Title

Identification of dislocations and their influence on the recombination of charge carriers in gallium nitride.

Authors

Govorkov, A.; Polyakov, A.; Yugova, T.; Smirnov, N.; Petrova, E.; Mezhennyi, M.; Markov, A.; Lee, I.; Pearton, S.

Abstract

The relation between the density of etch pits revealed in GaN by etching in a KOH/NaOH eutectic and the density of dislocations determined by transmission electron microscopy (TEM) is studied along with the relation between the density of dislocations and the density of dark spot defects observed in GaN by microcathodoluminescence (MCL) and electron-beam-induced current (EBIC). It is demonstrated that selective etching is a reliable rapid method for the determination of the type and density of dislocations in GaN in the range 106–108 cm−2, while MCL and EBIC can be used for the rapid nondestructive determination of the density of dislocations in the range 106–108 cm−2. It is also found that some deep electron and hole traps are related to dislocations.

Publication

Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques, 2007, Vol 1, Issue 4, p380

ISSN

1027-4510

Publication type

Academic Journal

DOI

10.1134/S1027451007040039