Publicação:
Nanostructured ZnS:Cu phosphor: Correlation between photoluminescence properties and local structure

dc.contributor.authorCurcio, Ana Laura [UNESP]
dc.contributor.authorda Silva, Luís Fernando
dc.contributor.authorBernardi, Maria Inês Basso
dc.contributor.authorLongo, Elson
dc.contributor.authorMesquita, Alexandre [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2019-10-06T15:22:02Z
dc.date.available2019-10-06T15:22:02Z
dc.date.issued2019-02-01
dc.description.abstractZinc sulfide (ZnS) is a II–VI inorganic semiconductor material and has received remarkable attention because of fundamental physical properties, versatility, nontoxicity, chemical stability and has been widely applied to make numerous optical devices as phosphor material. As a wide band gap semiconductor, ZnS can easily host different metal ions as luminescent center to improve or modify its structural and optical performances such as Cu atoms. In this paper, ZnS:Cu nanoparticles were synthesized by solvothermal method and the photoluminescence and the structural at long- and local-range properties were characterized. According to X-ray diffraction results, ZnS sample crystallizes with the cubic zinc blende structure (F-43m space group) without spurious phases. Images from transmission electron microscope depict the morphology of ZnS particles as round shape and average size value lower than 5 nm. Theoretical and experimental X-ray absorption near edge structure (XANES) spectra at Zn K-edge suggest the incorporation of Cu atoms into the ZnS host and indicate the occurrence of Zn and S vacancies, which are confirmed by extended X-ray absorption fine structure (EXAFS) fit results. These native defects are related to a red-shift observed in the peak emission of photoluminescence (PL) spectrum for ZnS sample, which is centered at ~ 504 nm. An emission in orange-red region is observed as Cu is incorporated in the ZnS host matrix that is attributed to the transition from the 4T1 level to the 6A1 level. Moreover, the intensity of the emissions due to zinc vacancies and interstitial zinc in the deconvoluted PL spectrum is in accordance with results determined in X-ray absorption spectroscopy characterization.en
dc.description.affiliationInstitute of Geosciences and Exact Sciences São Paulo State University Unesp
dc.description.affiliationDepartment of Physics Federal University of São Carlos UFSCar
dc.description.affiliationSão Carlos Institute of Physics University of São Paulo USP
dc.description.affiliationLIEC Department of Chemistry Federal University of São Carlos UFSCar
dc.description.affiliationUnespInstitute of Geosciences and Exact Sciences São Paulo State University Unesp
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2013/07296-2
dc.description.sponsorshipIdFAPESP: 2013/12993-4
dc.description.sponsorshipIdFAPESP: 2017/12437-5
dc.description.sponsorshipIdCNPq: 473568/2013-6
dc.format.extent292-297
dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2018.10.073
dc.identifier.citationJournal of Luminescence, v. 206, p. 292-297.
dc.identifier.doi10.1016/j.jlumin.2018.10.073
dc.identifier.issn0022-2313
dc.identifier.scopus2-s2.0-85055282525
dc.identifier.urihttp://hdl.handle.net/11449/186988
dc.language.isoeng
dc.relation.ispartofJournal of Luminescence
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleNanostructured ZnS:Cu phosphor: Correlation between photoluminescence properties and local structureen
dc.typeArtigo
dspace.entity.typePublication
unesp.author.lattes2835864951583089[5]
unesp.author.orcid0000-0001-8524-0959[5]

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