Tm3+ doped barium molybdate: A potential long-lasting blue phosphor

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dc.citation.volume735
dc.contributor.authorde Azevedo Marques, Ana Paula [UNIFESP]
dc.contributor.authorKunzel, Roseli [UNIFESP]
dc.contributor.authorUmisedo, Nancy K.
dc.contributor.authorLatini, Renato Mazin [UNIFESP]
dc.contributor.authorYoshimura, Elizabeth Mateus
dc.contributor.authorOkuno, Emico
dc.coverageLausanne
dc.date.accessioned2020-07-08T13:09:38Z
dc.date.available2020-07-08T13:09:38Z
dc.date.issued2018
dc.description.abstractMolybdates have applications in various fields such as phosphors, optical fibers, scintillators, magnets, sensors and catalysts. Thulium ion is an excellent blue activator and plays an important role in the design of persistent luminescent materials. This paper reports the investigation of the structural and luminescent properties of Barium Thulium Molybdate (Ba1-xTmx)MoO4 microcrystals (with x = 0, 0.01 or 0.03). The scheelite-type crystalline structure was identified from XRD and Raman studies. Under ultraviolet (359 nm) excitation, photoluminescence (PL) spectra present the characteristic emission bands at 453 nm and 545 nm which are due to the D-1(2) -> F-3(4) and D-1(2) -> H-3(4,5) transitions, respectively, from Tm3+ ions. Thermoluminescence (TL) measurements were performed with powdered samples previously irradiated with beta radiation. The depth of traps, associated with trap levels located inside the band-gap, was determined from TL data using different methods of glow curve analysis. The kinetic parameters, determined from thermoluminescent glow curves, provide evidence about a possible persistent luminescence emission from the (Ba0.97Tm0.03)MoO4 sample. This is a potential blue-light or ultraviolet long-lasting phosphor, with a trapping level lifetime, at room-temperature (300 K), of about 6 days. (C) 2017 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Fed Sao Paulo, UNIFESP, Dept Quim, R Sao Nicolau 210 Ctr, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo, UNIFESP, Dept Fis, R Sao Nicolau 210 Ctr, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Inst Fis, Cidade Univ, BR-09913030 Sao Paulo, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, UNIFESP, Dept Quim, R Sao Nicolau 210 Ctr, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, UNIFESP, Dept Fis, R Sao Nicolau 210 Ctr, BR-09913030 Diadema, SP, Brazi
dc.description.sourceWeb of Science
dc.description.sponsorshipSao Paulo Research Foundation (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
dc.description.sponsorshipIDFAPESP: 2016/20578-5, 2013/07437-5, 2010/16437-0, 2010/06816-4
dc.format.extent707-717
dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2017.10.225
dc.identifier.citationJournal Of Alloys And Compounds. Lausanne, v. 735, p. 707-717, 2018.
dc.identifier.doi10.1016/j.jallcom.2017.10.225
dc.identifier.issn0925-8388
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/54112
dc.identifier.wosWOS:000418518600083
dc.language.isoeng
dc.publisherElsevier Science Sa
dc.relation.ispartofJournal Of Alloys And Compounds
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectCeramicsen
dc.subjectLuminescenceen
dc.subjectMicrowaveen
dc.subjectRare earth alloys and compoundsen
dc.subjectOptical propertiesen
dc.titleTm3+ doped barium molybdate: A potential long-lasting blue phosphoren
dc.typeinfo:eu-repo/semantics/article
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