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Optical properties of B2O3–CaF2 glass-ceramics doped with silver nanoparticles and praseodymium ions

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dc.contributor.authorNaranjo, Luz Patricia
dc.contributor.authorOliveira, Nathalia
dc.contributor.authorKassab, Luciana
dc.contributor.authorDe Araujo, Cid B.
dc.date.accessioned2021-11-12T21:54:44Z
dc.date.available2021-11-12T21:54:44Z
dc.date.issued2021-10-01
dc.description.abstractWe report on the synthesis and optical experiments with borate glass-ceramics (B2O3–CaF2 glass enclosing CaF2 nanocrystals), either undoped or doped with praseodymium ions (Pr3+) and containing silver nanoparticles (Ag-NPs). The techniques of transmission electron microscopy, X-rays diffraction, linear optical absorption, and photoluminescence (PL), were used to characterize the samples prepared. The glass samples, prepared by using the diffusion method, were heat-treated for nucleation of CaF2 nanocrystals (CaF2–NCs) with cubic structure and dimensions of ~20 nm, and Ag-NPs (with sizes between ~2 and ~50 nm). Optical absorption and PL experiments were performed. The glass-ceramic with Ag-NPs, but without Pr3+, exhibited tenfold enhancement (~1000%) of the blue PL from the CaF2–NCs, in comparison with the samples without Ag-NPs. In the samples with Pr3+ the presence of Ag-NPs induced small enhancement of the absorption spectra in the blue region [Pr3+ transitions: 3H4→3PJ (J = 0, 1, 2), 1I6] and 75% increase of the emitted intensity in the red region (Pr3+ transitions: 1D2→3H4). On the other hand, the CaF2–NCs luminescence was totally quenched due to the presence of Pr3+. This effect was attributed to resonant energy-transfer from the CaF2–NCs to Pr3+. The phenomena observed in the experiments were understood considering the contributions of the local electric field in the vicinities of the Ag-NPs and processes of energy-transfer among the CaF2–NCs, Ag-NPs and Pr3+.es_CO
dc.description.sponsorshipUniversidad de Ibaguées_CO
dc.identifier.citationNaranjo, L. P., Oliveira, N. T. C., Kassab, L. R. P., & de Araújo, C. B. (2021). Optical properties of B2O3–CaF2 glass-ceramics doped with silver nanoparticles and praseodymium ions. Journal of Luminescence, 238 doi:10.1016/j.jlumin.2021.118225es_CO
dc.identifier.issn0022-2313
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0022231321003410
dc.language.isoenes_CO
dc.publisherJournal of Luminescencees_CO
dc.subjectPr3+ionses_CO
dc.subjectSilver nanoparticleses_CO
dc.subjectCaF2 nanocrystalses_CO
dc.subjectB2O3–CaF2 glasseses_CO
dc.subjectBorate glass-ceramicses_CO
dc.titleOptical properties of B2O3–CaF2 glass-ceramics doped with silver nanoparticles and praseodymium ionses_CO
dc.typeArticlees_CO
dspace.entity.typePublication
eperson.emailpatricia.naranjo@unibague.edu.coes_CO
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