Energy transfer between Ce3+ and Eu2+ in SrAl12O19:Cex3+, Eu0.012+ (x = 0.01-0.09)

J. S. Choi, S. H. Baek, S. G. Kim, S. H. Lee, H. L. Park, S. I. Mho, T. W. Kim, Y. H. Hwang

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Abstract

The influence of the Ce3+ concentration on the cathodoluminescence (CL) characteristics of SrAl12O19:Cex3+, Eu0.012+ (x = 0.01-0.09) was studied. At 1 mol% cerium in SrAl12O19:Cex3+, Eu0.012+ (x = 0.01), two broad emission bands centered at 320 nm and at about 400 nm were observed. The intensity of Ce3+ emission at 320 nm decreased as the Ce3+ concentration increased, whereas the intensity of the emission band at 400 nm increased with increasing Ce3+ concentration at fixed Eu2+ concentration. At low concentration of Ce3+ (x = 0.1-0.5), the Ce3+ emission intensity decreased with the Eu2+ emission intensity being enhanced due to the energy transfer from Ce3+ to Eu2+. In high concentrations of Ce3+ (x = 0.07, 0.09), the cross-relaxation processes between nearest Ce3+ ions led to the diminishing intensity of Ce3+ emission, because of the limited energy acceptors, i.e., Eu2+ ions, which resulted in a single emission band at about 400 nm.

Original languageEnglish
Pages (from-to)551-556
Number of pages6
JournalMaterials Research Bulletin
Volume34
Issue number4
DOIs
Publication statusPublished - 1999 Mar 1

Bibliographical note

Funding Information:
This study has been supported by Korea Research Foundation in 1997.

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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