Effect of [gamma]-irradiation on structural, morphological and luminescence properties of cerium-doped Y3Al5O12 nano-material

Cerium-doped yttrium aluminum garnet (YAG: Ce3+) nanopowder phosphors have been elaborated by sol-gel process and annealed at 900°C for 2 h. The prepared phosphors were exposed to gamma radiation, using 60Co source, at different doses ranging from 5 to 100 kGy. The influence of γ-irradiation on the...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2019-09, Vol.174 (9-10), p.873
Main Authors: Boukerika, Allaoua, Guerbous, Lakhdar
Format: Article
Language:English
Subjects:
Aluminum
Cerium
Crystallites
Dislocation density
Emission analysis
Field emission microscopy
Fourier transforms
Gamma rays
Infrared analysis
Infrared spectroscopy
Irradiation
Luminescence
Morphology
Nanomaterials
Nanophosphors
Optical properties
Phosphors
Photoluminescence
Photomicrographs
Sol-gel processes
X-ray diffraction
Yttrium
Yttrium-aluminum garnet
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Summary:Cerium-doped yttrium aluminum garnet (YAG: Ce3+) nanopowder phosphors have been elaborated by sol-gel process and annealed at 900°C for 2 h. The prepared phosphors were exposed to gamma radiation, using 60Co source, at different doses ranging from 5 to 100 kGy. The influence of γ-irradiation on the structural, morphological and luminescence properties of YAG: Ce3+ phosphors were investigated in detail by X-ray diffraction, field emission scanning electron microscopy (FESEM), Fourier transforms infrared spectroscopy (FTIR) and photoluminescence measurements. The XRD analysis confirmed the presence of single cubic phase for all samples of YAG: Ce3+ nanophosphors independent of γ-rays dose. FESEM micrograph results revealed that the particles present flate-like shapes and high density of dislocation for sample irradiated at 100 kGy of γ-ray. The YAG: Ce3+ nanophosphors showed broad green-yellow emission band in the range of 450-700 nm with maximum intensity at 538 nm assigned to the 5d -> 4f transitions of Ce3+ ion. The emission intensity of YAG: Ce3+ phosphors vary with the γ-ray irradiation and reach the maximum for sample irradiated to a dose of 25 kGy. The variation of luminescence intensity is related to the crystallite size and Ce4+ ions content in YAG host nanomaterial.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420150.2019.1667357