Nanocrystalline lanthanide tetraphosphates: Energy transfer processes in samples co-doped with Pr3+/Yb3+ and Tm3+/Yb3+

被引：6
|
作者：
Lukowiak, Anna [1 ]
Stefanski, Mariusz [1 ]
Ferrari, Maurizio [2 ]
Strek, Wieslaw [1 ]
机构：
[1] PAS, Inst Low Temp & Struct Res, 2 Okolna St, PL-50950 Wroclaw, Poland
[2] IFN CNR CSMFO Lab, Via Alla Cascata 56-C Povo, I-38123 Trento, Italy
来源：
OPTICAL MATERIALS | 2017年 / 74卷
关键词：
Tetraphosphates; Rare earth ions; Photoluminescence; Downconversion; Upconversion; UP-CONVERSION LUMINESCENCE; CRYSTAL-STRUCTURE; GLASS-CERAMICS; EMISSION; YB3+; NANOPARTICLES; FLUORESCENCE; IONS; PR3+; ENHANCEMENT;
D O I：
10.1016/j.optmat.2017.03.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Photoluminescent properties of nanocrystalline powders of the LiLa(PO3)(4) system co-doped with Pr3+/Yb3+ or Tm3+/Yb3+ ions were reported. The powders were synthesized by precipitation method and annealed at 450 degrees C. Two series of the samples were prepared with 1 mol% of praseodymium or thulium ions and with various ytterbium content (from 2% up to 16%). Both the up- and downconversion energy transfers were studied, in particular, the spectra and kinetics of photoluminescence under blue (into Pr3+ or Tm3+ ions, respectively) and NIR (into Yb3+ ions) excitations. The possible mechanisms of energy migration were discussed. Higher ytterbium concentration resulted in higher energy transfer efficiencies for both tetraphosphate systems. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：159 / 165
页数：7
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