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http://dx.doi.org/10.5012/jkcs.2002.46.4.336

Screening of Eu3+-and Tb3+-Activated Phosphors for PDP in the System of CaO-Gd2O3-Al2O3  

Park, Sang-Mi (Advanced Material Division, Korea Research Institute of Chemical Technology)
Kim, Chang-Hae (Advanced Material Division, Korea Research Institute of Chemical Technology)
Park, Hui-Dong (Advanced Material Division, Korea Research Institute of Chemical Technology)
Jang, Ho-Gyeom (Chemistry, Korea University)
Park, Jun-Taek (Department of Chemistry, Korea Advanced Institute of Science and Technology)
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Abstract
In this study, we have screened $Eu^{3+}$- and $Tb^{3+}$-activated candidate phosphors for PDP in the sys-tems of CaO-Gd$_2$O$_3$-Al$_2$O$_3$ by combinatorial chemistry and investigated the synthetic temperature, optimum com-position and luminescent properties about the candidate phosphors. To construct the emission intensity library by VUV PL, we have synthesized 210 different compositional samples using a polymerized-complex method. Good luminescent samples were identified by X-ray diffraction method. $Ca_$\alpha$$G$d_{0.95-$\alpha$-$\beta$}Al_$\beta$O_$\delta$$ : Eu(0.02< $\alpha$+$\beta$ <0.04) phos-phors screened as a red phosphor have good color purity than commercial phosphor. In the candidate phosphors of CaGdAl$_3O_7$ : Tb, Ca$Al_{12}O_{19}$ : Tb, Gd$_4$Al$_2O_9$ : Tb, and Gd$_3Al_5O_{12}$ : Tb CaGdAl$_3O_7$ : Tb, and Ca$Al_{12}O_{19}$ : Tb have shorter decay time than commercial phosphor.
Keywords
Phosphor; Compbinatorial Chemistry; Polymerized-Complex Method; Plasma Display Panels;
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