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Synthesis and characterization of Sm, Dy and Er-doped β-Ca3(PO4)2 phosphors

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Abstract

1 mol% Re2O3–99 mol% Ca3(PO4)2 (Re = Sm, Dy and Er) powder samples were prepared by solid-state sintering method. The structural, thermal, vibrational and optical properties were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), differential scanning calorimetry (DSC), Raman and photoluminescence techniques. XRD studies confirm the formation of β-Ca3(PO4)2 with the rhombohedral crystal structure. FESEM images reveal the formation of flake-like agglomerated particles of size in the range of 100–700 nm. DSC analysis shows that β-TCP → α-TCP structural phase transition occurs at 1286 ºC, followed by α-TCP → α'-TCP transformation at 1469 ºC. Raman spectra of the samples show antisymmetric and symmetric stretching and bending vibration bands of P-O linkages. Photoluminescence studies found intense reddish-orange emission in Sm-doped samples, white light emission in Dy-doped samples and yellow emission in Er-doped samples. The luminescence intensity of Sm and Dy-doped β-TCP samples is found to be significantly higher than that of Er-doped samples.

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Acknowledgements

Atul Khanna acknowledges Department of Science and Technology and Council of Scientific and Industrial Research, India, for research grants.

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  1. Department of Physics, Guru Nanak Dev University, Amritsar, 143005, Punjab, India

    Saloni, Puneet Kaur, Suruchi Sharma & Atul Khanna

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  1. Saloni
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  2. Puneet Kaur
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  3. Suruchi Sharma
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  4. Atul Khanna
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Correspondence to Atul Khanna.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Author’s conribution

AK conceptualized the research problem and planned the experiments. S prepared and characterized the samples. PK and SS carried out DSC measurements on the samples. The data analysis was done by S and AK. The manuscript writing and editing was done by S and AK.

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Saloni, Kaur, P., Sharma, S. et al. Synthesis and characterization of Sm, Dy and Er-doped β-Ca3(PO4)2 phosphors. Chem. Pap. 77, 795–803 (2023). https://doi.org/10.1007/s11696-022-02497-2

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