Governing of down-shifting processes in LiLaP4O12: Tb3+, Yb3+ for enhancement of its near-infrared emission

被引：2

作者：

Grzeszkiewicz, K. ^{[1
]}

Marciniak, L. ^{[1
]}

Hreniak, D. ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

来源：

JOURNAL OF RARE EARTHS | 2016年 / 34卷 / 08期

关键词：

downshifting; LiLaP4O12; Tb3+; Yb3+; rare earths; COOPERATIVE ENERGY-TRANSFER; LUMINESCENCE; LINDP4O12; GLASSES;

D O I：

10.1016/S1002-0721(16)60102-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Downshifting behavior of the Tb3+-Yb3+ co-doped nanocrystalline LiLaP4O12 powders synthesized by co-precipitation method was presented and discussed. The structural phase purity of obtained material was confirmed by X-ray diffraction (XRD) measurements. Strong enhancement of ytterbium F-2(5/2) -> F-2(7/2) emission intensity was observed with decreasing Tb3+ concentration under UV excitation. Dependence of efficiency of energy transfer between dopants on pumping wavelength was investigated due to better understanding of down-shifting mechanism. It was found that luminescence intensity of Yb3+ decreased above 10 mol.% dopant content, what was caused by concentration quenching. The power dependence measurements were carried out at 77 and 300 K. The resulting slopes had the same value of 1, what indicated the existence of linear down-shifting process, independent of the temperature.

引用

页码：833 / 836

页数：4

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