x)(PO4)(x)F-2:0.10Ce(3+) is a potential blue phosphor candidate for near-UV-pumped w-LEDs. (C) 2015 Elsevier B.V. All rights reserved.
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