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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 |
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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 |
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