Differentiation between C and Si related damage centres in 4H and 6H SiC by the use of 90-300 kV electron irradiation followed by low temperature photoluminescence microscopy

J. W. Steeds, F. Carosella, G. A. Evans, M. M. Ismail, L. R. Danks, W. Voegeli

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

In this work we have been able to distinguish between silicon and carbon displacements by carrying out near-threshold electron irradiation experiments using a transmission electron microscope. The displacement energies for carbon and silicon are found, respectively, to be about 100 keV and 250 keV. After irradiation the samples have been studied by low-temperature photoluminescence spectroscopy. By carrying out the electron bombardment along (0001) and (0001̄) directions significant anisotropy of behaviour is found near the carbon displacement threshold. While the products of silicon displacement are found to be restricted to a region of irradiation those of carbon displacements are found to extend outside this region. Spectral features of higher photon energy than the laser used are explained by a two-photon absorption process.

Original languageEnglish
Pages (from-to)381-384
Number of pages4
JournalMaterials Science Forum
Volume353-356
Publication statusPublished - 2001

Fingerprint

Electron irradiation
electron irradiation
Photoluminescence
Microscopic examination
Silicon
Carbon
damage
microscopy
photoluminescence
carbon
Photons
Irradiation
silicon
Temperature
Photoluminescence spectroscopy
irradiation
thresholds
electron bombardment
photons
Anisotropy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Differentiation between C and Si related damage centres in 4H and 6H SiC by the use of 90-300 kV electron irradiation followed by low temperature photoluminescence microscopy. / Steeds, J. W.; Carosella, F.; Evans, G. A.; Ismail, M. M.; Danks, L. R.; Voegeli, W.

In: Materials Science Forum, Vol. 353-356, 2001, p. 381-384.

Research output: Contribution to journalArticle

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