Reduced Carbon Contamination in OMVPE Grown GaAs and AlGaAs

Trimethyl and triethyl organometallic source materials were compared through the investigation on the optical and electrical properties of undoped GaAs and AlGaAs layers grown from these materials. Our experimental results indicate that the carbon contamination in the grown GaAs and AlGaAs is greatly reduced when triethyl organometallic compounds are used insteads of trimethyl organometallic compounds.