SrAl2O4:Eu+2,Dy+3 장잔광 형광체 합성에 있어서 알루미늄 화합물에 따른 열적거동 및 발광특성 변화

이영기; 이유기; Young-Ki Lee; You-Kee Lee

Korean Journal of Materials Research, Vol.17, No.11, 612-617, November, 2007

DOI10.3740/MRSK.2007.17.11.612 Export Citation

SrAl2O4:Eu+2,Dy+3 장잔광 형광체 합성에 있어서 알루미늄 화합물에 따른 열적거동 및 발광특성 변화

Photoluminescence and Thermal Characteristics of SrAl2O4:Eu+2, Dy+3 Phosphors Synthesized with Various Aluminum Compounds

이영기, 이유기^†

위덕대학교 반도체전자공학부

Young-Ki Lee, and You-Kee Lee^†

Division of Semiconductor Engineering, Uiduk University, Kyongju 780-910, Korea

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Both photoluminescence and thermal characteristics for SrAl2O4:Eu+2,Dy+3 phosphors synthesized with various aluminum compounds (α-Al2O3, γ-Al2O3, amorphous-Al2O3 and Al(OH)3) were investigated in this study. The formation temperature of the host SrAl2O4 crystal is changed by these various aluminum compounds, as a result of the different thermal decomposition temperature of SrCO3 phase. Among these compounds, the amorphous-Al2O3 phase shows the lowest formation temperature of the host SrAl2O4 crystal. The PL emission and excitation spectra of SrAl2O4:Eu+2, Dy+3 phosphor are not affected by these aluminum compounds. After the removal of the Xenon lamp excitation (360 nm), however, the excellent longphosphorescent property of the phosphor is obtained by the amorphous-Al2O3 phase, although the decay time for all phosphors decrease exponentially.

Keywords:SrAl2O4:Eu+2;Dy+3 Phosphor;Aluminum compound;Photoluminescence;Thermal characteristics

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[14] Lee YK, Research Report, (Uiduk university) (1999)