DC Performance analysis of AlGaN/GaN HEMT for future High power applications

In this work, we analyzed the DC performance of asymmetric AlGaN/GaN High Electron Mobility Transistors (HEMTs) on SiC substarte using SilvacoTCAD software. The highlights of the proposed HEMT are intrinsic GaN channel, AlN nucleation layer, AlGaN barrier layer and asymmetric gate technology and GaN cap layer. The L_g = 50 nm proposed HEMT on SiC substrate exhibits a g_{m_max} of 170 mS/mm and I_{DS_max} of 800 mA/mm and breakdown voltage of 550 V. The proposed HEMT on SiC substrate exhibits a threshold voltage of -5 V which indicates its D-Mode operation of the device. This excellent DC and breakdown characteristics of the proposed HEMT makes them an excellent candidate for future high power and high frequency applications.