Journal
JOURNAL OF LUMINESCENCE
Volume 129, Issue 8, Pages 840-843Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2009.03.007
Keywords
KGd1-x(WO4)(2-y)(MoO4)(y):Eu-x(3+); UV-VUV; Photoluminescence
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Funding
- Ministry of Education and Guangdong Province [0712226100023]
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KGd1-x(WO4)(2-y)(MoO4)(y):Eu-x(3+)(0.1 <= x <= 0.75, y = 0 and 0.2) phosphors are synthesized through traditional solid-state reaction and their luminescent properties in ultraviolet (UV) and vacuum ultraviolet (VUV) regions are investigated. Under 147nm excitation, these phosphors show characteristic red emission with good color purity. In order to improve their emission intensity, the MoO42- (20wt%) is introduced into the anion of KGd1-x(WO4):EUx3+. The Mo6+ and Eu3+ co-doped 4 KGd(WO4)(2) phosphors show higher emission intensity in comparison with the singly Eu3+-doped KGd(WO4)(2) in VUV region. The chromaticity coordination of KGd0.45(WO4):EU0.553+ is (x = 0.669, y = 0.331), while that of KGd0.45(WO4)(1.8)(MoO4)(0.2):Eu-0.55(3+) is (x = 0.666, y = 0.334) in VUV region. (C) 2009 Elsevier B.V. All rights reserved.
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