Change search
ReferencesLink to record
Permanent link

Direct link
Hydrogen-boron complex formation and dissociation in 4H-silicon carbide
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-8760-1137
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-0292-224X
2001 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 184, no 04-jan, 257-262 p.Article in journal (Refereed) Published
Abstract [en]

The diffusion of deuterium (H-2) in p-type 4H-silicon carbide (SiC) has been studied in detail by secondary ion mass spectrometry. An effective capture radius for the formation of H-2-B complexes at 460 degreesC is determined to R-HB = (21 +/- 4) A. This value is in good agreement with that expected for a coulomb force-assisted trapping mechanism. At higher temperatures, the H-2 diffusion follows Fick's law with a constant effective diffusivity from which the complex dissociation frequencies nu (HB) are determined. The frequencies exhibit an Arrhenius temperature dependence over the three orders of magnitude covered by the extracted nu (HB). The complex dissociation energy is determined to E-d(HB) = (2.51 +/- 0.04) eV which is 0.9 eV larger than the corresponding value for the H-2-Al complex, suggesting that the atomic configurations for the two complexes are significantly different. The extracted dissociation attempt frequency, nu (HB)(0) = (1.2 +/- 0.7) x 10(13) s(-1) is very close to the characteristic oscillation frequency of the SiC lattice, nu (SiC)(lattice) = 1.6 x 10(13) s(-1). In addition, H-2 diffusion in an epitaxial AI multilayer structure demonstrates the influence of internal electric fields on the H-2 diffusion in p-type SiC.

Place, publisher, year, edition, pages
2001. Vol. 184, no 04-jan, 257-262 p.
Keyword [en]
hydrogen, SiC, boron, passivation, dissociation, SIMS, silicon-carbide, passivation
URN: urn:nbn:se:kth:diva-21209ISI: 000173000100044OAI: diva2:339906
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Hallén, Anders.Linnarsson, Margareta K
By organisation
Microelectronics and Information Technology, IMIT
In the same journal
Applied Surface Science

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 13 hits
ReferencesLink to record
Permanent link

Direct link