LPE-GaAs grown in carbon, boron nitride and alumina crucibles has been
examined using standard characterisation techniques including capacit
ance-voltage (C-V) measurements and deep level transient spectroscopy
(DLTS). The epitaxial layers have net carrier concentration ranging fr
om 5 x 10(14) to 8 x 10(15) carriers per cm(3). DLTS data has shown th
at all epitaxial layers have deep level traps.