Excitation mechanisms and effects of dopant concentration in Gd2O2S : Tb3+ phosphor

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:20:03Z
dc.date.accessioned2022-10-05T15:19:36Z
dc.date.available2014-05-20T14:20:03Z
dc.date.available2022-10-05T15:19:36Z
dc.date.created2014-05-20T14:20:03Z
dc.date.issued2008-07-01
dc.identifierJournal of Luminescence. Amsterdam: Elsevier B.V., v. 128, n. 7, p. 1165-1168, 2008.
dc.identifier0022-2313
dc.identifierhttp://hdl.handle.net/11449/26018
dc.identifier10.1016/j.jlumin.2007.11.095
dc.identifierWOS:000255568900011
dc.identifier4284809342546287
dc.identifier2034352556339501
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3899056
dc.description.abstractGadolinium oxysulfide powders doped with different Tb3+ concentrations were prepared from sulfur vaporization on rare earths' basic carbonate precursors. Single-phase Gd2O2S samples were obtained, with Tb3+ doping up to 9 at%. The study of the excitation mechanisms revealed that the Tb3+ emission might occur after the direct Tb3+ excitation either by energy transfer from Gd3+ or from the phosphor host. The characteristic terbium emission lines were observed, resulting from the radiative decay from D-5(3) or D-5(4), to F-7(j) levels. The cross-relaxation phenomenon was observed and its effects on the materials emission color were discussed based on the CIE diagram. By using time-resolved spectroscopy, D-5(3) -> F-7(J) and D-5(4) -> F-7(J) transitions were separated. (c) 2007 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationJournal of Luminescence
dc.relation2.732
dc.relation0,694
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectscintillator
dc.subjectluminescence
dc.subjectcross relaxation
dc.subjectemission tuning
dc.titleExcitation mechanisms and effects of dopant concentration in Gd2O2S : Tb3+ phosphor
dc.typeArtigo


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