荧光粉
色度
材料科学
光致发光
兴奋剂
离子
分析化学(期刊)
发光二极管
激发态
发光
结晶度
发射强度
光电子学
光学
原子物理学
化学
物理
有机化学
色谱法
复合材料
作者
Qiyun Tang,Tao Yang,Bin Guo,Biyou Peng,Haifeng Huang,Jinqing Ao
出处
期刊:Optik
[Elsevier]
日期:2020-12-01
卷期号:224: 165770-165770
被引量:10
标识
DOI:10.1016/j.ijleo.2020.165770
摘要
In this paper, a novel red-emitting material based on Eu3+ ion activated Sr5Nb4O15 was synthesized via a solid-state reaction method. The XRD patterns indicated that the sample, heated at 1300℃ for 6 h, could obtain pure phase with high crystallinity. The phosphors displayed irregular shapes with an averages diameter of approximately 0.66 μm. Excited upon 393 nm, the phosphors exhibited bright red emission peak at 613 nm, being assigned to the electric dipole 5D0-7F2transition of Eu3+ ions. In addition, the effect of Eu3+ doping concentration on the emission intensity was investigated in detail. The optimal doping concentration for the best PL performance was experimentally determined to be 15 mol%, beyond which the concentration quenching behavior occurred. The critical distance was calculated to be about 16 Å, revealing that the process of energy transfer between Eu3+ ions in Sr5Nb4O15 host was dominated by multipolar interaction. The chromaticity coordinates of the Sr4.85Nb4O15: 0.15Eu3+ phosphor were calculated to be (0.6354, 0.3642), closing to the standard NTSC values (0.67, 0.33). Thus, the Sr5Nb4O15: Eu3+ red phosphors could be potential candidates for the application in solid-state White LEDs, combined with near ultraviolet chip.
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