Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3233935
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An in situ surface passivation of InP (100) using H2S during metal organic vapor phase epitaxy has been characterized by x-ray photoemission spectroscopy and photoluminescence. X-ray photoelectron spectra indicate that the H2S-treated InP at 300 degrees C is free of P and In oxides even after exposure to air. The enhancement of photoluminescence intensity confirms that H2S passivation of an InP epilayer can reduce the surface defects. It is shown that H2S treatment results in In-S bonds, which dominate the sulfur-passivated InP surface, effectively suppressing interface oxidation during the subsequent ultrathin Al2O3 dielectric film growth. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3233935]
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