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Boron diffusion in nanocrystalline 3C-SiC (Articolo in rivista)
- Type
- Label
- Boron diffusion in nanocrystalline 3C-SiC (Articolo in rivista) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1063/1.4880722 (literal)
- Alternative label
M. Schnabel, C. Weiss, M. Canino, T. Rachow, P. Löper, C. Summonte, S. Mirabella, S. Janz, and P.R. Wilshaw (2014)
Boron diffusion in nanocrystalline 3C-SiC
in Applied physics letters; AIP Publishing LLC, Melville, NY 11747 (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- M. Schnabel, C. Weiss, M. Canino, T. Rachow, P. Löper, C. Summonte, S. Mirabella, S. Janz, and P.R. Wilshaw (literal)
- Pagina inizio
- Pagina fine
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- http://dx.doi.org/10.1063/1.4880722 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- 1Fraunhofer ISE, Heidenhofstr. 2, 79110 Freiburg, Germany
2Department of Materials, University of Oxford, Parks Rd, Oxford OX1 3PH, United Kingdom
3CNR-IMM, Via Piero Gobetti 101, 40129 Bologna, Italy
4CNR-IMM MATIS, Via S. Sofia 64, 95123 Catania, Italy (literal)
- Titolo
- Boron diffusion in nanocrystalline 3C-SiC (literal)
- Abstract
- The diffusion of boron in nanocrystalline silicon carbide (nc-SiC) films with a grain size of 4-7 nm
is studied using a poly-Si boron source. Diffusion is found to be much faster than in
monocrystalline SiC as it takes place within the grain boundary (GB) network. Drive-in
temperatures of 900-1000 ?C are suitable for creating shallow boron profiles up to 100 nm deep,
while 1100 ?C is sufficient to flood the 200 nm thick films with boron. From the resulting plateau at
1100 ?C a boron segregation coefficient of 28 between nc-SiC and the Si substrate, as well as a GB
boron solubility limit of 0.2 nm?2 is determined. GB diffusion in the bulk of the films is Fickian
and thermally activated with DGBðTÞ ¼ ð3:1 ? 5:6Þ ? 107expð?5:0360:16 eV=kBTÞ cm2s?1. The
activation energy is interpreted in terms of a trapping mechanism at dangling bonds. Higher boron
concentrations are present at the nc-SiC surface and are attributed to immobilized boron. (literal)
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