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

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dc.contributor.authorIlhan, M
dc.contributor.authorKeskin, IÇ
dc.date.accessioned2024-07-18T11:54:24Z
dc.date.available2024-07-18T11:54:24Z
dc.description.abstractIn this work, Dy3+-doped SrNb(2)O(6)phosphors 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:Dy(3+)exhibited a strong blue emission peak at 576.0 nm related to(4)F(9/2)->(6)H(15/2)transition of Dy. The high RL emission of the(4)F(9/2)-> H-6(15/2)(electric dipole) transition upon X-ray-induced excitation led to a decrease in Dy(3+)local environmental symmetry. The Judd-Ofelt (J-O) theory was applied to the PL excitation spectra for the calculation of optical data such as omega(2),omega(4), and omega(6)parameters, radiative transition probability (A(r)), branching ratios (beta,beta(exp)) and stimulated emission cross-section (sigma(e)). The quantum efficiencies (eta(QE)) 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.
dc.identifier.issn1463-9076
dc.identifier.other1463-9084
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/6342
dc.language.isoEnglish
dc.publisherROYAL SOC CHEMISTRY
dc.subjectEU3+
dc.subjectPHOTOLUMINESCENCE
dc.subjectABSORPTION
dc.subjectGLASS
dc.subjectFLUORESCENCE
dc.subjectINTENSITIES
dc.subjectLIFETIME
dc.subjectSPECTRA
dc.subjectIONS
dc.subjectER3+
dc.titleAnalysis of Judd-Ofelt parameters and radioluminescence results of SrNb2O6:Dy3+ phosphors synthesized via molten salt method
dc.typeArticle

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