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Nanocrystalline lanthanide tetraphosphates: Energy transfer processes in samples co-doped with Pr3+/Yb3+ and Tm3+/Yb3+
被引:7
|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:
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.
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页码:159 / 165
页数:7
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