Synthesis, structure and Eu2+-doped luminescence properties of bromosilicate compound Ca3SiO4Br2

The bromosilicate Ca3SiO4Br2 crystal has been grown, and this compound crystallizes in triclinic symmetry, space group P-1 (No. 2), with unit cell parameters: a=8.0051(18)Å, b=8.720(3)Å, c=11.749(3)Å, α=69.07(0)°, β=89.98(0)°, γ=75.46(0)°, and cell volume V=737.88(196)Å3, Z=3. The unit cell of the C...

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Veröffentlicht in:	Journal of luminescence 2013-02, Vol.134, p.227-231
Hauptverfasser:	Xia, Zhiguo, Liao, Libing, Xiong, Ming, Li, Guowu
Format:	Artikel
Sprache:	eng
Schlagworte:	Asymmetry Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Crystallization Crystals Decay Emission Exact sciences and technology Fundamental areas of phenomenology (including applications) Inorganic compounds Luminescence Optical materials Optical properties Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optics Other solid inorganic materials Photoluminescence Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Unit cell Wavelengths
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Zusammenfassung:	The bromosilicate Ca3SiO4Br2 crystal has been grown, and this compound crystallizes in triclinic symmetry, space group P-1 (No. 2), with unit cell parameters: a=8.0051(18)Å, b=8.720(3)Å, c=11.749(3)Å, α=69.07(0)°, β=89.98(0)°, γ=75.46(0)°, and cell volume V=737.88(196)Å3, Z=3. The unit cell of the Ca3SiO4Br2 crystal is composed of the alternating layers of CaBr2 and Ca2SiO4, therefore, the luminescence of Ca3SiO4Br2:Eu2+ gives a broad emission band centered at 469nm with some asymmetry on the long wavelength side with different coordination environment. Their detailed photoluminescence (PL) properties, PL decay curves and the temperature dependent PL behavior were also discussed. ► The Ca3SiO4Br2 crystal has been grown and the structure has been analyzed. ► Ca3SiO4Br2:Eu2+ gives a blue emission band centered at 469nm. ► PL decay curves and the temperature dependent PL behavior of Ca3SiO4Br2:Eu2+ have been discussed.
ISSN:	0022-2313 1872-7883
DOI:	10.1016/j.jlumin.2012.08.041