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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
김성구scopusscopus
Issue Date
2000
Journal Title
Materials Research Bulletin
ISSN
0025-5408JCR Link
Citation
vol. 35, no. 9, pp. 1447 - 1452
Publisher
Elsevier Science Ltd, Exeter, United Kingdom
Indexed
SCI; SCIE; SCOPUS WOS scopus
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
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자연과학대학 > 물리학전공 > Journal papers
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