한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

Morphology and Photoluminescence Characteristics of Halophosphate Phosphor Particles by Spray Pyrolysis and Flame Spray Pyrolysis

  • Sohn, Jong-Rak (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kang, Yun-Chan (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park, Hee-Dong (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Yoon, Soon-Gil (Dept. of Materials Engineering, Chungnam National Univ.)
  • Published : 2002.08.21
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Abstract

Flame spray pyrolysis was applied to improve the photoluminescence characteristics of blue-emitting $Sr_5(PO_4)_3Cl:Eu^{2+}$ phosphor particles with high brightness for the application to LED phosphor. $Sr_5(PO_4)_3Cl:Eu^{2+}$ prepared from conventional spray pyrolysis had poor PL intensity than that of commercial products under long-wavelength ultraviolet(UV). $Sr_5(PO_4)_3Cl:Eu^{2+}$ phosphor particles prepared by flame spray pyrolysis had PL intensity as same as that of commercial products under long-wavelength UV. Hollow morphology and porous structure of the particles prepared by the flame spray pyrolysis disappeared after posttreatment. Even though the $Sr_5(PO_4)_3Cl:Eu^{2+}$ phosphor particles prepared by the flame spray pyrolysis had irregular shape, the particles had dense structure and clear surface property.

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