Luminescence Characteristics of <TEX>${Y_2}{O_3}$</TEX>:Eu Phosphor Treated with <TEX>$alpha$</TEX>-<TEX>${Fe_2}{O_3}$</TEX>Prepared by Two Different Methods Using <TEX>$FeSO_4$</TEX>.<TEX>$7H_2$</TEX>O

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J. Korean Ceram. Soc. > Volume 38(12); 2001 > Article

Journal of the Korean Ceramic Society 2001;38(12): 1115.

$FeSO_4$.$7H_2$O를 이용하여 서로 다른 방법으로 만들어진 $alpha$-${Fe_2}{O_3}$를 표면처리한 ${Y_2}{O_3}$:Eu 적색 형광체의 발광 특성

김봉철, 이춘엽¹, 송윤호, 서경수, 이진호, 이남양², 김동국³, 박이순⁴, 이병교⁵

전자통신연구원 FED 소자팀
¹오리온전기 PDP 연구팀
²LG. Philips LCD LCD연구소
³경북대학교 화학과
⁴경북대학교 고분자공학과
⁵경북대학교 무기재료공학과

Luminescence Characteristics of ${Y_2}{O_3}$:Eu Phosphor Treated with $alpha$-${Fe_2}{O_3}$Prepared by Two Different Methods Using $FeSO_4$.$7H_2$O

ABSTRACT

The tendency of the miximum brightness of $Y_2$O$_3$:Eu phosphor with various activator concentration, by different surface treatment methods as well as different exciting energies were investigated. The surface treatment methods were the adsorption method used $alpha$-Fe$_2$O$_3$powder prepared emulsion-drying process and the precipitation method used FeSO$_4$/ethanol. Eu concentration of maximum brightness of $Y_2$O$_3$:Eu phosphor prepared by solid-solid state was changed with various exciting energies. The concentrations were 0.02 mol at VUV(147 nm) as well as 400 V and 0.03 mol at 5 kV. The phosphor treated both by adsorption method and precipitation method showed decreasing luminescent intensity with increasing amount of $alpha$-Fe$_2$O$_3$, and the methods are chosen by exciting energy. Adsorption method was effective in a low voltage and VUV(147nm) region, and precipitation method was effective in the high voltage region.

Key words: Pigment, ${Y_2}{O_3}$, Eu, Phosphor, Contrast, Color purity