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Selective etching of dislocations in GaN grown by low-pressure solution growth

 
: Knoke, I.Y.; Berwian, P.; Meissner, E.; Friedrich, J.; Strunk, H.P.; Müller, G.

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Journal of Crystal Growth 312 (2010), Nr.20, S.3040-3045
ISSN: 0022-0248
Englisch
Zeitschriftenaufsatz
Fraunhofer IISB ()

Abstract
This work presents an experimental study on the identification and quantification of different types of dislocations in GaN grown by low-pressure solution growth. A reliable defect selective etching procedure in a NaOH-KOH melt is developed and validated using transmission electron microscopy that permits to define groups of etch pits that belong each to dislocations with a specific Burgers vector. This way a comparably fast method is provided for determining the total, the specific dislocation densities and the type of dislocation in a statistically representative way. The results for the solution grown samples are compared to those obtained for MOCVD GaN.

: http://publica.fraunhofer.de/dokumente/N-146485.html