Radiation Defects in n-Type Germanium Studied by Deep Level Transient Spectroscopy

Abstract
Defect levels produced in n-type germanium by 1.5 MeV electron irradiation and their annealing behaviour were studied by DLTS. Two electron traps located at E c-0.20 eV and E c-0.40 eV and a hole trap at E v+0.24 eV were found to be formed by the irradiation with introduction rates of 0.05/cm, 0.54/cm and 0.22/cm respectively. When the specimen was annealed at 370 K for 10 minutes, a considerable part of the E c-0.20 eV level was observed to be transformed into a new electron trap at E c-0.23 eV.