Minority-Carrier Lifetime in Heavily Doped GaAs:C

Abstract
Electron lifetimes at 295 K and 5 K are measured by time-resolved photoluminescence in the picosecond and subpicosecond regime in GaAs:C epitaxial layers with hole concentrations from p 0=5×1017 to 4×1020 cm-3. The recombination is more efficient than the calculated one using the recombination coefficients of intrinsic GaAs. An enhanced, temperature independent Auger coefficient of (2±1)×10-29 cm6 s-1 is fitted to the measured lifetimes.