Study of the cation distributions in Eu doped Sr{sub 2}Y{sub 8}(SiO{sub 4}){sub 6}O{sub 2} by X-ray diffraction and photoluminescent spectra

Journal Article · Tue Dec 14 23:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.10.025· OSTI ID:21494166

Shen, Yiqiang ^[1]; Chen, Rui ^[2]; Xiao, Fen ^[2]; Sun, Handong ^[2]; Tok, Alfred ^[1]; Dong, Zhili ^[1]

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1. School of Materials Science and Engineering, Nanyang Technological University, Block N4.1 Level 1, 50 Nanyang Avenue, Singapore 639798 (Singapore)
2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

The crystal structure and photoluminescent properties of europium doped silicate Sr{sub 2}Y{sub 8}(SiO{sub 4}){sub 6}O{sub 2}:Eu{sup 3+} are reported. The Sr{sub 2}Y{sub 8-x}Eu{sub x}(SiO{sub 4}){sub 6}O{sub 2} compounds have typical apatite crystal structures with the P6{sub 3}/m space group. The distributions of Eu{sup 3+} between the two crystallographic sites 4f and 6h in the apatite structure are investigated by the powder X-ray diffraction and Rietveld refinement. Results show that Eu{sup 3+} ions only occupy the 4f sites when the Eu doping concentration is low (x=0-0.5 in Sr{sub 2}Y{sub 8-x}Eu{sub x}(SiO{sub 4}){sub 6}O{sub 2}). However, in higher concentrations, Eu{sup 3+} ions begin to enter the 6h sites as well. The distributions of the Eu{sup 3+} are also reflected in photoluminescent spectra. The CIE coordinates for Sr{sub 2}Y{sub 6}Eu{sub 2}(SiO{sub 4}){sub 6}O{sub 2} are (0.63, 0.37), which is close to the pure red color. -- Graphical abstract: The crystal structures of Eu doped Sr{sub 2}Y{sub 8}(SiO{sub 4}){sub 6}O{sub 2} especially the distributions of Eu{sup 3+} cations between 4f and 6h sites were studied by X-ray diffraction, Rietveld refinement and photoluminescent spectra. Display Omitted

• OSTI ID: 21494166
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 12 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
APATITES
CATIONS
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DIFFRACTION
DOPED MATERIALS
EMISSION
EUROPIUM COMPOUNDS
EUROPIUM IONS
HEXAGONAL LATTICES
IONS
LUMINESCENCE
MATERIALS
MINERALS
OXYGEN COMPOUNDS
PHOSPHATE MINERALS
PHOTOLUMINESCENCE
PHOTON EMISSION
RARE EARTH COMPOUNDS
SCATTERING
SILICATES
SILICON COMPOUNDS
SPACE GROUPS
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM SILICATES
SYMMETRY GROUPS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM SILICATES