Consistent Modelling of I-V and C-V Behaviour of GaN HEMTs in Presence of Trapping

Charge trapping in Gallium Nitride (GaN) based high electron mobility transistors (HEMTs) is known to change the I-V behaviour of these devices. Trapping also changes the C-V behaviour of the device. In this paper, for the first time, we present a physics-based compact model which captures the I-V and the C-V characteristics of the device in presence of trapping effects consistently with I-V and C-V modelled using the same set of model formulations and physical model parameters. The developed model shows excellent agreement to the measured data. The importance of a consistent I-V and C-V model is also shown.