Paper Title:
Optical and Structural Properties of In-Grown Stacking Faults in 4H-SiC Epilayers
  Abstract

Two different and novel in-grown triangular stacking faults have been observed and characterized in 4H-SiC epitaxial layers grown on 4o off-cut substrates. The faults were formed at the beginning of the growth and extended continuously in size during the growth. Their structural and optical properties were however different as seen from both synchrotron white beam topography and low temperature photoluminescence. The luminescence spectra were similar but appeared in different energy regions 2.85 – 2.95 eV and 2.48 – 2.64 eV, respectively. BPDs present in the epilayer are found to be transformed into SFs under laser excitation during high resolution optically detected lifetime mapping. The faults are found to expand from the epilayer surface towards the epi-substrate interface. The optical spectrum from this fault is identical to the emission from the single layered Shockley stacking faults with excitonic bandgap of 3.034 eV previously only observed and formed in the bipolar diodes during forward voltage operation.

  Info
Periodical
Materials Science Forum (Volumes 645-648)
Edited by
Anton J. Bauer, Peter Friedrichs, Michael Krieger, Gerhard Pensl, Roland Rupp and Thomas Seyller
Pages
307-310
DOI
10.4028/www.scientific.net/MSF.645-648.307
Citation
J. ul Hassan, A. Henry, P. Bergman, "Optical and Structural Properties of In-Grown Stacking Faults in 4H-SiC Epilayers", Materials Science Forum, Vols. 645-648, pp. 307-310, 2010
Online since
April 2010
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$32.00
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