Crystal structure of Eu{sup 2+}-doped M{sub 3}MgSi{sub 2}O{sub 8} (M: Ba, Sr, Ca) compounds and their emission properties
Journal Article
·
· Journal of Solid State Chemistry
- Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, Miyamae 7-32, Kofu 400-8511 (Japan)
Emission properties of Eu{sup 2+}-doped M{sub 3}MgSi{sub 2}O{sub 8} (M: Ba, Sr, Ca) are discussed in terms of the crystal structure. When Ba{sup 2+} ions account for over one third of M{sup 2+} ions, M{sub 3}MgSi{sub 2}O{sub 8} crystallizes in glaserite-type trigonal structure, while Ba-free compounds crystallize in merwinite-type monoclinic structure. Under UV excitation, the Eu{sup 2+}-doped glaserite-type compounds exhibit an intense blue emission assigned to 5d-4f electron transition at about 435 nm, regardless of the molar ratio of Ba{sup 2+}, Sr{sup 2+} and Ca{sup 2+} ions. By contrast, the Eu{sup 2+}-doped merwinite-type compounds show an emission color sensitive to the ratio. A detailed analysis of the emission spectra reveals that the emission chromaticity for the Eu{sup 2+}-doped M{sub 3}MgSi{sub 2}O{sub 8} is composed of two emission peaks reflecting two different sites accommodating M{sup 2+} ion. - Graphical abstract: Structure of glaserite-type M{sub 3}MgSi{sub 2}O{sub 8} illustrated with MgO{sub 6} octahedra and SiO{sub 4} tetrahedra.
- OSTI ID:
- 21212227
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 3 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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