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EPR and Optical Properties of Green Emitting Mn Activated Sr2ZnSi2O7 Phosphors Prepared by Sol–Gel Method

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Abstract

A series of Mn2+ activated Sr2ZnSi2O7 phosphors with variable Mn2+ ions concentration were prepared via citrate sol–gel method. The systematic analysis of structure and luminescent properties were carried out by recording x-ray diffraction patterns, scanning electron micrographs, excitation and emission spectra along with electron paramagnetic resonance (EPR) spectra. The optimization of Mn2+ ion concentration in the synthesized phosphors was done by analyzing emission spectra. The Mn2+ activated Sr2ZnSi2O7 phosphors exhibit green emission under 263 nm excitation. The EPR spectra exhibit sextet hyperfine lines with resonance at g ≈ 2.0 indicating tetrahedral symmetry and covalent bonding between Mn2+ ions and O2− ligand ions bound to it. All the aforesaid results support the suitability of Mn2+ activated Sr2ZnSi2O7 phosphors as visible green emitters in optoelectronic display devices.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1D1A1B03030003).

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Authors and Affiliations

  1. Department of Chemical Engineering, Konkuk University, Seoul, 05029, Republic of Korea

    Vijay Singh

  2. Department of Physics, Chaudhary Ranbir Singh University, Rohtak Bypass Road, Jind, Haryana, 126 102, India

    Nisha Deopa

  3. Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi, 110 042, India

    Sumandeep Kaur & A. S. Rao

  4. Department of Physics, S.V. University, Tirupati, Andhra Pradesh, 517 502, India

    J. L. Rao

  5. Intelligent Construction Automation Center, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea

    G. Lakshminarayana

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  1. Vijay Singh
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  2. Nisha Deopa
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  3. Sumandeep Kaur
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  4. A. S. Rao
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Correspondence to Vijay Singh.

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Singh, V., Deopa, N., Kaur, S. et al. EPR and Optical Properties of Green Emitting Mn Activated Sr2ZnSi2O7 Phosphors Prepared by Sol–Gel Method. J. Electron. Mater. 49, 2265–2272 (2020). https://doi.org/10.1007/s11664-019-07914-z

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  • DOI: https://doi.org/10.1007/s11664-019-07914-z

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