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Early stages of growth and crystal structure evolution of boron nitride thin films
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-5768-0244
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering. Grenoble INP, France.
Hungarian Academic Science, Hungary.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
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2016 (English)In: Japanese Journal of Applied Physics, ISSN 0021-4922, E-ISSN 1347-4065, Vol. 55, no 5, 05FD06- p.Article in journal (Refereed) Published
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Abstract [en]

A study of the nucleation and crystal structure evolution at the early stages of the growth of sp(2)-BN thin films on 6H-SiC and alpha-Al2O3 substrates is presented. The growth is performed at low pressure and high temperature in a hot wall CVD reactor, using ammonia and triethylboron as precursors, and H-2 as carrier gas. From high-resolution transmission electron microscopy and X-ray thin film diffraction measurements we observe that polytype pure rhombohedral BN (r-BN) is obtained on 6H-SiC substrates. On alpha-Al2O3 an AlN buffer obtained by nitridation is needed to promote the growth of hexagonal BN (h-BN) to a thickness of around 4 nm followed by a transition to r-BN growth. In addition, when r-BN is obtained, triangular features show up in plan-view scanning electron microscopy which are not seen on thin h-BN layers. The formation of BN after already one minute of growth is confirmed by X-ray photoelectron spectroscopy. (C) 2016 The Japan Society of Applied Physics

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2016. Vol. 55, no 5, 05FD06- p.
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Physical Sciences
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URN: urn:nbn:se:liu:diva-128949DOI: 10.7567/JJAP.55.05FD06ISI: 000374697600030OAI: oai:DiVA.org:liu-128949DiVA: diva2:934909
Conference
6th International Symposium on Growth of III-Nitrides (ISGN)
Available from: 2016-06-09 Created: 2016-06-07 Last updated: 2016-06-09

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Henry, AnneChubarov, MikhailGarbrecht, MagnusHögberg, Hans
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