Electrical properties of extended defects in 4H-SiC investigated by photoinduced current measurements

We study the correlation between crystal quality and electrical transport in 4H-SiC by micro-photoluminescence and laser-beam-induced photocurrent measurements. A focused HeCd laser at 325 nm has been employed to simultaneously measure, with a spatial resolution of a few microns, both the photolumin...

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Bibliographic Details
Published in:Applied physics express 2017-03, Vol.10 (3), p.36601
Main Authors: Privitera, Stefania M. S., Litrico, Grazia, Camarda, Massimo, Piluso, Nicolò, La Via, Francesco
Format: Article
Language:English
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Summary:We study the correlation between crystal quality and electrical transport in 4H-SiC by micro-photoluminescence and laser-beam-induced photocurrent measurements. A focused HeCd laser at 325 nm has been employed to simultaneously measure, with a spatial resolution of a few microns, both the photoluminescence and current-voltage characteristics of 4H-SiC Schottky diodes. We found that the laser-induced photocurrent acquired along a defect can give information on its spatial distribution in depth and that the local minority carrier lifetime and generation depend on the type of stacking fault, both decreasing for defects with deeper intragap levels.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.10.036601