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

Materials

Sun Woog Kim¹  Kazuya Jyoko¹  Toshiyuki Masui¹ 

[1] Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan;

关键词: green-emitting phosphor;    rare earth oxybromide;    crystal field modification;    solid state reaction;   

DOI  :  10.3390/ma3042506

来源: mdpi

【 摘 要 】

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 (La_1-xGd_x)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 (La_0.95Gd_0.05)OBr:5%Tb³⁺, where the relative emission intensity was 45% of that of a commercial green-emitting LaPO₄:Ce³⁺,Tb³⁺ phosphor.

【 授权许可】

CC BY   
© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.