Eu-doped Ca8Mg(SiO4)4Cl2 phosphor particles prepared by spray pyrolysis from the colloidal spray solution containing ammonium chloride

Hye Young Koo, Seung Kwon Hong, Jin Man Han, Yun Chan Kang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The green-emitting Ca8Mg(SiO4)4Cl2:Eu2+ phosphor particles were prepared by spray pyrolysis from the colloidal spray solution that contained fumed silica and ammonium chloride. The ammonium chloride was used as the source of chlorine and the flux material. The ratios of the calcium and chlorine components that were dissolved into the spray solution were changed from 1:0.25 to 1:2.5. The phosphor particles prepared from the spray solution with the proper amount of ammonium chloride added to the spray solution had fine sizes and regular morphologies. The phase-pure Ca8Mg(SiO4)4Cl2:Eu2+ phosphor particles were obtained from the spray solution that had a ratio of calcium to chlorine components in the range of 1:0.5 to 1:1.5. The post-treated phosphor particles had a broad excitation wavelength that ranged from 260 to 480 nm, irrespective of the amount of ammonium chloride added to the spray solution. The phosphor particles prepared from the spray solution with a 1:1 ratio of calcium to chlorine had maximum emission intensity under a long-wavelength ultraviolet.

Original languageEnglish
Pages (from-to)429-434
Number of pages6
JournalJournal of Alloys and Compounds
Volume457
Issue number1-2
DOIs
Publication statusPublished - 2008 Jun 12
Externally publishedYes

Keywords

  • Chemical synthesis
  • Optical materials
  • Optical properties

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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