GUENÉ-GIRARD, Simon; COURTOIS, Julia; DUSSAUZE, Marc; HEINTZ, Jean-Marc; FARGUES, Alexandre; ROGER, Jérôme; NALIN, Marcelo; CARDINAL, Thierry; JUBERA, Veronique

doi:10.1016/j.materresbull.2021.111451

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GUENÉ-GIRARD, Simon
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

COURTOIS, Julia
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DUSSAUZE, Marc
Institut des Sciences Moléculaires [ISM]

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Article de revue

Ce document a été publié dans

Materials Research Bulletin. 2021, vol. 143, p. 111451

Elsevier

Résumé en anglais

Ho3+-doped YNbO4 and Y3NbO7 phosphors were synthesised via a co-precipitation synthesis route. Structural characterisation and spectroscopic properties were performed as a function of the Ho3+ concentration. The Rietveld type-refinement confirms the stabilisation of the pure monoclinic Fergusonite YNbO4 phase at the highest temperatures, but the quadratic phase is stabilised for the lowest temperature, whereas a pure cubic fluorite Y3NbO7 phase was observed for all of the heat treatments. Raman and infrared spectroscopies were used to compare the cation-oxygen vibrational modes. Emission spectra and up-conversion processes were obtained under excitation at 445 and 975 nm respectively. For a similar Ho3+ content, the energy transfers observed show differences between the two crystalline compounds that are related to a stronger interaction between the holmium cations in the fluorite host lattice.< Réduire

Mots clés en anglais

energy transfer

rare earth

niobate

luminescence

Raman

DOI

http://dx.doi.org/10.1016/j.materresbull.2021.111451

Project ANR

Céramiques luminescentes de forte efficacité LASER dans la fenêtre 1.7-2.7 microns - ANR-20-CE08-0016

Origine

Importé de hal