Effect of boric acid flux and drying control chemical additive on the characteristics of y2O3:Eu phosphor particles prepared by spray pyrolysis

Hye Young Koo, Seo Hee Ju, Seung Kwon Hong, Dae Soo Jung, Yun Chan Kang, Kyeong Youl Jung

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8 Citations (Scopus)


Y2O3:Eu phosphor particles with a spherical shape, a fine size, and high brightness under vacuum ultraviolet (VUV) illumination were prepared by spray pyrolysis. The polymeric precursors were needed to modify the spray solution to prepare spherical particles. The use of only flux with the polymeric precursors did not produce dense and spherical Y2O 3: Eu particles; that is, the produced particles were very porous. The addition of both a drying control chemical additive (DCCA) and boric acid to a spray solution containing polymeric precursors was found to produce Y 2O3: Eu phosphor particles with a dense structure while maintaining the spherical morphology. According to X-ray diffraction (XRD) analysis, the DCCA induced an enhancement of crystallinity. The use of boric acid flux improved the photoluminescence (PL) intensity under VUV illumination. In addition, the use of both boric acid flux and a DCCA with polymeric precursors further improved the PL intensity owing to the enhancement of the morphology and the crystallinity.

Original languageEnglish
Pages (from-to)9083-9087
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number12
Publication statusPublished - 2006 Dec 15
Externally publishedYes


  • Phosphor
  • Photoluminescence
  • Spray pyrolysis

ASJC Scopus subject areas

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


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