Energy transfer mechanisms in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ phosphors

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

Research output: Contribution to journalArticle

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Abstract

CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 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 CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ and are dependent on the Eu x 2+ acceptor concentration. As the Eu x 2+ acceptor concentration increased, the lifetime of the Ce 3+ donor decreased, while that of the donor related to the diffusion increased. The dominant energy transfer at low concentrations of the Eu x 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ was attributed to the electric dipole-dipole interaction between the Ce 3+ donors and the Eu 2+ acceptors, resulting from the diffusion limited energy migration. While a similar energy transfer mechanism at the high concentrations of the Eu 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ 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

Fingerprint

Phosphors
Energy transfer
phosphors
energy transfer
Cathodoluminescence
cathodoluminescence
electric dipoles
low concentrations
Optical properties
dipoles
optical properties
life (durability)
decay
interactions
energy

All Science Journal Classification (ASJC) codes

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

Cite this

Jeon, H. S. ; Kim, S. K. ; Kim, T. W. ; Chang, Soo Kyung ; Jeong, KwangHo ; Choi, J. C. ; Park, H. L. / Energy transfer mechanisms in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ phosphors In: Materials Research Bulletin. 2000 ; Vol. 35, No. 9. pp. 1447-1452.
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Energy transfer mechanisms in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ phosphors . / Jeon, H. S.; Kim, S. K.; Kim, T. W.; Chang, Soo Kyung; Jeong, KwangHo; Choi, J. C.; Park, H. L.

In: Materials Research Bulletin, Vol. 35, No. 9, 01.07.2000, p. 1447-1452.

Research output: Contribution to journalArticle

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AU - Jeon, H. S.

AU - Kim, S. K.

AU - Kim, T. W.

AU - Chang, Soo Kyung

AU - Jeong, KwangHo

AU - Choi, J. C.

AU - Park, H. L.

PY - 2000/7/1

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N2 - CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 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 CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ and are dependent on the Eu x 2+ acceptor concentration. As the Eu x 2+ acceptor concentration increased, the lifetime of the Ce 3+ donor decreased, while that of the donor related to the diffusion increased. The dominant energy transfer at low concentrations of the Eu x 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ was attributed to the electric dipole-dipole interaction between the Ce 3+ donors and the Eu 2+ acceptors, resulting from the diffusion limited energy migration. While a similar energy transfer mechanism at the high concentrations of the Eu 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ dominated in the transient state part, a different energy transfer mechanism appeared in the steady state part of the decay process.

AB - CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 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 CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ and are dependent on the Eu x 2+ acceptor concentration. As the Eu x 2+ acceptor concentration increased, the lifetime of the Ce 3+ donor decreased, while that of the donor related to the diffusion increased. The dominant energy transfer at low concentrations of the Eu x 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ was attributed to the electric dipole-dipole interaction between the Ce 3+ donors and the Eu 2+ acceptors, resulting from the diffusion limited energy migration. While a similar energy transfer mechanism at the high concentrations of the Eu 2+ acceptor in CaAl 12 O 19 :Ce 0.06 3+ ,Eu x 2+ dominated in the transient state part, a different energy transfer mechanism appeared in the steady state part of the decay process.

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