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A comparison of spectroscopic properties of Dy3+-doped tetragonal tungsten bronze MTa2O6 (M = Sr, Ba, Pb) phosphors based on Judd–Ofelt parameters

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Abstract

TTB (tetragonal tungsten bronze) crystal structures exhibit very interesting physical properties as well as the superiority of having different cationic sites and allowing doping. In the study, the spectroscopic results of TTB-MTa2O6:Dy3+ (M = Sr, Ba, Pb) phosphors are presented using Judd–Ofelt (JO) intensity parameters. The PL and RL spectra of the phosphors exhibited the characteristic emissions of Dy in the visible and infrared regions. The PL excitation spectra were used to determine JO parameters (Ω2, Ω4, Ω6). The decreasing trend of Ω2 parameter and PL asymmetry is SrTa2O6:Dy3+ > PbTa2O6:Dy3+ > BaTa2O6:Dy3+, which shows low electronegativity and shifting to the long wavelength of BaTa2O6:Dy3+ supports the low value of the Ω2 parameter and covalence. The PL decay profiles of all the phosphors are double exponential and the fast decreasing of PL decay components of SrTa2O6:Dy3+ is compatible with the concentration quenching after 5 mol%. The decreasing trend of the observed lifetime is in order BaTa2O6:Dy3+  > PbTa2O6:Dy3+  > SrTa2O6:Dy3+, which can be attributed to the defect centers depending on the increase of the covalency.

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Acknowledgements

We have performed the spectroscopic and structural analyses by ourselves.

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Authors and Affiliations

  1. Department of Environmental Engineering, Faculty of Engineering, Marmara University, Kadıköy, 34722, Istanbul, Turkey

    Mustafa İlhan

  2. Department of Electricity and Energy, Soma Vocational School, Manisa Celal Bayar University, Soma, 45500, Manisa, Turkey

    İlker Çetin Keskin

  3. Department of Mechanical Engineering, Ege University, Bornova, 35040, İzmir, Turkey

    Lütfiye Feray Güleryüz

  4. Experimental Applied Science and Research Center, Manisa Celal Bayar University, 45030, Manisa, Turkey

    Mehmet İsmail Katı

Authors
  1. Mustafa İlhan
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  2. İlker Çetin Keskin
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  3. Lütfiye Feray Güleryüz
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  4. Mehmet İsmail Katı
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Contributions

Conception and design of the study: Mİ, acquisition of data: İÇK, LFG, and Mİ, analysis and/or interpretation of data: Mİ, İÇK, LFG, and MİK, drafting the manuscript: Mİ, İÇK, MİK, and LFG; revising the manuscript critically for important intellectual content: Mİ and İÇK Author’s name (typed).

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Correspondence to Mustafa İlhan.

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İlhan, M., Keskin, İ.Ç., Güleryüz, L.F. et al. A comparison of spectroscopic properties of Dy3+-doped tetragonal tungsten bronze MTa2O6 (M = Sr, Ba, Pb) phosphors based on Judd–Ofelt parameters. J Mater Sci: Mater Electron 33, 16606–16620 (2022). https://doi.org/10.1007/s10854-022-08557-3

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