Enhanced luminescence and quenching mechanisms in Na⁺ Co-doped K₇CaY₂(B₅O₁₀)₃:Tb3+ phosphors under UV radiation

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dc.contributor.authorAlsam, Amani A.
dc.contributor.authorKaynar, U.H.
dc.contributor.authorAydin, H.
dc.contributor.authorCoban, M.B.
dc.contributor.authorCanimoglu, A.
dc.contributor.authorCan, N.
dc.date.accessioned2025-03-20T09:44:55Z
dc.date.available2025-03-20T09:44:55Z
dc.date.issued2025
dc.departmentİzmir Bakırçay Üniversitesi
dc.description.abstractThis study investigates the structural and luminescent properties UV radiation of Tb³⁺-doped K₇CaY₂(B₅O₁₀)₃ (KCYBO) phosphors prepared using a microwave-assisted sol-gel method, with a focus on the impact of Na⁺ co-doping. Tb³⁺ ions were effectively integrated as evidenced by X-ray diffraction (XRD) and Rietveld analysis, without disrupting the crystal structure. Photoluminescence (PL) analysis showed intense green emissions at 542 nm, which are due to the 5D₄ → 7F₅ transition in Tb³⁺. Optimal luminescence was observed at 3 wt% Tb³⁺, beyond which concentration quenching effect was driven by non-radiative cross-relaxation between adjacent Tb³⁺ ions. Na⁺ co-doping enhanced PL intensity by improving energy transfer and reducing non-radiative losses. CIE chromaticity coordinates demonstrated a tunable color shift towards warmer tones with increasing Na⁺ concentration. Thermal stability was assessed through the Arrhenius equation, with an activation energy of 0.31 eV, indicating the material's potential for high-temperature optoelectronic applications. © 2024 Elsevier Ltd
dc.description.sponsorshipTUBITAK-1001
dc.description.sponsorshipTurkish Scientific Research Council, (223M036)
dc.identifier.doi10.1016/j.apradiso.2024.111635
dc.identifier.issn0969-8043
dc.identifier.pmid39674032
dc.identifier.scopus2-s2.0-85211738028
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.apradiso.2024.111635
dc.identifier.urihttps://hdl.handle.net/20.500.14034/2065
dc.identifier.volume217
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofApplied Radiation and Isotopes
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_Scopus_20250319
dc.subjectConcentration quenching
dc.subjectCross relaxation
dc.subjectK₇CaY₂(B₅O₁₀)₃
dc.subjectNon-radiative transition
dc.subjectPhotoluminescence
dc.subjectXRD
dc.titleEnhanced luminescence and quenching mechanisms in Na⁺ Co-doped K₇CaY₂(B₅O₁₀)₃:Tb3+ phosphors under UV radiation
dc.typeArticle

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