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Nanointegration of ZnO with Si and SiC
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Aristotle University Thessaloniki, GR-54006 Thessaloniki, Greece .
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
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2009 (English)In: PHYSICA B-CONDENSED MATTER, ISSN 0921-4526, Vol. 404, no 22, 4359-4363 p.Article in journal (Refereed) Published
Abstract [en]

The study is dedicated to some aspects of the controlled heteroepitaxial growth of nanoscaled ZnO structures and an investigation of their general and dimension mediated properties. ZnO nanostructures were synthesized by optimized MOCVD process via two growth approaches: (i) catalyst free self-organized growth of ZnO on Si substrates and (ii) ZnO heteroepitaxy on p-type hexagonal 4H-SiC substrates. The SiC substrate was prepared by sublimation epitaxy and served as a template for the ZnO epitaxial growth. The epitaxial growth of n-ZnO on p-SiC resulted in a regular matrix of well-faceted hexagonally shaped ZnO single crystals. The achievement of ZnO integration with Si encompasses controlled growth of vertically oriented nanosized ZnO pillars. The grown structures were characterized by transmission electron microscopy and microphotoluminescence. Low concentration of native defects due to a stoichiometry balance, advanced optical emission, (excitonic type near-band-edge emission and negligible defect related luminescence) and continuous interfaces (epitaxial relationship ZnO[0 0 0 1]/ SiC[0 0 0 1]) are evidenced. The ZnO nanopillars were further probed as field emitters: the grown structures exhibits advanced field emission properties, which are explained in term of dimensionality and spatial uniformity of the nanopillars. The present results contribute to understanding and resolving growth and device related issues of ZnO as a functional nanostructured material.

Place, publisher, year, edition, pages
2009. Vol. 404, no 22, 4359-4363 p.
Keyword [en]
Crystal growth, Heteroepitaxy, ZnO, Nanopillars, p-n junction
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-52771DOI: 10.1016/j.physb.2009.09.032OAI: oai:DiVA.org:liu-52771DiVA: diva2:285503
Available from: 2010-01-12 Created: 2010-01-12 Last updated: 2011-01-27

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Khranovskyy, VolodymyrLarsson, ArvidHoltz, Per-OlofYakimova, Rositsa

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