Photoluminescence study of the driving force for stacking fault expansion in 4H-SiC

Rii Hirano, Yuki Sato, Michio Tajima, Kohei M. Itoh, Koji Maeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

We investigated expansion velocities of Shockley stacking faults (SSFs) in 4H-silicon carbide under laser illumination using photoluminescence methods. The experiments showed that the velocity of SSF expansion or the glide velocity of SSF-bounding 30°-Si(g) partial dislocations (PD) is superlinearly dependent on the excitation intensity. We estimated the sample temperature by analyzing the broadening of band-edge emission and concluded that the lattice heating by laser illumination is not the cause of the enhanced dislocation glide. The superlinear dependence can be accounted for by a photo-induced sign reversal of the effective formation energy of the SSF acting as the driving force of SSF expansion under the illumination.

Original languageEnglish
Title of host publicationSilicon Carbide and Related Materials 2011, ICSCRM 2011
Pages395-398
Number of pages4
DOIs
Publication statusPublished - 2012 May 29
Event14th International Conference on Silicon Carbide and Related Materials 2011, ICSCRM 2011 - Cleveland, OH, United States
Duration: 2011 Sep 112011 Sep 16

Publication series

NameMaterials Science Forum
Volume717-720
ISSN (Print)0255-5476

Other

Other14th International Conference on Silicon Carbide and Related Materials 2011, ICSCRM 2011
CountryUnited States
CityCleveland, OH
Period11/9/1111/9/16

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Keywords

  • 4H-SiC
  • Photoluminescence
  • Radiation-enhanced dislocation glide
  • Stacking faults

ASJC Scopus subject areas

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

Cite this

Hirano, R., Sato, Y., Tajima, M., Itoh, K. M., & Maeda, K. (2012). Photoluminescence study of the driving force for stacking fault expansion in 4H-SiC. In Silicon Carbide and Related Materials 2011, ICSCRM 2011 (pp. 395-398). (Materials Science Forum; Vol. 717-720). https://doi.org/10.4028/www.scientific.net/MSF.717-720.395