Ca8NaY(PO4)6F2:Eu2+,Mn2+: a potential color-tunable phosphor for white LEDs applications

被引：2
作者：
Zhang Fen [1 ,2 ]
Tang Wanjun [1 ,2 ]
机构：
[1] South Cent Univ Nationalities, State Ethn Affairs Commiss, Key Lab Catalysis & Mat Sci, Wuhan 430074, Peoples R China
[2] South Cent Univ Nationalities, Coll Chem & Mat Sci, Wuhan 430074, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2015年 / 118卷 / 03期
关键词：
ENERGY-TRANSFER; SINGLE-PHASE; LIGHT; LUMINESCENCE; MN2+; CONVERSION; EFFICIENT; CE3+; SR;
D O I：
10.1007/s00339-014-8840-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Eu2+- and/or Mn2+-activated Ca8NaY(PO4)(6)F-2 phosphors have been prepared via a combustion-assisted synthesis route. The powder X-ray diffraction measurement revealed that Ca8NaY(PO4)(6)F-2 crystallized in a hexagonal crystal system with the space group P6(3)/m (176). The photoluminescence spectrum of the Eu2+ single-doped phosphor shows a broad blue emission band peaking at 451 nm under the excitation of UV irradiation. The Eu2+-/Mn2+-codoped phosphors show a blue emission band and an orange emission band, and the corresponding CIE coordinates intuitively indicate the tunable colors from blue to yellow area. The energy transfer from the Eu2+ to Mn2+ ions is demonstrated to be a quadrupole-quadrupole mechanism in terms of the experimental results and analysis of PL spectra and decay curves of the phosphors. The developed phosphors can be efficiently excited in the UV region and exhibit a tunable white-light emission, making them attractive as single-component white-light-emitting conversion phosphors for UV-based white LEDs.
引用
收藏
页码：945 / 951
页数：7
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