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Morphology-dependent upconversion luminescence of ZnO:Er3+nanocrystals

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Volume
128
Issue
1
Identifiers
DOI: 10.1016/j.jlumin.2007.04.011
Keywords
  • Zno:Er3+
  • Rare-Earth Ions
  • Upconversion
  • Luminescence
  • Morphology
Disciplines
  • Earth Science
  • Geography
  • Physics

Abstract

Abstract Morphology impact on the upconverted luminescence of ZnO:Er 3+ nanocrystals was studied with controllable morphology of nanorod, prickly sphere-like, column-like, branch rod, prism-like, and grain-like, prepared via the cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal process. The upconversion emission of Er 3+ with 980 nm excitation demonstrated morphology sensitivity which was related with the local environments of Er 3+ ions in ZnO and doping efficiency. Under ultraviolet (UV) direct excitation, where exciton and defect emissions of ZnO appeared, morphology sensitivity was discussed in terms of surface-to-volume ratios.

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