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

Saloni, Puneet Kaur, Suruchi Sharma, and Atul Khanna

Department of Physics, Guru Nanak Dev University, Amritsar, India

 

E-mail: atul.phy@gndu.ac.in

Received: 14 April 2022  Accepted: 15 September 2022

Abstract:

1 mol% Re2O3–99 mol% Ca3(PO4)(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)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.

Keywords: β-Tricalcium phosphate; X-ray diffraction; Thermal properties; Raman and photoluminescence spectroscopy; CIE coordinates; CCT and color purity

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02497-2

 

Chemical Papers 77 (2) 795–803 (2023)

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