Luminescence of undoped and Eu3+ activated zinc gallate phosphor: Synthesis, unusual intense 5D0 → 7F4 red emission

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dc.contributor.authorSouadi G.
dc.contributor.authorKaynar Ü.H.
dc.contributor.authorAyvacikli M.
dc.contributor.authorCan N.
dc.date.accessioned2024-07-22T08:02:25Z
dc.date.available2024-07-22T08:02:25Z
dc.date.issued2023
dc.description.abstractA series of Eu3+-doped ZnGa2O4 samples were synthesized via the urea-glycine combustion route. Powder X-ray diffraction (XRD) was used to investigate the crystallinity of the samples, energy dispersive spectroscopy (EDS) to explore the elemental composition, Fourier transform infrared (FTIR), to observe the vibrational modes of the samples, photoluminescence (PL) to determine the luminescence properties. The XRD data prove that the samples remain single cubic structure even at high concentrations of Eu³⁺, enabling the formation of a unique emission spectrum. The active ion concentration was varied to examine the influence of concentration on luminescent properties. This study revealed a 5D0 →7F4 transition located at 700 nm with unusual intensity that has not been documented in the literature, which suggests that the active ion concentration can influence the luminescent characteristics of the phosphors. The increasing Eu3+ content increases the number of Eu3+ ions in ZnGa2O4 host lattice, which enhances the luminescence efficiency of the phosphor. However, beyond a certain level of Eu3+content (i.e., 3 wt% Eu3+), the number of Eu3+ ions becomes excessive, resulting in a reduction in luminescence efficiency due to concentration quenching. The dipole dipole interaction is elucidated to play a prominent role in the mechanism of Eu3+ quenching in the ZnGa2O4. An assessment of color coordinates based on emission spectra reveals that the coordinates shift from blue to the white light region, and then to red as Eu3+ content increases. This suggests that there is a substantial relationship between the Eu3+ concentration and the measured color coordinates. © 2023 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.apradiso.2023.110905
dc.identifier.issn09698043
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/11859
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectAmino acids
dc.subjectEmission spectroscopy
dc.subjectEnergy dispersive spectroscopy
dc.subjectEuropium compounds
dc.subjectFourier series
dc.subjectFourier transform infrared spectroscopy
dc.subjectGallium compounds
dc.subjectIons
dc.subjectPhosphors
dc.subjectQuenching
dc.subjectRed Shift
dc.subjectUrea
dc.subjectX ray diffraction
dc.subjectZinc
dc.subjectZinc compounds
dc.subjecteuropium
dc.subjectgallic acid
dc.subjectphosphorus
dc.subjectzinc
dc.subjectActive ions
dc.subjectColor coordinates
dc.subjectEmission spectrums
dc.subjectIon concentrations
dc.subjectLuminescence efficiencies
dc.subjectQuenching
dc.subjectRed emissions
dc.subjectUnusual red emission
dc.subjectX- ray diffractions
dc.subjectZinc gallate
dc.subjectArticle
dc.subjectchemical composition
dc.subjectcolor
dc.subjectconcentration (parameter)
dc.subjectcontrolled study
dc.subjectcrystal
dc.subjectdipole
dc.subjectelemental analysis
dc.subjectenergy dispersive X ray spectroscopy
dc.subjectFourier transform infrared spectroscopy
dc.subjectluminescence
dc.subjectphotoluminescence
dc.subjectradiation
dc.subjectreduction (chemistry)
dc.subjectsynthesis
dc.subjectunusual red emission
dc.subjectvibration
dc.subjectX ray diffraction
dc.subjectPhotoluminescence
dc.titleLuminescence of undoped and Eu3+ activated zinc gallate phosphor: Synthesis, unusual intense 5D0 → 7F4 red emission
dc.typeArticle

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