Luminescent properties and reduced dimensional behavior of hydrothermally prepared Y2SiO5:Ce nanophosphors
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- D. W. Cooke
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- J.-K. Lee
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- B. L. Bennett
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- J. R. Groves
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- L. G. Jacobsohn
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- E. A. McKigney
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- R. E. Muenchausen
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- M. Nastasi
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- K. E. Sickafus
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- M. Tang
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- J. A. Valdez
- Los Alamos National Laboratory Materials Science and Technology Division, , Los Alamos, New Mexico 87545
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- J.-Y. Kim
- Seoul National University School of Materials Science and Engineering, , Shillim-dong, Seoul 151-744, South Korea
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- K. S. Hong
- Seoul National University School of Materials Science and Engineering, , Shillim-dong, Seoul 151-744, South Korea
説明
<jats:p>Hydrothermally prepared nanophosphor Y2SiO5:Ce crystallizes in the P21∕c structure, rather than the B2∕b structure observed in bulk material. Relative to bulk powder, nanophosphors of particle size ∼25–100nm diameter exhibit redshifts of the photoluminescence excitation and emission spectra, reduced self absorption, enhanced light output, and medium-dependent radiative lifetime. Photoluminescence data are consistent with reduced symmetry of the P21∕c structure and are not necessarily related to reduced dimensionality of the nanophosphor. In contrast, medium-dependent lifetime and enhanced light output are attributed to nanoscale behavior. Perturbation of the Ce ion electric field is responsible for the variable lifetime.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 88 (10), 2006-03-06
AIP Publishing