Green-emitting silicate phosphor under long wavelength ultraviolet prepared by high temperature flame spray pyrolysis

Jung Sang Cho, Hye Young Koo, Sang Ho Lee, Yun Chan Kang

Research output: Contribution to journalArticle

Abstract

Green-emitting Ba1.468Sr0.5SiO4: Eu0.12,Y0.02 phosphor powders under long-wavelength ultraviolet light were prepared via high-temperature flame spray pyrolysis from spray solutions with and without NH4Cl flux. The effects of the temperature of the diffusion flame and the NH4Cl flux on the morphologies, crystal structures and photoluminescence intensities of the Ba1.468 Sr0.5SiO4:Eu0.012,Y0.02 phosphor powders were investigated. The phosphor powders obtained from the spray solution with the NH4C1 flux had higher photoluminescence intensities compared to phosphor powders obtained from the spray solution without the flux. The photoluminescence intensity of the phosphor powders obtained from the spray solution without the flux decreased as the flow rate of the fuel gas increased. On the other hand, the photoluminescence intensity of the phosphor powders obtained from the spray solution with the flux increased as the flow rate of the fuel gas increased. The difference of in the phase purity and morphology of the powders affected the photoluminescence intensities of the phosphor powders.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalKorean Journal of Materials Research
Volume18
Issue number2
DOIs
Publication statusPublished - 2008 Feb 1

Keywords

  • Flame spray pyrolysis
  • Flux material
  • Light emitting diode
  • Phosphor

ASJC Scopus subject areas

  • Materials Science(all)

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