Citrate mediated synthesis and tuning of luminescence in Eu3+ incorporated Gd2O3 nanophosphors

Gd1.9Eu0.1O3 nanophosphors were prepared successfully by a large-scale facile solution based citrate-metal complex controlled combustion method and was systematically studied by varying the citric acid to metal cation ratio. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission e...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 73; no. 1
Main Author Abhilash Kumar, R G
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 17.02.2015
Subjects
Cations
Citric acid
Coordination compounds
Crystal defects
Crystal structure
Electric dipoles
Electron microscopy
Emission spectra
Europium
Flat panel displays
Fluorescent lamps
Gadolinium oxides
Light emitting diodes
Luminescence
Magnetic resonance imaging
Metal ions
Microscopy
Morphology
Nanophosphors
Optical properties
Phase composition
Photoluminescence
Ultraviolet radiation
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Summary:Gd1.9Eu0.1O3 nanophosphors were prepared successfully by a large-scale facile solution based citrate-metal complex controlled combustion method and was systematically studied by varying the citric acid to metal cation ratio. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) measurements and radiative properties were done to evaluate the crystal structure, phase formation, phase composition, surface morphology, radiative and luminescent properties of the prepared nanophosphors. Photoluminescent emission intensity of the samples can be correlated with the amount of citric acid, improved crystallinity, uniform morphology, particle size, reduced defects, and proper diffusion of Eu3+ in to the crystal structure of Gd2O3. Higher asymmetricity results in intense red emission (612 nm) due to 5D0-7F2 forced electric dipole transition and found that photoluminescence intensity is highest for the sample prepared with citric acid to metal cation ratio of 2:1. The existence of strong red emission from Gd1.9Eu0.1O3 nanophosphor corresponding to 5D0-7F2 transition (612 nm) of Eu3+ under UV light excitation make it a promising candidate for applications in bio assays, magnetic resonance imaging, deep uv LED's, solid state lighting, fluorescent lamps and flat panel displays.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/73/1/012122