Synthesis, characterization and enhanced photoluminescence and temperature dependence of ZrO2:Dy3+ phosphors upon incorporation of K+ ions

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dc.contributor.authorCan N.
dc.contributor.authorCoban M.B.
dc.contributor.authorSouadi G.
dc.contributor.authorKaynar Ü.H.
dc.contributor.authorAyvacikli M.
dc.contributor.authorGarcia Guinea J.
dc.contributor.authorEkdal Karali E.
dc.date.accessioned2024-07-22T08:02:12Z
dc.date.available2024-07-22T08:02:12Z
dc.date.issued2023
dc.description.abstractThis study reports the successful synthesis and comprehensive characterization of ZrO2:Dy3+ phosphors with the incorporation of K+ ions. The introduction of Dy3+ and K+ in the ZrO2 lattice as lanthanide activators demonstrates its potential as an efficient host material. The structural integrity of ZrO2 remains unaltered following the doping process. Fourier-transform infrared spectroscopy (FTIR) analysis confirms the presence of Zr-O and O-H stretching, along with H2O bending modes in the phosphor sample. The wide luminescence band seen at 460 nm is attributed to luminescence defects in the ZrO2 induced by oxygen, and the presence of water molecules. Photoluminescence (PL) spectra analysis reveals pronounced emission peaks at 491 and 578 nm, corresponding to 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions, respectively, upon excitation at 349 nm. Optimizing the Dy3+ doping concentration to 0.4 wt% and achieving a critical distance of 31.82 Å resulted in efficient energy transfer. Notably, co-doping K+ as a charge compensator significantly enhances the luminescence intensity. Moreover, at lower temperatures, direct excitation of Dy3+ ions through our pump wavelength, coupled with exciton-mediated energy transfer, leads to a remarkable increase in PL intensity. Tailoring the doping concentrations effectively shifts the emission spectrum of the phosphor mixture, aligning with the standard white light illumination coordinates (0.333, 0.333). This property positions the material as a promising candidate for applications in white light-emitting diodes (WLEDs) and various high-quality lighting applications. The enhanced photoluminescence and temperature dependence observed in ZrO2:Dy3+ phosphors upon the incorporation of K+ ions pave the way for their potential utilization in advanced luminescent devices. © 2023 Elsevier Ltd and Techna Group S.r.l.
dc.identifier.DOI-ID10.1016/j.ceramint.2023.09.003
dc.identifier.issn02728842
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/11763
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectDysprosium compounds
dc.subjectEmission spectroscopy
dc.subjectEnergy transfer
dc.subjectFourier series
dc.subjectFourier transform infrared spectroscopy
dc.subjectIons
dc.subjectLight emitting diodes
dc.subjectMolecules
dc.subjectPhosphors
dc.subjectTemperature distribution
dc.subjectZirconia
dc.subjectBending modes
dc.subjectDoping concentration
dc.subjectDoping process
dc.subjectDy3+
dc.subjectHost materials
dc.subjectK+
dc.subjectLuminescence band
dc.subjectPresence of water
dc.subjectTemperature dependence
dc.subjectWhite light emitting diodes
dc.subjectPhotoluminescence
dc.titleSynthesis, characterization and enhanced photoluminescence and temperature dependence of ZrO2:Dy3+ phosphors upon incorporation of K+ ions
dc.typeArticle

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