Preparation and cathodoluminescence characteristics of rare earth activated BaAl2O4 phosphors

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dc.contributor.authorBenourdja S.
dc.contributor.authorKaynar Ü.H.
dc.contributor.authorAyvacikli M.
dc.contributor.authorKarabulut Y.
dc.contributor.authorGuinea J.G.
dc.contributor.authorCanimoglu A.
dc.contributor.authorChahed L.
dc.contributor.authorCan N.
dc.date.accessioned2024-07-22T08:09:39Z
dc.date.available2024-07-22T08:09:39Z
dc.date.issued2018
dc.description.abstractUndoped and Pr, Sm and Tb activated BaAl2O4 phosphors have been synthesized by solid state reaction method and combustion method. The structure and morphological observation of the phosphor samples were monitored by X-ray powder diffraction (XRD) and environmental scanning electron microscope (ESEM) coupled to an energy dispersive X-ray spectrometer (EDS). The all diffraction peaks are well assigned to standard data card (PDF♯17–306). Emission properties of the samples were explored using light emission induced by an electron beam (i.e cathodoluminescence, CL) at room temperature (RT). Undoped BaAl2O4 sample exhibits a broad defect emission from 300 to 500 nm from the aluminate defect centres. CL spectra recorded at room temperature display that the as-prepared BaAl2O4:Ln (Ln=Pr, Sm and Tb) phosphors exhibit different luminescence colors coming from different rare earth activator ions. The transition 4G5/2 → 6H7/2 located at 606 and 610 nm for Sm3+ can occur as hypersensitive transition having the selection rule ΔJ = ± 1. For the Tb3+ doped samples, they exhibit D45 green line emissions. The proposed luminescent mechanisms of all doped rare earth ions are also discussed. © 2018 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.apradiso.2018.04.023
dc.identifier.issn09698043
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/14899
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectAluminum compounds
dc.subjectCathodoluminescence
dc.subjectDefects
dc.subjectDiffraction
dc.subjectMetal ions
dc.subjectPhosphors
dc.subjectPraseodymium compounds
dc.subjectRare earths
dc.subjectSamarium
dc.subjectScanning electron microscopy
dc.subjectSodium Aluminate
dc.subjectSolid state reactions
dc.subjectSpectrometers
dc.subjectX ray powder diffraction
dc.subjectX ray spectrometers
dc.subjectX rays
dc.subjectbarium aluminate
dc.subjectbarium derivative
dc.subjectlanthanide
dc.subjectunclassified drug
dc.subjectBaAl2O4
dc.subjectEnergy dispersive x-ray spectrometers
dc.subjectEnvironmental scanning electron microscopes
dc.subjectHypersensitive transitions
dc.subjectLuminescent mechanism
dc.subjectMorphological observations
dc.subjectRare-earth activators
dc.subjectSolid state reaction method
dc.subjectArticle
dc.subjectcathodoluminescence
dc.subjectcontrolled study
dc.subjectelectron beam
dc.subjectenergy dispersive X ray spectroscopy
dc.subjectenvironmental scanning electron microscopy
dc.subjectluminescence
dc.subjectpriority journal
dc.subjectroom temperature
dc.subjectscanning electron microscopy
dc.subjectstoichiometry
dc.subjectsynthesis
dc.subjectX ray powder diffraction
dc.subjectBarium compounds
dc.titlePreparation and cathodoluminescence characteristics of rare earth activated BaAl2O4 phosphors
dc.typeArticle

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