Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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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

$SrAl_2O_4:Eu^{+2},\;Dy^{+3}$ 장잔광 형광체에 있어서 발광 및 장잔광특성에 미치는$B_2O_3$의 영향

  • 이영기 (위덕대학교 반도체전자공학부) ;
  • 엄기석 (위덕대학교 반도체전자공학부)
  • Published : 2004.06.01
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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.

융제(flux)로서 $B_2O_3$의 농도를 0-10 wt%까지 변화시킨 $SrAl_2O_4$ : $Eu^{+2}$, $Dy^{+3}$계 장잔광 형광체를 고상반응법으로 합성한 후, $B_2O_3$의 첨가량에 따른 결정특성과 장잔광 축광재료로서 가장 중요한 발광 및 장잔광 특성을 조사하였다. $SrAl_2O_4$ : Eu$^{+2}$, $Dy^{+3}$계 형광체는 $B_2O_3$의 농도에 관계없이 520nm 파장을 최대 발광파장으로 하는 발광스펙트럼을 나타내었고, 3wt%의 $B_2O_3$ 농도에서 최대 발광강도를 나타내었다. 그리고 $SrAl_2O_4$ : Eu$^{+2}$, $Dy^{+3}$ 형광체의 잔광강도 역시 $B_2O_3$의 농도에 무관하게 시간에 따라 모든 시료에서 지수 함수적으로 감소하였으나, $B_2O_3$의 농도가 3wt%인 경우에 발광의 감쇠속도가 작은 뛰어난 장잔광특성을 나타내었다.

Keywords

References

  1. Luminescence of inorganic solids P.Goldberg
  2. J. Electrochem. Soc. v.143 A new long phosphorescent phosphor with high brightness, SRAl₂O₄:$Eu^ {+2}$,$Dy^ {+3}$ T.Matsuzawa;Y.Aoki;N.Takeuchi;T.Murayama https://doi.org/10.1149/1.1837067
  3. J. Ceramic Soc. Japan v.104 Long-lasting afterglow characteristics of Eu, Dy codoped SrO-Al₂O₃ Phosphor H.Takasaki;S.Tanabe;T.Hanada https://doi.org/10.2109/jcersj.104.322
  4. Sov. Phys. Solid State v.33 Oxygen-tetrahedral AB₂O₄ crystals (A=Ba, Sr; B=Al, Ga): preparation, properties, and phase transition characteristics V.V.Zhurov;A.A.Bush;S.A.Ivanov;S.Yu.Stefanovich;B.N.Bomanov
  5. Mat. Res. Bull. v.25 no.11 Luminescence of $Eu ^{+2}$ in strontium aluminates prepared by the hydrothermal method T.R.N.Kutty;R.Jagannathan;R.P.Rao https://doi.org/10.1016/0025-5408(90)90217-P
  6. J. Electrochen. Soc. v.144 Effects of composition on the long phosphorescent SrAl₂O₄:$Eu^ {+2}$,$Dy^ {+3}$ phosphor crystal T.Katsumata;T.Nabae;K.Sasajima;S.Komuro;T.Morikawa https://doi.org/10.1149/1.1837931
  7. J. Electrochem. Soc. v.115 Fluorescent properties of alkaline earth aluminates of the ype MAl₂O₃ activated by divalent europium F.C.Palilla;A.K.Levine;M.R.Tomkus https://doi.org/10.1149/1.2411379
  8. J. Electrochem. Soc. v.118 optical and electrical properties of SrAl₂O₄:$Eu^ {+2}$ V.Abbnuscato https://doi.org/10.1149/1.2408226