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Preparation, luminescence properties and electronic structure of RE (RE=Eu3+,Sm3+,Dy3+)-doped multi-color silico-phosphate Ca15(PO4)2(SiO4)6 phosphors
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jlumin.2020.117356
Xiaofang Xu , Jinxing Zhao , Hao Feng , Zichen Gao , Li Guan , Yong Yang , Fenghe Wang , Dawei Wang , Xu Li

Abstract To explore new white-light-emitting luminescent materials, a series of multi-color phosphors Ca15(PO4)2(SiO4)6:RE (RE = Eu3+,Sm3+,Dy3+) were successfully prepared by using high temperature solid-state reaction. The calculated electronic structure used by first-principles method predicts that the matrix belongs to a wide bandgap material, which is suitable to achieve the incorporation of various rare earth ions. Excited under near UV light, the phosphors exhibit red light emission with a main peak at 621 nm, orange-red light emission at 603 nm and white light emission with two peaks at 484 nm and 578 nm for Eu3+, Sm3+ and Dy3+ doped Ca15(PO4)2(SiO4)6, respectively. Specially, Ca15(PO4)2(SiO4)6 phosphor can achieve white light emission by doping single rare earth Dy3+ ions. The thermal stabilities of three doped phosphors were measured and their emission intensities maintained more than 88% at 150 °C, which indicates the silico-phosphate phosphors have an excellent thermal stability. The results illuminate that as-prepared Ca15(PO4)2(SiO4)6:RE (RE = Eu3+,Sm3+,Dy3+) phosphors not only achieve multi-color light emission, but also exhibit great potential application in the field of UV or blue based white light-emitting diodes.

中文翻译:

稀土(RE=Eu3+,Sm3+,Dy3+)掺杂多色磷酸硅Ca15(PO4)2(SiO4)6荧光粉的制备、发光性能和电子结构

摘要 为探索新型白光发光材料,利用高温固相反应成功制备了一系列多色荧光粉Ca15(PO4)2(SiO4)6:RE (RE = Eu3+,Sm3+,Dy3+)。 . 第一性原理方法计算出的电子结构预测该基体属于宽带隙材料,适合实现多种稀土离子的掺入。在近紫外光激发下,Eu3+、Sm3+ 和 Dy3+ 掺杂的 Ca15( PO4)2(SiO4)6。特别是Ca15(PO4)2(SiO4)6荧光粉通过掺杂单一的稀土Dy3+离子可以实现白光发射。测量了三种掺杂荧光粉的热稳定性,它们的发射强度在 150°C 时保持在 88% 以上,这表明硅磷酸盐荧光粉具有优异的热稳定性。结果表明,所制备的Ca15(PO4)2(SiO4)6:RE (RE = Eu3+,Sm3+,Dy3+)荧光粉不仅实现了多色发光,而且在紫外或蓝光领域也具有巨大的应用潜力。基于白光发光二极管。
更新日期:2020-10-01
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