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Negative effect of arsenic on indium composition of InGaN grown by metalorganic chemical vapor deposition
Author(s) -
Na Hyunseok
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200825008
Subject(s) - arsenic , indium , chemical vapor deposition , materials science , metalorganic vapour phase epitaxy , deposition (geology) , environmental chemistry , optoelectronics , chemistry , nanotechnology , metallurgy , epitaxy , biology , layer (electronics) , paleontology , sediment
Abstract InGaN/GaN multiple quantum‐well structures and In–GaN/ GaN multilayers were grown on GaN/sapphire substrates by low‐pressure metalorganic chemical vapor deposition. As the tertiarybutylarsine flow rate increased, we observed various unexpected structural and optical results. These results were attributed to the reduction of In composition in InGaN from 10% to 3.7% with an increase of the TBA flow rate up to 1 μmol/min, as characterized by secondary ion mass spectrometry. Interestingly, the As concentration was also reduced slightly, accompanying the decrease in In composition. This unexpected result came from changed surface kinetics not from a gas‐phase reaction. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)