Analysis of Judd-Ofelt parameters and radioluminescence results of SrNb2O6:Dy3+phosphors synthesizedviamolten salt method

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dc.contributor.authorİlhan M.
dc.contributor.authorKeskin İ.Ç.
dc.date.accessioned2024-07-22T08:07:02Z
dc.date.available2024-07-22T08:07:02Z
dc.date.issued2020
dc.description.abstractIn this work, Dy3+-doped SrNb2O6phosphors were fabricated by the molten salt process, which avoids high sintering temperatures, prolonged reaction time and poor compositional homogeneity. All samples crystallized to the orthorhombic columbite structure with space group,P21/c, while a rod-like morphology was observed by scanning electron microscopy (SEM). PL (photoluminescence) and RL (radioluminescence) spectra of SrNb2O6:Dy3+exhibited a strong blue emission peak at 576.0 nm related to4F9/2→6H15/2transition of Dy. The high RL emission of the4F9/2→6H15/2(electric dipole) transition upon X-ray-induced excitation led to a decrease in Dy3+local environmental symmetry. The Judd-Ofelt (J-O) theory was applied to the PL excitation spectra for the calculation of optical data such asΩ2,Ω4, andΩ6parameters, radiative transition probability (Ar), branching ratios (β,βexp) and stimulated emission cross-section (σe). The quantum efficiencies (ηQE) varied between 35.47 and 31.93%, which are compatible with theoretical quantum efficiencies based on the Einstein relation. The CIE chromaticity coordinates (x,y) and CCT (correlated color temperature) parameter for 3 mol% phosphor were defined (0.385, 0.432) and 4209 K, respectively. © the Owner Societies 2020.
dc.identifier.DOI-ID10.1039/d0cp02256j
dc.identifier.issn14639076
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/13791
dc.language.isoEnglish
dc.publisherRoyal Society of Chemistry
dc.subjectEfficiency
dc.subjectElectric excitation
dc.subjectJudd-Ofelt theory
dc.subjectLight emission
dc.subjectPhosphors
dc.subjectScanning electron microscopy
dc.subjectSemiconductor quantum wells
dc.subjectColumbite structure
dc.subjectCompositional homogeneity
dc.subjectCorrelated color temperature
dc.subjectHigh sintering temperatures
dc.subjectJudd-Ofelt parameters
dc.subjectRadiative transition probabilities
dc.subjectRod-like morphology
dc.subjectStimulated emission cross section
dc.subjectQuantum efficiency
dc.titleAnalysis of Judd-Ofelt parameters and radioluminescence results of SrNb2O6:Dy3+phosphors synthesizedviamolten salt method
dc.typeArticle

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