Green light-emitting Lu 3Al 5O 12:Ce phosphor powders prepared by spray pyrolysis

Hyung Tae Kim, Jung Hyun Kim, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Green light-emitting Lu 2.985Al 5O 12:Ce 0.015 (LuAG:Ce) phosphor powders are prepared by spray pyrolysis. The only crystallized phase in the precursor powders and post-treated powders at temperatures below 800°C is Lu 2O 3 and the other components are amorphous. Phase pure cubic garnet LuAG:Ce phosphor powders are obtained by post-treatment at 1000°C. Phosphor powders post-treated at temperatures below 1400°C retain the spherical shape of the precursor powders. The mean crystallite sizes of phosphor powders post-treated at 1200, 1400, and 1500°C are 30, 46, and 54 nm, respectively. The excitation spectra contain two bands: a weak band with the maximum peak at 345 nm and a strong broad band in the spectral range from 400 to 490 nm with the maximum peak at 455 nm. The LuAG:Ce phosphor powders have broad emission spectra between 480 and 600 nm, with the maximum peak intensity located at 507 nm. The photoluminescence intensity of the phosphor powders post-treated at 1400°C is 84.2% of that of the powders post-treated at 1500°C.

Original languageEnglish
Pages (from-to)1428-1431
Number of pages4
JournalMaterials Research Bulletin
Volume47
Issue number6
DOIs
Publication statusPublished - 2012 Jun

Keywords

  • A. Optical materials
  • B. Chemical synthesis
  • D. Optical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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