Improvement in morphology and photoluminescence intensity under vacuum ultraviolet excitation of (Y, Gd)BO3:Eu red phosphor particles prepared by spray pyrolysis

Kyeong Youl Jung, Eun Joung Kim, Yun Chan Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

High-luminescent (Y,Gd)BO3:Eu red phosphor particles were synthesized by spray pyrolysis and the morphology of these particles was improved by controlling the precursor solution to be sprayed. An investigation was also conducted into the effects that several codopants (In, Dy, Sm, Tm, and Pr) have on the photoluminescence intensity of (Y,Gd)BO3:Eu particles under vacuum ultraviolet excitation. It was found that modifying the spray solution with NH4OH improved the morphology of phosphor particles obtained after heat treatment. As a result, the rod-shaped (Y,Gd)BO 3:Eu particles obtained from the nitrate precursor solution in the spray pyrolysis were almost spherical. By varying the heat treatment temperature from 900 to 1200°C, the optimal temperature was found to be 1050°C in terms of the luminescence efficiency and morphology of the (Y,Gd)BO 3:Eu particles prepared from the NH4OH-modified precursor solution. Of the several codopants used, indium was the most effective at improving the photoluminescence intensity of (Y,Gd)0.95BO 3:Eu0.05,Mx particles under vacuum ultraviolet excitation. Finally, the highest photoluminescence intensity was obtained when the indium content (x) was 0.001. The optimized (Y,Gd)95BO 3:Eu0.05,In0.001 particles show a 6% higher luminescence intensity than do the commercial particles.

Original languageEnglish
Pages (from-to)280-286
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume11
Issue number2
Publication statusPublished - 2005 Mar
Externally publishedYes

Keywords

  • Borate
  • Luminescence
  • PDP
  • Phosphor
  • Spray pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)

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