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Effects of $ B_2O_3$ composition for the photoluminescence and after-glow charcteristics of $SrAl_2O_4:Eu^{+2},\;Dy^{+3}$ phosphors  

이영기 (위덕대학교 반도체전자공학부)
엄기석 (위덕대학교 반도체전자공학부)
Abstract
Both photoluminescence and the long-phosphorescent properties for $SrAl_2O_4$ : Eu$^{+2}$, $Dy^{+3}$ phosphor powder synthesized by the solid phase reaction were investigated as a function of $B_2O_3$ composition (0-10 wt%). The highest emission wavelength (520nm) of photoluminescence spectra was not affected by $B_2O_3$concentration. The highest emission intensity was obtained by the concentration of 3 wt% $B_2O_3$.After the removal of the Xenon lamp excitation (360nm), also, the excellent long-phosphorescent property of the phosphors was obtained by the concentration of 3 wt% $B_2O_3$ although the decay times for all phosphors decreased exponentially.
Keywords
SrAl$_2$O$_4$ : Eu$^{}$ +2/; Dy$^{}$ +3/ phosphor; Solid phase reaction; Flux; B$_2$O$_3$; Photoluminescence; Emission wavelength; Long-phosphorescent; Decay time;
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