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|Title:||Nature of red luminescence in oxygen treated hydrothermally grown zinc oxide nanorods|
Siwaporn Meejoo Smith
Anthony R. Moon
Matthew R. Phillips
University of Technology Sydney
Technical University of Berlin
|Keywords:||Biochemistry, Genetics and Molecular Biology;Chemistry|
|Citation:||Journal of Luminescence. Vol.168, (2015), 20-25|
|Abstract:||© 2015 Published by Elsevier B.V. A strong broad red luminescence (RL) peak centered at 1.69 eV (FWHM=0.57 eV) at 15 K [1.78 eV (FWHM=0.69 eV) at 300 K] is formed in ZnO nanorods hydrothermally grown at low temperature following thermal annealing at 650 °C for 30 min in an O<inf>2</inf> gas environment. The optical properties of this peak were comprehensively studied using a range of characterization techniques, including photoluminescence and cathodoluminescence spectroscopy, X-ray absorption near edge spectroscopy and electron paramagnetic resonance spectroscopy. With decreasing temperature the RL peak position red shifted and its FWHM became narrower in accordance with the configuration coordinate model. Using these results, the RL has been assigned to highly lattice coupled V<inf>Zn</inf>-related acceptor-like centers. No correlation was found between the observed red luminescence and nitrogen impurities.|
|Appears in Collections:||Scopus 2011-2015|
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