A new dual-emission phosphor Ca4Si2O7F2:Ce3+, Mn2+ with energy transfer for near-UV LEDs

被引：23
作者：
Lu, Wei [1 ,2 ]
Luo, Yongshi [1 ]
Hao, Zhendong [1 ]
Zhang, Xia [1 ]
Wang, Xiaojun [3 ]
Zhang, Jiahua [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] Georgia So Univ, Dept Phys, Statesboro, GA 30460 USA
来源：
MATERIALS LETTERS | 2012年 / 77卷
关键词：
Luminescence; Phosphors; Optical materials and properties; LIGHT-EMITTING DIODES;
D O I：
10.1016/j.matlet.2012.02.095
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ce3+ and Mn2+ co-doped Ca4Si2O7F2 phosphors have been synthesized by high temperature solid state reaction and their luminescence properties are investigated. The effect of Ce3+ concentration on the emission intensity of Ca4Si2O7F2: Ce3+ is studied, and the emission intensity reaches a maximum at 4% Ce3+. Energy transfer from Ce3+ to Mn2+ is observed. The emission spectra of the phosphors show a blue broad band at 460 nm of Ce3+ and a yellow band at 580 nm of Mn2+, originate from the allowed 5d -> 4f transition of the Ce3+ ion and the T-4(1g)((4)G) -> (6)A(1g)(S-6) transition of the Mn2+ ion, respectively. Results indicate that the varied emitted color from blue to yellow can be achieved by tuning the relative ratio of the Ce3+ to Mn2+ ions based on the principle of energy transfer. We have demonstrated that Ca4Si2O7F2: Ce3+, Mn2+ phosphors can be a promising candidate for a color-tunable phosphor applied in a near-UV White light emitting diodes. (C) 2012 Elsevier B.V. All rights reserved.
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页码：45 / 47
页数：3
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