Synthesis and Characterization of Eu<sup>+++</sup> Doped Y<sub>2</sub>O<sub>3</sub> (Red Phosphor) and Tb<sup>+++</sup> Doped Y<sub>2</sub>O<sub>3</sub> (Green Phosphor) by Hydrothermal Processes — Oak Academic Publishing
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Synthesis and Characterization of Eu<sup>+++</sup> Doped Y<sub>2</sub>O<sub>3</sub> (Red Phosphor) and Tb<sup>+++</sup> Doped Y<sub>2</sub>O<sub>3</sub> (Green Phosphor) by Hydrothermal Processes
Nanotechnology and Molecular Biology Laboratory, Centre of Biotechnology, University of Allahabad, Allahabad, India
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Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
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Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
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Nanotechnology and Molecular Biology Laboratory, Centre of Biotechnology, University of Allahabad, Allahabad, India
1 Nanotechnology and Molecular Biology Laboratory, Centre of Biotechnology, University of Allahabad, Allahabad, India
2 Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
3 Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
4 Nanotechnology and Molecular Biology Laboratory, Centre of Biotechnology, University of Allahabad, Allahabad, India
Eu +++ and Tb +++ doped Y 2 O 3 nanoparticles have been synthesized by hydrothermal process using yttrium oxo-isopropoxide Y 5 O(OPr i ) 13 as precursor (OPr i = isopropxy). X-ray diffraction (XRD), transmission electron microscopy (TEM), nanoparticle size analyzer and photoluminescence (PL) spectroscopy have been used to characterize these powders. The as synthesized powders gave very sharp peak in the X-ray diffraction suggesting crystalline particles with average particle size between 28 - 51 nm for Eu +++ doped Y 2 O 3 nanoparticles and 43 - 51 nm for Tb +++ doped Y 2 O 3 nanoparticles annealed at 300℃ for 3 h, 4 h and 5 h, which could be unique in comparison to other reports. Transmission electron micrograph investigation of the particles shows single dispersed particles along with agglomerates. The ratio of intensities of transitions in the europium and terbium emission spectrum have been used as structural probe to indicate the local environment around Eu +++ and Tb +++ in the Y 2 O 3 particles.
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