Influence of H2 Overpressure on the Properties of GaAs Grown by Low-Pressure MOCVD

Abstract
The influence of H2 overpressure on the electrical and optical properties of GaAs epitaxial layer grown by the low-pressure MOCVD of TMG/AsH3/H2 system was studied. It was demonstrated that high H2 overpressure was not necessary in the reaction process to reduce carbon contamination for low-pressure MOCVD. The carbon incorporation process in low-pressure MOCVD was discussed briefly.