Effect of post-growth annealing treatment on interfacial misfit GaSb/GaAs heterostructures

• We studied diodes based on GaSb/GaAs samples grown by Interfacial Misfit Technique.
• We show that possible defect compensation is observed with the annealing treatments.
• The turn on voltage of devices decreases as the annealing temperature increases.
• The results showed that the annealing improves the electrical properties of devices.

Post-growth annealing treatments in the range 400–600 °C are performed on GaSb/GaAs Interfacial Misfit grown samples. Current density–voltage (J–V), Capacitance–voltage (C–V), capacitance–frequency (C–F) and Deep Level Transient Spectroscopy (DLTS) measurements are performed on as-grown and annealed samples. Our studies show that possible defect compensation is observed with the annealing treatments, resulting in a significant improvement in the performances of the devices.