Y2SiO5:Tb phosphor particles prepared from colloidal and aqueous solutions by spray pyrolysis

H. S. Kang, Yun Chan Kang, H. D. Park, Y. G. Shul

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Green-emitting Y2SiO5:Tb phosphor particles with fine size, spherical shape, filled morphology, high crystallinity, and good brightness were synthesized by a spray pyrolysis process. The effect of silicon precursor type on the morphology, crystal structure, crystallinity, and photoluminescence efficiency of Y2SiO5:Tb phosphor particles was investigated. The particles prepared from an artificial colloidal solution obtained by dispersing fumed silica particles had a pure monoclinic X2 crystalline phase, which is more appropriate for application to displays, after post-treatment at 1300°C. On the other hand, the particles prepared from 100% tetraethyl orthosilicate (TEOS) reagent had an X2 phase and small amounts of X1 and impurity phases such as Y2Si2O7 and Y4.67Si3O13 due to the phase-segregation characteristics of the TEOS precursor. The photoluminescence characteristics of Y2SiO5:Tb phosphor particles were strongly affected by the silicon source used. The photoluminescence intensities increased with the fumed silica/TEOS ratio. The particles prepared from 100% fumed silica showed the maximum photoluminescence intensity, which is 22% higher than that of particles prepared from 100% TEOS.

Original languageEnglish
Pages (from-to)347-351
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1
Externally publishedYes

Fingerprint

Spray pyrolysis
Phosphors
Photoluminescence
Silicon Dioxide
Silica
Silicon
Luminance
Crystal structure
Display devices
Impurities
Crystalline materials
tetraethoxysilane

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

Cite this

Y2SiO5:Tb phosphor particles prepared from colloidal and aqueous solutions by spray pyrolysis. / Kang, H. S.; Kang, Yun Chan; Park, H. D.; Shul, Y. G.

In: Applied Physics A: Materials Science and Processing, Vol. 80, No. 2, 01.02.2005, p. 347-351.

Research output: Contribution to journalArticle

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