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Changes of Tb Emission by Non-radiative Energy Transfer from Dy in Gd2O2S:Tb Phosphor

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Abstract

In this study, the Gd2O2S:Tb1.5Dy x=0.3,0.6,0.9 nanophosphor were synthesized by the homogenous precipitation method followed with a sulfur reaction. The fluorescence of Gd2O2S:Tb1.5,Dy nanophosphors, and the energy transfer between dysprosium (Dy) and Tb have been studied. Although, the two weak emissions of Dy were observed, the terbium (Tb) emission was increased due to energy transfer from Dy ions to Tb ions. The results illustrated that the co-activator of Dy had a significant influence on the spectral properties of the Gd2O2S:Tb1.5 nanophosphor with an optimal amount of Dy (0.3 mol%). Moreover, Gd2O2S:Tb1.5 and Gd2O2S:Tb1.5,Dy nanophosphors screens were prepared with 10 mg/cm2 coating thickness. The scintillation properties of these screens have been investigated. We found a Gd2O2S:Tb1.5,Dy0.3 scintillator can be employed in x-ray imaging applications.

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Authors and Affiliations

  1. Department of Nuclear Engineering, Faculty of Advance Sciences and Technology, University of Isfahan, 81746-73441, Isfahan, Iran

    Kh. Rezaee Ebrahim Saraee, M. Darvish Zadeh, M. Mostajaboddavati & A. Aghay Kharieky

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  1. Kh. Rezaee Ebrahim Saraee
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  2. M. Darvish Zadeh
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  3. M. Mostajaboddavati
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  4. A. Aghay Kharieky
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Correspondence to Kh. Rezaee Ebrahim Saraee.

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Saraee, K.R.E., Zadeh, M.D., Mostajaboddavati, M. et al. Changes of Tb Emission by Non-radiative Energy Transfer from Dy in Gd2O2S:Tb Phosphor. J. Electron. Mater. 45, 4806–4812 (2016). https://doi.org/10.1007/s11664-016-4639-6

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  • DOI: https://doi.org/10.1007/s11664-016-4639-6

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