Photoluminescence and energy transfer mechanism in YBa(SiO)F apatite phosphors doped with cerium and terbium
Bulletin of Materials Science, ISSN: 0973-7669, Vol: 45, Issue: 3
2022
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Article Description
YBa(SiO)F (YBSF) phosphors having apatite structure was doped with cerium and terbium and prepared by solid-state reaction method. Structural and photoluminescence properties of the prepared apatite phosphors were studied and discussed in detail. X-ray diffraction graph affirms that the prepared phosphor has hexagonal symmetry with space group P6/m, representing the apatite structure. Scanning electron microscopy reveals the morphology of the prepared phosphor and clearly shows an elongated rod-like structure. Energy dispersive X-ray spectroscopy pattern confirms the presence of all initial constituents in YBSF:0.6Ce, xTb. Fourier transform infrared spectroscopy study was conducted to identify various functional groups present in the prepared phosphors. Photoluminescence excitation and photoluminescence emission spectra of YBSF:0.8Tb and YBSF:0.6Ce,xTb (x = 0, 0.2, 0.4, 0.6, 0.8 and 1 mol%) were obtained and studied. Photoluminescence spectra successfully established the energy transfer mechanism working between Ce and Tb ions and the energy transfer efficiency was found to be 66%. Commission Internationale de I’Eclairage(CIE) chromaticity coordinate clearly shows the colour tenability property of YBSF:0.6Ce,xTb. The emitted light in YBSF:0.6Ce,xTb depends on the concentration of Tb.
Bibliographic Details
Springer Science and Business Media LLC
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