Structural, photoluminescent properties and Judd-Ofelt analysis of Eu3+-activated CaF2 nanocubes

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Show simple item record Cantelar, Eugenio Sanz Garcia, Juan Antonio Sanz Martin, Adrian Muñoz Santiuste, Juan Enrique Cusso, Fernando 2022-08-05T11:35:00Z 2022-08-05T11:35:00Z 2020-01-15
dc.identifier.bibliographicCitation Cantelar, E., Sanz-García, J. A., Sanz-Martín, A., Muñoz Santiuste, J. E., & Cussó, F. (2020). Structural, photoluminescent properties and Judd-Ofelt analysis of Eu3+-activated CaF2 nanocubes. In Journal of Alloys and Compounds (Vol. 813, p. 152194). Elsevier BV.
dc.identifier.issn 0925-8388
dc.description.abstract Eu3+-doped CaF2 nanocubes with variable europium concentration, [Eu3+] = 0, 0.6, 1.3, 1.7, 2.2 and 5.4 mol%, have been synthesized by a direct precipitation route. It has been found that, within this concentration range, the nanoparticles present the fluoride-type crystalline structure and the characteristic cubic shape of CaF2 crystals. The nanoparticle size follows a log-normal distribution with a mean value decreasing with the Eu3+ content. Rietveld refinement has been performed to calculate the lattice parameter and crystallite size. Eu3+ concentration affects both parameters giving rise to an increase in the lattice parameter and a reduction of crystallite size. The luminescent properties of Eu3+ ions in these nanostructures have been investigated under CW and pulsed excitation. A Judd-Ofelt analysis, as function of the Eu3+ content, has been performed to determine the transition probabilities, radiative lifetimes and branching ratios of the 5D0 emitting level. It was found that and Judd-Ofelt intensity parameters are dependent on the doping level, showing an evolution that indicates a decrease in the Eu3+ site local symmetry with increasing Eu3+ concentration. Finally, it has been observed that the characteristic luminescence decay time of the 5D0 manifold is reduced with increasing Eu3+ concentration. This effect is partially due to an increase of radiative transition probability, associated with a reduction in the local symmetry of the lanthanide ions, and also to the occurrence of concentration quenching effects
dc.description.sponsorship This work has been partially supported by Ministerio de Economía y Competitividad and Ministerio de Ciencia, Innovación y Universidades under projects MAT2016-75716-2-2-R and RTI2018- 101020-B-I00.
dc.format.extent 9
dc.language.iso eng
dc.publisher Elsevier BV.
dc.rights © 2019 The Authors. Published by Elsevier B.V.
dc.rights Atribución 3.0 España
dc.subject.other Caf2 Nanoparticles
dc.subject.other Concentration Dependence
dc.subject.other Eu3+
dc.subject.other Judd-Ofelt
dc.subject.other Rietveld Refinement
dc.title Structural, photoluminescent properties and Judd-Ofelt analysis of Eu3+-activated CaF2 nanocubes
dc.type article
dc.subject.eciencia Física
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. RTI2018-101020-B-I00
dc.relation.projectID Gobierno de España. MAT2016-75716-2-2-R
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationlastpage 9
dc.identifier.publicationtitle Journal of Alloys and Compounds
dc.identifier.publicationvolume 813
dc.identifier.uxxi AR/0000025506
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades (España)
dc.affiliation.dpto UC3M. Departamento de Física
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Materiales avanzados para aplicaciones en energía solar
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