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http://dx.doi.org/10.12925/jkocs.2002.19.3.4

Optical and Long After-Glow Characteristics of $Eu^{2+}$, $Nd^{3+}$ doped $BaAl_{2}O_{4}$ Phosphorescent Crystals  

Kim, Jeong-Hwan (Dept. of Industrial Chemical Engineering Chungbuk National University)
Kim, Byung-Gyu (Korea Institute of Geoscience and Mineral Resources)
Lee, Dong-Kyu (Dept. of Industrial Chemical Engineering Chungbuk National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.19, no.3, 2002 , pp. 174-180 More about this Journal
Abstract
In recent days, the study of a new phosphorescent phosphor has been performed in order to overcome the defect of sulfide phosphor and increase the brightness and long after-glow characteristic of phosphorescent phosphor. Particularly, sulfide phosphor usually used is so chemically unstable that the study of oxide phosphors are processing. $Eu^{2+}$, $Nd^{3+}$ doped Ba-Al-O phosphors sintered at $600{\sim}1500^{\circ}C$ for 2hours had the PL emission spectrum and after-glow over $1200^{\circ}C$. In this system, as the mole concentration of alumina increases, emission bands of phosphors moved from 500nm to 380nm. The optimum concentration of flux was 5wt% and after-glow characteristics of phosphors were found at the host material molar ratio ($BaCO_{3}:Al_{2}O_{3}$), 1:1 and 1:3.
Keywords
phosphors; photoluminescence$BaAl_{2}O_{4}$; rare-earth metals; trap;
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