Morphological control of Y2O3:Eu phosphor particles by adding polymeric precursors in spray pyrolysis

Jong Rak Sohn, Yun Chan Kang, Hee Dong Park

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

The Y2O3:Eu phosphor particles having a spherical shape and dense morphology were prepared by a pilot-scale spray pyrolysis process which involved the introduction of polymeric precursors in the spray solution. The Y2O3:Eu particles prepared from the solution without polymeric precursors had a hollow and fractured structures. However, the particles prepared from the solutions with citric acid and ethylene glycol had a completely spherical shape and dense morphology. The polymeric chains formed from the esterification reaction between carboxyl and alcohol groups changed the drying and decomposition stages of the droplets. The ratio of citric acid, ethylene glycol and their concentrations were critical factors in the control of the morphology of the Y2O3:Eu phosphor particles. The mean crystallite sizes of the particles prepared from solutions with and without citric acid and ethylene glycol were 49 nm and 33 nm, respectively. The maximum photoluminescence intensity of the particles prepared from the solution with suitable concentrations of citric acid and ethylene glycol was 125% of that of the particles prepared from the solution without polymeric precursors.

Original languageEnglish
Pages (from-to)3006-3009
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number5 A
Publication statusPublished - 2002 May
Externally publishedYes

Keywords

  • Display
  • Phosphor
  • Red phosphor
  • Spray pyrolysis
  • Yttrium oxide

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Morphological control of Y<sub>2</sub>O<sub>3</sub>:Eu phosphor particles by adding polymeric precursors in spray pyrolysis'. Together they form a unique fingerprint.

Cite this