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Materials 2010, 3(4), 2506-2515; doi:10.3390/ma3042506
Article

Synthesis of Green-Emitting (La,Gd)OBr:Tb3+ Phosphors

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Received: 29 December 2009 / Revised: 12 March 2010 / Accepted: 31 March 2010 / Published: 1 April 2010
(This article belongs to the Special Issue Luminescent Materials)
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Abstract

Green-emitting phosphors based on lanthanum-gadolinium oxybromide were synthesized in a single phase form by the conventional solid state reaction method, and photoluminescence properties of them were characterized. The excitation peak wavelength of (La1-xGdx)OBr:Tb3+ shifted to the shorter wavelength side with the increase in the crystal field around the Tb3+ ions by doping Gd3+ ions into the La3+ site, and, as a result, the green emission intensity was successfully enhanced. The maximum emission intensity was obtained for (La0.95Gd0.05)OBr:5%Tb3+, where the relative emission intensity was 45% of that of a commercial green-emitting LaPO4:Ce3+,Tb3+ phosphor.
Keywords: green-emitting phosphor; rare earth oxybromide; crystal field modification; solid state reaction green-emitting phosphor; rare earth oxybromide; crystal field modification; solid state reaction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kim, S.W.; Jyoko, K.; Masui, T.; Imanaka, N. Synthesis of Green-Emitting (La,Gd)OBr:Tb3+ Phosphors. Materials 2010, 3, 2506-2515.

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