Auto-doping of Carbon to AlAs Grown by Metalorganic Chemical Vapor Deposition using Trimethylaluminum and Tertiarybutylarsine

Abstract
Carbon (C) heavily doped AlAs has been grown by metalorganic chemical vapor deposition (MOCVD) using trimethylaluminum (TMAl) and tertiarybutylarsine (TBA) without any additional dopant sources. The hole concentration was controlled by changing only the V/III ratio. The highest hole concentration was 2.5×1019 cm-3. The decrease in the lattice constant of C-doped AlAs shows that the acceptor activation ratio is close to unity.
Keywords