Luminescence characteristics and kinetic parameters of LiBaPO4: Tb3+, Dy3+ phosphors synthesized by sol-gel method

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dc.contributor.authorKatı M.İ.
dc.contributor.authorGökçe S.
dc.contributor.authorKeskin İ.Ç.
dc.contributor.authorTüremiş M.
dc.contributor.authorÇetin A.
dc.contributor.authorKibar R.
dc.date.accessioned2024-07-22T08:01:43Z
dc.date.available2024-07-22T08:01:43Z
dc.date.issued2024
dc.description.abstractLiBaPO4: Tb3+, Dy3+ phosphors were prepared via sol-gel method by using the stoichiometric amounts of lithium nitrate LiNO3, barium nitrate Ba(NO3)2 and ammonium dihydrogen phosphate NH4H2PO4 as base materials. Morphology by scanning electron microscopy (SEM), structure by X-ray diffraction (XRD), thermal properties by Differential thermal analysis (DTA)/Thermogravimetric Analysis (TGA) and structural characteristics by Fourier transform infrared spectroscopy (FT-IR) were investigated. This paper presents luminescence properties using spectra from radioluminescence (RL), photoluminescence (PL), cathodoluminescence (CL) and, thermoluminescence (TL) and the influence of RE dopants (Tb3+, Dy3+) on the luminescent behavior of LiBaPO4. Computerized Glow Curve Deconvolution (CGCD) and Peak Shape Method were used to determine the kinetic parameters and the obtained results were evaluated. The RL results of un-doped LiBaPO4 showed the presence of a well-defined peak at 417 nm and a weaker band around 685 nm. Strong emissions were detected in the sample doped with Dy3+ correspond to 4F9/2→6Hj transitions. Blue, yellow and red emissions were observed with transitions of 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2, respectively. As for LiBaPO4: Tb3+, green emissions originated from the characteristic transitions (5D3 → 7FJ (j = 6–3) and 5D4 → 7FJ (j = 6–1)) of Tb+3 ion was seen. The RL, PL and CL spectra were identical, suggesting these green emissions. Dy3+ doped sample has three glow curves located at 72 °C, 145 °C and 204 °C, while the main temperature peak is measured at 240 °C for Tb3+ doped sample. Chromotographic studies of LiBa0·98PO4: Dy3+0.02 reveals that calculated x and y color coordinates (0.3122, 0.3233) are very close to the white light. © 2023
dc.identifier.DOI-ID10.1016/j.jlumin.2023.120312
dc.identifier.issn00222313
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/11565
dc.language.isoEnglish
dc.publisherElsevier B.V.
dc.subjectBarium compounds
dc.subjectCathodoluminescence
dc.subjectDifferential thermal analysis
dc.subjectDysprosium compounds
dc.subjectFourier transform infrared spectroscopy
dc.subjectKinetic parameters
dc.subjectLithium compounds
dc.subjectNitrates
dc.subjectPhotoluminescence
dc.subjectScanning electron microscopy
dc.subjectSol-gel process
dc.subjectSol-gels
dc.subjectThermoluminescence
dc.subjectX ray diffraction
dc.subjectCharacteristics parameters
dc.subjectDoped sample
dc.subjectGreen emissions
dc.subjectKinetics parameter
dc.subjectLuminescence characteristics
dc.subjectLuminescence kinetics
dc.subjectRadio-luminescence
dc.subjectRare-earths
dc.subjectSol'gel
dc.subjectSol- gel methods
dc.subjectRare earths
dc.titleLuminescence characteristics and kinetic parameters of LiBaPO4: Tb3+, Dy3+ phosphors synthesized by sol-gel method
dc.typeArticle

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