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Energy transfer mechanisms in CaAl12O19:Ce0.06 3+,Eux 2+ phosphors
- Title
- Energy transfer mechanisms in CaAl12O19:Ce0.06 3+,Eux 2+ phosphors
- Authors
- Jeon H.S.; Kim S.K.; Kim T.W.; Chang S.K.; Jeong K.; Choi J.C.; Park H.L.
- Ewha Authors
- 김성구
- SCOPUS Author ID
- 김성구
- Issue Date
- 2000
- Journal Title
- Materials Research Bulletin
- ISSN
- 0025-5408
- Citation
- Materials Research Bulletin vol. 35, no. 9, pp. 1447 - 1452
- Publisher
- Elsevier Science Ltd, Exeter, United Kingdom
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- CaAl12O19:Ce0.06 3+,Eux 2+ 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:Ce0.06 3+,Eux 2+ and are dependent on the Eux 2+ acceptor concentration. As the Eux 2+ 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 Eux 2+ acceptor in CaAl12O19:Ce0.06 3+,Eux 2+ 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:Ce0.06 3+,Eux 2+ dominated in the transient state part, a different energy transfer mechanism appeared in the steady state part of the decay process.
- DOI
- 10.1016/S0025-5408(00)00341-X
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
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