Effect of crystallographic dislocations on the reverse performance of 4H-SiC p-n diodes

Details Effect of crystallographic dislocations on the reverse performance of 4H-SiC p-n diodes Effect of crystallographic dislocations on the reverse performance of 4H-SiC p-n diodes

2010-10-04

arxiv.org/abs/1010.0474v1

Published as a journal of material letters in 2009

Physics

Condensed Matter

Materials Science

3 pages, 3 figures, published as a journal in material letters

Scientific paper

A quantitative study was performed to investigate the impact of crystallographic dislocation defects, 21 including screw dislocation, basal plane dislocation, and threading edge dislocation, and their locations in 22 active and JTE region, on the reverse performance of 4H-SiC p-n diodes. It was found that higher leakage 23 current in diodes is associated with basal plane dislocations, while lower breakdown voltage is attributed to 24 screw dislocations. The above influence increases in severity when the dislocation is in the active region than 25 in the JTE region. Furthermore, due to the closed-core nature, the impact of threading edge dislocation on the 26 reverse performance of the p-n diodes is less severe than that of other dislocations although its density is 27 much higher.

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