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Synthesis of BaAl 2 S 4 :Eu 2+ Electroluminescent Material by the Polymerizable Complex Method Combined with CS 2 Sulfurization
Author(s) -
Petrykin Valery,
Kakihana Masato
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02740.x
Subject(s) - phosphor , europium , materials science , electroluminescence , oxide , barium , analytical chemistry (journal) , reducing atmosphere , luminescence , mineralogy , inorganic chemistry , chemistry , nanotechnology , metallurgy , optoelectronics , layer (electronics) , chromatography
Eu‐activated BaAl 2 S 4 (BaAl 2 S 4 :Eu) blue light emission phosphor has attracted considerable attention recently as a prospective material for full color electroluminescent display applications. Although BaAl 2 S 4 :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 Ba 0.95 Eu 0.05 Al 2 S 4 (BaAl 2 S 4 :Eu) phosphor was obtained by the sulfurization–reduction of the multicomponent oxide precursor in a CS 2 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 BaAl 2 S 4 :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)MgAl 10 O 17 phosphors.