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dc.contributor.authorde Vicente, F. S. [UNESP]
dc.contributor.authorFreddi, P. [UNESP]
dc.contributor.authorOtuka, A. J.G.
dc.contributor.authorMendonça, C. R.
dc.contributor.authorBrito, H. F.
dc.contributor.authorNunes, L. A.O.
dc.contributor.authorVollet, D. R. [UNESP]
dc.contributor.authorDonatti, D. A. [UNESP]
dc.date.accessioned2018-12-11T17:17:43Z
dc.date.available2018-12-11T17:17:43Z
dc.date.issued2018-05-01
dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2017.12.048
dc.identifier.citationJournal of Luminescence, v. 197, p. 370-375.
dc.identifier.issn0022-2313
dc.identifier.urihttp://hdl.handle.net/11449/175824
dc.description.abstractIn this work the photoluminescence study and energy transfer from Tb3+ to Eu3+–β–diketonate complexes incorporated into organic/Silica hybrid films derived from 3–glycidoxypropyltrimethoxysilane (GPTMS) and tetraethylorthosilicate (TEOS) alkoxysilanes were investigated. Highly homogeneous and transparent films of Ln3+–doped GPTMS/TEOS–derived organic/silica hybrids were obtained from the organic/silica sols prepared by sol–gel. Tb3+:Eu3+–doped GPTMS/TEOS–derived films showed very intense luminescence when excited with UV light. Films co–doped with Tb3+ concentration fixed at 40.0×1018 ions/cm3 and Eu3+ concentrations of 0, 0.03, 0.05, 0.1, 0.3, 0.5, 1.0, 1.5, and 2.0×1018 ions/cm3 were studied. The films presented characteristic transitions 5D4–7F6-3 of Tb3+ ions and 5D0–7F0–4 of Eu3+ ions measured on the visible spectrum region. Energy transfer from Terbium to Europium was studied through emission decay time measurements of 5D4–7F5 transition of Tb3+ (547 nm) which showed an accentuated decrease (from 1329 to 55 µs) due to the co–doping with Eu3+ ions concentrations varied from 0.03 to 1.5×1018 ions/cm3. Energy transfer rate (WET) of 17.4×103 s−1 and relative energy transfer efficiency (ηT) of 96% were observed for films samples co–doped with 40×1018 ions/cm3 of Tb3+ and 1.5×1018 ions/cm3 of Eu3+. Due to the variation in WET and ηT from Tb3+ to Eu3+, the intensity ratios of Tb3+ band at 547 nm (5D4–7F5) and Eu3+ band at 617 nm (5D0–7F2) vary remarkably making the co–doped film samples exhibit different luminescence colors varying from green to orange and red which can be tuned by the Tb3+/Eu3+ ratio incorporated into the samples.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.format.extent370-375
dc.language.isoeng
dc.relation.ispartofJournal of Luminescence
dc.sourceScopus
dc.titlePhotoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid filmsen
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.description.affiliationDepartamento de Física Universidade Estadual Paulista (Unesp) IGCE
dc.description.affiliationInstituto de Física de São Carlos Universidade de São Paulo
dc.description.affiliationInstituto de Química Departamento de Química Fundamental Universidade de São Paulo
dc.description.affiliationUnespDepartamento de Física Universidade Estadual Paulista (Unesp) IGCE
dc.identifier.doi10.1016/j.jlumin.2017.12.048
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdFAPESP: #2016/20094-8
dc.identifier.scopus2-s2.0-85041471459
dc.identifier.file2-s2.0-85041471459.pdf
dc.relation.ispartofsjr0,694
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