Radioluminescence results, thermoluminescence analysis and kinetic parameters of Y2O3:Ln3+ (Ln: Dy, Nd, Sm) nanophosphors obtained by sol-gel method

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dc.contributor.authorKeski̇n İ.Ç.
dc.date.accessioned2024-07-22T08:04:13Z
dc.date.available2024-07-22T08:04:13Z
dc.date.issued2022
dc.description.abstractDy3+, Nd3+, Sm3+ doped Y2O3 nanophosphors were produced with high homogeneity at low sintering temperature using the sol-gel method. To compare the structural and optical changes of different rare-earth ions included in the crystal lattice, the dopant ratio was chosen as constant 2 mol%. In the light of X-ray diffraction (XRD) analysis, the unit cell volume and average crystallite size of the doped nanophosphors and their pure Y2O3 sintered under the same heat treatment regime were calculated and compared. Scanning electron microscopy (SEM) techniques were used to describe their structures and morphologies; an average particle size histogram of nanostructures was generated. The Radioluminescence (RL) spectra of Y2O3:Ln3+ (Ln: Dy, Nd, Sm) nanophosphors were presented for the first time. Splittings were seen in detail in the emission spectra given the 200–1100 nm range. For Dy3+ 4F9/2 → 6H13/2, for Nd3+; in the visible region 4H11/2-4I9/2 in the NIR region 4F3/2-4I9/2, for Sm3+; in the visible region 4G5/2-6H7/2 in the NIR region 4G5/2-6F5/2 transitions were determined to have the most vigorous emission. It was observed that the optical band gap calculated from the absorption spectrum of Y2O3 was 4.97 eV; this value changed the most with Dy contribution and decreased to 4.77 eV. The thermoluminescence (TL) behaviors of nanophosphors were compared under both UV and X-ray excitation. The kinetic parameters were calculated by applying computerized glow curve deconvolution (CGDC), and various heating rate (VHR) methods to the glow curves obtained UV excitation. The obtained E (eV) values correlated with each other are highly compatible. © 2022 Elsevier Ltd and Techna Group S.r.l.
dc.identifier.DOI-ID10.1016/j.ceramint.2022.04.025
dc.identifier.issn02728842
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/12604
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectAbsorption spectroscopy
dc.subjectActivation energy
dc.subjectCrystallite size
dc.subjectEmission spectroscopy
dc.subjectEnergy gap
dc.subjectInfrared devices
dc.subjectKinetic parameters
dc.subjectNeodymium compounds
dc.subjectParticle size
dc.subjectParticle size analysis
dc.subjectPhosphors
dc.subjectRare earths
dc.subjectScanning electron microscopy
dc.subjectSintering
dc.subjectSol-gel process
dc.subjectSol-gels
dc.subjectThermoluminescence
dc.subjectX ray diffraction analysis
dc.subjectYttrium aluminum garnet
dc.subjectKinetics parameter
dc.subjectNanophosphors
dc.subjectNIR regions
dc.subjectRadio-luminescence
dc.subjectRare-earths doping
dc.subjectSol- gel methods
dc.subjectThermoluminescence
dc.subjectVisible region
dc.subjectX ray luminescence
dc.subjectX-ray luminescence
dc.subjectMetal ions
dc.titleRadioluminescence results, thermoluminescence analysis and kinetic parameters of Y2O3:Ln3+ (Ln: Dy, Nd, Sm) nanophosphors obtained by sol-gel method
dc.typeArticle

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