Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Spherical-shape Y2SiO5:Ce Phosphor Prepared from Organic Precursor Solution by Spray Pyrolysis

고분자 전구체 용액으로부터 분무열분해법에 의해 합성되어진 구형 형상의 Y2SiO5:Ce 형광체

  • Kang, H.S. (Department of Chemical Engineering, Yonsei University) ;
  • Kang, Y.C. (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park, H.D. (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Shul, Y.G. (Department of Chemical Engineering, Yonsei University)
  • 강희상 (연세대학교 화학공학과) ;
  • 강윤찬 (한국화학연구원 화학소재부) ;
  • 박희동 (한국화학연구원 화학소재부) ;
  • 설용건 (연세대학교 화학공학과)
  • Published : 2003.03.01
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Abstract

Ce-doped $Y_2$SiO$_{5}$ phosphor particles of spherical morphology, fine size, high crystallinity and high photoluminescence (PL) intensity were prepared by spray pyrolysis. When nitrate precursor solution is adopted, hollow particles were formed by uneven drying rate between surface and inside of droplet. Citric acid and ethylene glycol were introduced as polymeric precursor to control the morphology of particles. When polymeric solution is adopted, polymeric chain is formed by the esterification reaction between carboxyl and hydroxy groups of citric acid and ethylene glycol, and considered as controlling the drying characteristics of droplet. $Y_2$$SiO_{5}$ :Ce phosphor particles prepared from polymeric precursor solution were spherical, filled, fine size and not agglomerate before and after post heat treatment. The optimum doping concentration of cerium was 0.5 mol% of overall solution concentration. The optimum amount of TBOS of high PL intensity and pure crystallinity of X2-type $Y_2$$SiO _{5}$ was 105% of stoichiometric amount. The PL intensity of $Y_2$X$/_{5}$ :Ce phosphor particles prepared using the polymeric precursor solution was 164% of that of the nitrate precursor solution due to homogeneous composition and good morphology.y.

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References

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