Synthesis and Photoluminescence Properties of Ca5(PO4)3F: Ln (Ln: Dy3+, Eu3+ and  Sm3+) Phosphors for near UV-based solid state lighting

C.M. Nandanwar; N.S. Kokode

doi:10.15330/pcss.23.3.597-603

Authors

C.M. Nandanwar Department of Physics, N.H. College, Bramhapuri, Chandrapur 441206, India
N.S. Kokode Department of Physics, N.H. College, Bramhapuri, Dist-Chandrapur, 441206, India

DOI:

https://doi.org/10.15330/pcss.23.3.597-603

Keywords:

Wet chemical synthesis, XRD, Photoluminescence, Phosphor, Lanthanide doped, CIE chromaticity coordinates, Solid state lighting

Abstract

The wet chemical synthesis of Ca₅(PO₄)₂F host with lanthanide doped Dy³⁺, Eu³⁺ and Sm³⁺was reported. The X-ray diffraction (XRD), structural and photoluminescence characteristics of phosphors were thoroughly investigated. The hexagonal system with the space group P 63/m (176) was verified by X-ray powder diffraction. Under UV excitation (352 nm), Ca₅(PO₄)₂F:Dy³⁺ emits 481 nm (blue) and 575 nm (yellow), corresponding to ⁴F_9/2→⁶H_15/2(magnetic dipole) and ⁴F_9/2→⁶H_13/2(electric dipole) transitions, respectively. When Ca₅(PO₄)₂F:Eu³⁺ phosphor was excited at 394 nm, the emission spectra showed strong bands at 591 nm (orange) and 614 nm (red). When excited at 403 nm, the emission spectra of Sm³⁺ activated Ca₅(PO₄)₂F phosphor displayed emission peaks at 565 nm (yellow) and 599 nm (orange), respectively. The research analyses the photoluminescence characteristics of Ca₅(PO₄)₃F: Ln (Ln: Dy³⁺, Eu³⁺ and Sm³⁺) as a possible material for near UV-based solid-state lighting.

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