Modeling, simulations, and optimizations of gallium oxide on gallium-nitride Schottky barrier diodes

With technology computer-aided design (TCAD) simulation software, we design a new structure of gallium oxide on gallium-nitride Schottky barrier diode (SBD). The parameters of gallium oxide are defined as new material parameters in the material library, and the SBD turn-on and breakdown behavior are simulated. The simulation results reveal that this new structure has a larger turn-on current than Ga₂O₃ SBD and a larger breakdown voltage than GaN SBD. Also, to solve the lattice mismatch problem in the real epitaxy, we add a ZnO layer as a transition layer. The simulations show that the device still has good properties after adding this layer.