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

• Published in: Journal of luminescence Vol. 134; pp. 227 - 231
• Main Authors: Xia, Zhiguo, Liao, Libing, Xiong, Ming, Li, Guowu
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2013; Elsevier
• Subjects: 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; Optical properties; Optical materials; Europium additions; Temperature dependence; Wide band; Chemical preparation; Photoluminescence; Doped materials; Lattice parameters; Bromosilicates; Luminescence decay; Crystal structure
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2012.08.041

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.