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Screening of Eu<sup>3+</sup>-and Tb<sup>3+</sup>-Activated Phosphors for PDP in the System of CaO-Gd<sub>2</sub>O<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>
Screening of Eu3+-and Tb3+-Activated Phosphors for PDP in the System of CaO-Gd2O3-Al2O3
Journal of the Korean Chemical Society. 2002. Aug, 46(4): 336-345
  • Published : August 20, 2002
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Park, Sang-Mi
Kim, Chang-Hae
Park, Hui-Dong
Jang, Ho-Gyeom
Park, Jun-Taek

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.
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