Multi-Level Trap Assisted Tunneling Model for the Field and Temperature Dependence of SiC-JBS Reverse Leakage Current
The reverse-bias current-voltage characteristics of commercial 1200 V 4H-silicon-carbide junction barrier Schottky (SiC-JBS) rectifiers are studied both experimentally and through numerical simulation. The reverse leakage current measured from physical devices is observed to display both a strong temperature and field dependence. A model is presented to explain the observed behavior based on a combination of trap-assisted tunneling and a thermionic-emission mechanism through a potential barrier located at the metal-SiC interface. The study shows that a two-level trapping model can be necessary to properly explain the measured data. Excellent agreement between the models and the measurements is obtained over a wide range of bias and temperature.
Robert Stahlbush, Philip Neudeck, Anup Bhalla, Robert P. Devaty, Michael Dudley and Aivars Lelis
G. Dolny et al., "Multi-Level Trap Assisted Tunneling Model for the Field and Temperature Dependence of SiC-JBS Reverse Leakage Current", Materials Science Forum, Vol. 924, pp. 601-604, 2018