Structural consideration on the emission properties of Eu²⁺-doped Ba(Sr, Ca)₂MgSi₂O₈
- Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Miyamae 7-32, Kofu 400-8511 (Japan)
Emission properties of Eu²⁺-doped Ba(Sr, Ca)₂MgSi₂O₈ are discussed in terms of the crystal structure refined by Rietveld method. Ba(Sr, Ca)₂MgSi₂O₈ has glaserite-type layered structure. In response to Sr/(Sr+Ca) ratio, the layer-framework build up by corner-sharing of MgO₆ octahedra and SiO₄ tetrahedra twists around C₃ axes to match the size of B-site cation (Sr²⁺/Ca²⁺). This twist significantly affects the unit cell size and the coordination environment around B-site. Eu²⁺-doped Ba(Sr, Ca)₂MgSi₂O₈ exhibited blue emission under ultraviolet irradiation. The emission spectra have been characterized by two emission components derived from Eu²⁺ ions occupying A- and B-site. Both components showed similar wavelength shift for different Sr/(Sr+Ca), in response to Si–O₁ polarization and to the structural change. - Graphical abstract: Emission properties of Eu²⁺-doped Ba(Sr, Ca)₂MgSi₂O₈ are discussed in terms of the crystal structure refined by Rietveld method. Highlights: • Glaserite-type Ba(Sr, Ca)₂MgS₂O₈ has been prepared by a solid state reaction. • Ba(Sr, Ca)₂MgSi₂O₈ changes the crystal structure, depending on Sr/(Sr+Ca) ratio. • Eu²⁺-doped Ba(Sr, Ca)₂MgSi₂O₈ exhibits blue emission under ultraviolet irradiation. • Emission from Ba(Sr, Ca)₂MgSi₂O₈ is characterized by two Eu²⁺ emission components. • The two emissions show wavelength shift in a similar manner against Sr/(Sr+Ca)
- OSTI ID:
- 22306303
- Journal Information:
- Journal of Solid State Chemistry, Vol. 201; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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