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Spectral Investigations on Cu2+-doped Li2CaAl4(PO4)4F4 Phosphors

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Abstract

Cu2+-doped Li2CaAl4(PO4)4F4 nanophosphor has been synthesized using solid-state reaction method at room temperature. The prepared phosphor is characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), optical absorption, photoluminescence (PL), electron paramagnetic resonance (EPR) and Fourier transform infrared (FT-IR) techniques. From powder XRD pattern, the evaluated average crystallite size is in the order of nanoscale. Morphological studies of prepared sample were analyzed using SEM and TEM. The optical absorption spectrum reveals that Cu2+ enters into the tetragonally distorted octahedral site in the host lattice. Spin-Hamiltonian, crystal field and bonding parameters are evaluated from the EPR spectrum. The PL spectrum of Cu2+-doped Li2CaAl4(PO4)4F4 phosphor gives emission peaks in the UV and blue region. The FT-IR spectrum exhibited bands which are attributed to vibrations of phosphate ions, P–O–H and water molecules.

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Acknowledgments

RVSSN would like to thank UGC-DRS and DST-FIST, New Delhi for providing financial assistance to the Department of Physics, Acharya Nagarjuna University to carry out the present research work.

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Authors and Affiliations

  1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, 522 510, AP, India

    B. Jaya Raja, M. Rajesh Yadav, V. Pushpa Manjari, K. Ravindranadh, M. Avinash & R. V. S. S. N. Ravikumar

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  1. B. Jaya Raja
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  2. M. Rajesh Yadav
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  3. V. Pushpa Manjari
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  4. K. Ravindranadh
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  6. R. V. S. S. N. Ravikumar
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Correspondence to R. V. S. S. N. Ravikumar.

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Raja, B.J., Yadav, M.R., Manjari, V.P. et al. Spectral Investigations on Cu2+-doped Li2CaAl4(PO4)4F4 Phosphors. Appl Magn Reson 46, 953–964 (2015). https://doi.org/10.1007/s00723-015-0697-9

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  • DOI: https://doi.org/10.1007/s00723-015-0697-9

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