Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
The GaN films grown on buffer layers containing quantum dots by molecular beam epitaxy on sapphire substrates were investigated. The density of the dislocations in the films was determined by wet chemical etching and atomic force microscopy. It was found that the insertion of a set of multiple GaN quantum-dot layers in the buffer layer effectively reduces the density of the dislocations in the epitaxial layers. As compared to the dislocation density of ∼1010 cm−2in the typical GaN films grown on AlNbuffer layer, a density of ∼3×107 cm−2 was demonstrated in the GaN films grown with quantum dot layers.
Huang, D., Reshchikov, M.A., Yun, F., et al. Defect reduction with quantum dots in GaN grown on sapphire substrates by molecular beam epitaxy. Applied Physics Letters, 80, 216 (2002). Copyright © 2002 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications