Luminescence properties of Ca(Y 0915-xGd x Al 0.025Eu 0.06)BO 4 phosphors under VUV irradiation

K. Park, J. K. Lee, Y. Kwon, S. J. Kim, S. Nahm

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The major phase of post-treated Ca(Y 0915-xGd x Al 0.025Eu 0.06)BO 4 (0 ≤ x ≤ 0.3) phosphors was solid solutions of the constituent oxides, which had an orthorhombic warwickite-like structure. The calculated crystallite size of the Ca(Y 0915-xGd x Al 0.025Eu 0.06)BO 4 phosphors was ~36 nm. The Gd additive significantly enhanced both the charge transfer (CT) transition of O 2--Eu 3+ and the absorption of the host materials, thereby resulting in an increase in emission intensity. The Ca(Y 0.715Gd 0.2Al 0.025Eu 0.06)BO 4 phosphor showed the highest emission intensity at 593 nm, which was over five times as strong as that of a Gd-free Ca(Y 0.915Al 0.025Eu 0.06)BO 4 phosphor. The addition of Gd was desirable for improving the photoluminescent properties of red-emitting Ca(Y 0.915 Al 0.025Eu 0.06)BO 4 phosphors.

Original languageEnglish
Pages (from-to)5503-5505
Number of pages3
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number10
DOIs
Publication statusPublished - 2008 Oct

Keywords

  • CaYBO
  • Emission
  • Excitation
  • Phosphor
  • Ultrasonic spray pyrolysis

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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