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Synthesis, characterization and luminescent properties of needle-like lanthanide-doped orthorhombic Y5O4F7

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Guo,  K.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zhang,  H.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Liu, B. Q., Liu, L. S., Guo, K., Wang, J., Zhu, L. L., Zhang, H., et al. (2013). Synthesis, characterization and luminescent properties of needle-like lanthanide-doped orthorhombic Y5O4F7. Journal of Rare Earths, 31(8), 745-749. doi:10.1016/S1002-0721(12)60352-4.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-1E6C-E
Abstract
Thermal annealing of YOH1.1F1.9 and YOH1.1F1.9:Ln(3+) (Ln(3+)=Eu3+, Tb3+ and Gd3+) precursors in air gave access to synthesize yttrium oxyfluoride phosphors with well-preserved needle-like morphologies. The phase purities of samples strongly depended on the thermal annealing temperature. At 600 degrees C, pure Y5O4F7 with orthorhombic structure were obtained, as evidenced by powder X-ray diffraction measurement and chemical analysis. The interesting microstructure evolution. of the annealed sample from well-organized nanoparticles on curly slices to microrod-bundle structure had been aroused by raising annealing temperature. The multicolor fluorescent emissions of Y5O4F7:Ln(3+) phosphors were observed, e.g. ultraviolet emission for Gd3+, green emission for Tb3+ and red emission for Eu3+, which resulted from characteristic transitions of different lanthanide ions.