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Author Suzuki, Keigo ♦ Murayama, Koji ♦ Tanaka, Nobuhiko
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION ♦ ANNEALING ♦ ATOMS ♦ CRYSTALS ♦ DESIGN ♦ DOPED MATERIALS ♦ ENERGY TRANSFER ♦ EUROPIUM IONS ♦ LUMINESCENCE ♦ MICROEMULSIONS ♦ NANOPARTICLES ♦ NANOSTRUCTURES ♦ PHOSPHORS ♦ THIN FILMS ♦ ZINC OXIDES
Abstract We found an enhancement of Eu{sup 3+} emissions in Eu-doped ZnO nanocrystalline films fabricated by microemulsion method. The Eu{sup 3+} emission intensities were increased by reducing annealing temperatures from 633 K to 533 K. One possible explanation for this phenomenon is that the size reduction enhances the energy transfer from ZnO nanoparticles to Eu{sup 3+} ions. Also, the shift of the charge-transfer band into the low-energy side of the absorption edge is found to be crucial, which seems to expedite the energy transfer from O atoms to Eu{sup 3+} ions. These findings will be useful for the material design of Eu-doped ZnO phosphors.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-07-20
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 3


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