Energy transfer mechanisms in CaAl12O19:Ce0.063+,Eux2+ phosphors

H. S. Jeon, S. K. Kim, T. W. Kim, S. K. Chang, K. Jeong, J. C. Choi, H. L. Park

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12 Citations (Scopus)

Abstract

CaAl12O19:Ce0.063+,Eux2+ phosphors were synthesized through a combustion process, and their optical properties were investigated using cathodoluminescence (CL) measurements. The results for the CL spectra showed that different energy transfer mechanisms exist in CaAl12O19:Ce0.063+,Eux2+ and are dependent on the Eux2+ acceptor concentration. As the Eux2+ acceptor concentration increased, the lifetime of the Ce3+ donor decreased, while that of the donor related to the diffusion increased. The dominant energy transfer at low concentrations of the Eux2+ acceptor in CaAl12O19:Ce0.063+,Eux2+ was attributed to the electric dipole-dipole interaction between the Ce3+ donors and the Eu2+ acceptors, resulting from the diffusion limited energy migration. While a similar energy transfer mechanism at the high concentrations of the Eu2+ acceptor in CaAl12O19:Ce0.063+,Eux2+ dominated in the transient state part, a different energy transfer mechanism appeared in the steady state part of the decay process.

Original languageEnglish
Pages (from-to)1447-1452
Number of pages6
JournalMaterials Research Bulletin
Volume35
Issue number9
DOIs
Publication statusPublished - 2000 Jul 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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