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Temperature dependence and decay times of zinc and oxygen vacancy related photoluminescence bands in zinc oxide
Department of Physics, Göteborg University, SE-412 96 Göteborg, Sweden.
Physics Department/Centre of Material Science and Nanotechnology, University of Oslo, P. O. Box 1126 Blindern, 0318 Oslo, Norway.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Physics Department/Centre of Material Science and Nanotechnology, University of Oslo, P. O. Box 1126 Blindern, 0318 Oslo, Norway.
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2008 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 145, no 5-6, 321-326 p.Article in journal (Refereed) Published
Abstract [en]

A photoluminescence study was performed at different temperatures on bulk ZnO samples annealed in zinc- and oxygen-rich atmospheres. The different annealing conditions create oxygen and zinc vacancies in a controlled way in the ZnO samples. These defects are both involved in the deep band emission (DBE) that is often observed in ZnO but exhibit different optical characteristics promoting defect identification. In particular, when decreasing the PL measurement temperature the energy peak position of the -related band decreases while that of  increases. Secondly, phonon replicas are clearly observed in the DBE spectra in the sample containing . Finally, the characteristics of the DBE decay time for - and -enriched samples are also different. Specifically, for the -enriched sample the decay curves show strong wavelength dependence and generally slower decay components as compared to the sample enriched with .

Place, publisher, year, edition, pages
Oxford, United Kingdom: Pergamon Press, 2008. Vol. 145, no 5-6, 321-326 p.
Keyword [en]
A. Semiconductors; C. Point defects; E. Luminescence
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-91395DOI: 10.1016/j.ssc.2007.10.036ISI: 000253172600022OAI: oai:DiVA.org:liu-91395DiVA: diva2:617597
Available from: 2013-04-23 Created: 2013-04-23 Last updated: 2017-12-06Bibliographically approved

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Zhao, Qing XBergman, PederWillander, Magnus

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