In this work, we report on the determination of the infrared Yb3+ → Tm3+ energy transfer efficiency in YF3:Yb3+/Tm3+ nanocrystals through the study of Yb3+ dynamics. The obtained results are compared to those previously reported in macrocrystals to analyze possible changes related to size reduction. Luminescence lifetimes are much shorter in the nanoparticles than in bulk samples, a behavior that can be related to Yb3+ → Yb3+ migration and the enhanced surface/volume ratio of the nanoparticles. On the other hand, Yb3+ → Tm3+ energy transfer macroparameter remains unaltered, demonstrating that spectroscopic intrinsic parameters such as radiative and non-radiative probabilities are not affected by size reduction. Finally, a formula that describes Yb3+ lifetime dependence with Yb3+ and Tm3+ concentration is proposed, considering both the effects produced by migration between Yb3+ ions and energy transfer from Yb3+ to Tm3+ ions.
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7 May 2013
Research Article|
May 07 2013
Energy transfer efficiency in YF3 nanocrystals: Quantifying the Yb3+ to Tm3+ infrared dynamics
Marta Quintanilla;
Marta Quintanilla
a)
1
Universidad Autónoma de Madrid, Departamento de Física de Materiales (C-IV)
, Avda. Francisco Tomás y Valiente 7, 28049 Madrid, Spain
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Nuria O. Núñez;
Nuria O. Núñez
2
Instituto de Ciencia de Materiales de Sevilla
, CSIC-US, Américo Vespucio 49, 41092 Isla de la Cartuja, Seville, Spain
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Eugenio Cantelar;
Eugenio Cantelar
1
Universidad Autónoma de Madrid, Departamento de Física de Materiales (C-IV)
, Avda. Francisco Tomás y Valiente 7, 28049 Madrid, Spain
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Manuel Ocaña;
Manuel Ocaña
2
Instituto de Ciencia de Materiales de Sevilla
, CSIC-US, Américo Vespucio 49, 41092 Isla de la Cartuja, Seville, Spain
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Fernando Cussó
Fernando Cussó
1
Universidad Autónoma de Madrid, Departamento de Física de Materiales (C-IV)
, Avda. Francisco Tomás y Valiente 7, 28049 Madrid, Spain
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J. Appl. Phys. 113, 174308 (2013)
Article history
Received:
November 08 2012
Accepted:
April 15 2013
Citation
Marta Quintanilla, Nuria O. Núñez, Eugenio Cantelar, Manuel Ocaña, Fernando Cussó; Energy transfer efficiency in YF3 nanocrystals: Quantifying the Yb3+ to Tm3+ infrared dynamics. J. Appl. Phys. 7 May 2013; 113 (17): 174308. https://doi.org/10.1063/1.4803540
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