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- Title
Synthesis of BaAl<sub>2</sub>S<sub>4</sub>:Eu<sup>2+</sup> Electroluminescent Material by the Polymerizable Complex Method Combined with CS<sub>2</sub> Sulfurization.
- Authors
Petrykin, Valery; Kakihana, Masato
- Abstract
Eu-activated BaAl2S4 (BaAl2S4:Eu) blue light emission phosphor has attracted considerable attention recently as a prospective material for full color electroluminescent display applications. Although BaAl2S4:Eu was discovered over 30 years ago, the solid-state reaction between metal sulfides in sealed quartz ampoules remains the main method for the synthesis of this material. In this work, a homogeneous single-phase Ba0.95Eu0.05Al2S4 (BaAl2S4:Eu) phosphor was obtained by the sulfurization–reduction of the multicomponent oxide precursor in a CS2 atmosphere at 1050°C. The oxide precursor containing barium, aluminum, and europium for this process was prepared by the polymerizable complex method, which ensures a high degree of homogeneity in the final product. The BaAl2S4:Eu material thus obtained exhibited a single emission line at 475 nm and a fluorescence intensity of 35% compared with one of the best commercially available (Ba,Eu)MgAl10O17 phosphors.
- Subjects
ELECTROLUMINESCENCE; INFORMATION display systems; ELECTROLUMINESCENT devices; HOMOGENEITY; FLUORESCENCE; LIGHT transmission; EUROPIUM; PHOSPHORS; METAL sulfides
- Publication
Journal of the American Ceramic Society, 2009, Vol 92, pS27
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2008.02740.x