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Controlling synthesis and host sensitized Eu emissions of KGdF and GdF

Science China Technological Sciences, ISSN: 1869-1900, Vol: 58, Issue: 5, Page: 899-906
2015
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By controlling the reactant ratios, hydrothermal time, hydrothermal temperatures, pH values of the prepared solutions, and the concentrations of KCHO·2HO, 1 mol% Eu doped cubic phase of KGdF and/or orthorhombic phase of GdF micro/ nanocrystals have been synthesized based on a hydrothermal method. For comparison, the sample was also synthesized by a co-precipitation method. The samples were characterized by X-ray diffraction (XRD) patterns, field emission scanning electron microscopy (FE-SEM) images, energy-dispersive spectroscopy (EDS) spectra, and photoluminescence (PL) excitation and emission spectra. By host Gd sensitizing, the Eu presents relatively strong emissions. The energy transfers from host Gd to doping Eu are observed in all the samples and the energy transfer plays an important role in the emission of Eu. Acting as a probe, the Eu presents its distinct optical properties in the samples.

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