Photoluminescence investigations of Li 2SiO 3:Ln (Ln=Er 3+, Eu 3+, Dy 3+, Sm 3+) phosphors

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dc.contributor.authorSabikoglu I.
dc.contributor.authorAyvackl M.
dc.contributor.authorBergeron A.
dc.contributor.authorEge A.
dc.contributor.authorCan N.
dc.date.accessioned2024-07-22T08:19:32Z
dc.date.available2024-07-22T08:19:32Z
dc.date.issued2012
dc.description.abstractIn this study, we report a comprehensive structural and photoluminescence (PL) study on lithium metasilicate (Li 2SiO 3) phosphor ceramics doped with four rare earth (RE) ions. X-ray diffraction (XRD) patterns show a dominant phase, characteristic of the orthorhombic structure Li 2SiO 3 compound and the presence of dopants has no effect on the basic crystal structure of the material. The first excited state Er 3+ luminescence at 1.54 μm arises from a sharp atomic-like radiative transition between the 4I 13/2 state and the 4I 15/2 state (ground level) under a 532 nm line of an Ar ion laser excitation. Sm doped samples showed Sm 3+ emission characteristics corresponding to the some 4G 5/2→ 6H j (j=5/2,9/2,11/2) transitions indicating a strong crystal-field effect. PL spectra of Eu doped material exhibited peaks corresponding to the 5D 0→ 7F j (j=0,1,2,3 and 4) transitions under 405 nm excitation. The dominant red color emission at 612 nm from the hypersensitive ( 5D 0→ 7F 2) transition of Eu 3+ indicates the inversion antisymmetry crystal field around Eu 3+ ion, which is favorable to improve the red color purity. Dy doped samples showed the Dy 3+ emission characteristic due to the 4F 9/2→ 6H 13/2 transition. Their relative intensity ratios also suggested the presence of a symmetric environment around the metal ion. We suggest that lithium metasilicate has enough potential candidates to be a phosphor material. © 2012 Elsevier B.V.
dc.identifier.DOI-ID10.1016/j.jlumin.2012.02.008
dc.identifier.issn00222313
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17724
dc.language.isoEnglish
dc.subjectCrystal structure
dc.subjectDoping (additives)
dc.subjectErbium
dc.subjectEuropium
dc.subjectIodine
dc.subjectLaser excitation
dc.subjectLight emission
dc.subjectMetal ions
dc.subjectPhosphors
dc.subjectPhotoluminescence
dc.subjectRare earths
dc.subjectSilicon compounds
dc.subjectStructural ceramics
dc.subjectX ray diffraction
dc.subjectAntisymmetries
dc.subjectColor emission
dc.subjectColor purity
dc.subjectCrystal field effects
dc.subjectCrystal fields
dc.subjectDoped materials
dc.subjectDoped sample
dc.subjectEmission characteristics
dc.subjectFirst excited state
dc.subjectGround level
dc.subjectIon laser excitation
dc.subjectLithium metasilicate
dc.subjectOrthorhombic structures
dc.subjectPhosphor materials
dc.subjectPhotoluminescence investigation
dc.subjectPL spectra
dc.subjectRadiative transitions
dc.subjectRare earth ions
dc.subjectRelative intensity ratio
dc.subjectSolid state synthesis
dc.subjectLithium
dc.titlePhotoluminescence investigations of Li 2SiO 3:Ln (Ln=Er 3+, Eu 3+, Dy 3+, Sm 3+) phosphors
dc.typeArticle

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