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Efficient nitrogen incorporation in ZnO nanowires
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-6405-9509
Humboldt University, Institute of Chemistry, Berlin, Germany.
University of California, Department of Electrical and Computer Engineering, La Jolla, CA, USA.
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2015 (English)In: Scientific Reports, ISSN 2045-2322, Vol. 5, 13406Article in journal (Refereed) Published
Abstract [en]

One-dimensional ZnO nanowires (NWs) are a promising materials system for a variety of applications. Utilization of ZnO, however, requires a good understanding and control of material properties that are largely affected by intrinsic defects and contaminants. In this work we provide experimental evidence for unintentional incorporation of nitrogen in ZnO NWs grown by rapid thermal chemical vapor deposition, from electron paramagnetic resonance spectroscopy. The incorporated nitrogen atoms are concluded to mainly reside at oxygen sites (NO). The NO centers are suggested to be located in proximity to the NW surface, based on their reduced optical ionization energy as compared with that in bulk. This implies a lower defect formation energy at the NW surface as compared with its bulk value, consistent with theoretical predictions. The revealed facilitated incorporation of nitrogen in ZnO nanostructures may be advantageous for realizing p-type conducting ZnO via N doping. The awareness of this process can also help to prevent such unintentional doping in structures with desired n-type conductivity.

Place, publisher, year, edition, pages
Nature Publishing Group, 2015. Vol. 5, 13406
Keyword [en]
ZnO, nitrogen, doping
National Category
Condensed Matter Physics
URN: urn:nbn:se:liu:diva-121081DOI: 10.1038/srep13406ISI: 000359931900001PubMedID: 26299157OAI: diva2:851533
Available from: 2015-09-06 Created: 2015-09-06 Last updated: 2015-09-16Bibliographically approved

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