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Energy transfer efficiency in YF3 nanocrystals: Quantifying the Yb31 to Tm31 infrared dynamics

AutorQuintanilla, Marta; Núñez, Nuria O. ; Cantelar, Eugenio; Ocaña, Manuel ; Cussó, Fernando
Fecha de publicación2013
EditorAmerican Institute of Physics
CitaciónJournal of Applied Physics 113, 174308 (2013);
Resumenefficiency in YF3:Yb3þ/Tm3þ nanocrystals through the study of Yb3þ 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 Yb3þ ! Yb3þ migration and the enhanced surface/volume ratio of the nanoparticles. On the other hand, Yb3þ ! Tm3þ 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 Yb3þ lifetime dependence with Yb3þ and Tm3þ concentration is proposed, considering both the effects produced by migration between Yb3þ ions and energy transfer from Yb3þ to Tm3þ ions.
Versión del editorhttp://dx.doi.org/10.1063/1.4803540
URIhttp://hdl.handle.net/10261/96039
DOI10.1063/1.4803540
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