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Title: Enhanced luminescence in Eu-doped ZnO nanocrystalline films

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.

Authors:
; ;  [1]
  1. Murata Manufacturing Co., Ltd., 10-1, Higashikotari 1-chome, Nagaokakyo, Kyoto 617-8555 (Japan)
Publication Date:
OSTI Identifier:
22486332
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 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

Citation Formats

Suzuki, Keigo, E-mail: ksuzuki@murata.com, Murayama, Koji, and Tanaka, Nobuhiko. Enhanced luminescence in Eu-doped ZnO nanocrystalline films. United States: N. p., 2015. Web. doi:10.1063/1.4926986.
Suzuki, Keigo, E-mail: ksuzuki@murata.com, Murayama, Koji, & Tanaka, Nobuhiko. Enhanced luminescence in Eu-doped ZnO nanocrystalline films. United States. doi:10.1063/1.4926986.
Suzuki, Keigo, E-mail: ksuzuki@murata.com, Murayama, Koji, and Tanaka, Nobuhiko. Mon . "Enhanced luminescence in Eu-doped ZnO nanocrystalline films". United States. doi:10.1063/1.4926986.
@article{osti_22486332,
title = {Enhanced luminescence in Eu-doped ZnO nanocrystalline films},
author = {Suzuki, Keigo, E-mail: ksuzuki@murata.com and Murayama, Koji and Tanaka, Nobuhiko},
abstractNote = {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.},
doi = {10.1063/1.4926986},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 3,
volume = 107,
place = {United States},
year = {2015},
month = {7}
}