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Title: Synthesis and Characterization of Doped Nano-Phosphor for Luminescence Studies
Authors: Chamoli, Pankaj
Supervisor: Raina, K. K.
Keywords: Phosphor Material;Zinc Oxide;solid state reaction method;Optical Property
Issue Date: 12-Aug-2010
Abstract: Present study is an attempt to synthesize pure, Mg and Mn doped ZnO via solid state reaction method and chemical co-precipitation route using various solvents in basic medium. The structural morphological, chemical and optical properties were studied by using X-Ray diffraction, Scanning electron microscopy, Fourier transform infrared spectroscopy, UV-VIS and Photoluminescence spectrophotometer. XRD analysis inferred that the pure and doped sample prepared by SSR method and chemical approach (ethanol and methanol) were single phase and exhibited wurtzite hexagonal structure up to the higher dopant concentration(15%). However, the samples prepared in the presence of distilled water accept the dopant only up to 7%. Well defined spherical grains were noticed in the sample prepared by SSR, however, no definite morphology has been observed in the samples derived via chemical route. Chemical study gives only the preliminary signatures of the ZnO phase formation. The band gap observed for the chemically synthesized samples was found to increase with the increment in the dopant concentration. Violet and blue emissions have been noticed for all the samples when excited at the wavelength 250 nm.
Description: M.Tech. (Materials and Metallurgical Engineering)
Appears in Collections:Masters Theses@SPMS

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