The tunnel field-effect transistor (TFET) with surrounding channel nanowire (SCNW) structure promises better performance than the conventional planar TFET in terms of subthreshold swing (SS) and on-current (). In spite of the advantages of SCNW TFET, there are some technical issues in the aspects of a hump phenomenon in subthreshold region and a high ambipolar current () in off-state. In order to overcome these issues, a novel dual-gate SCNW TFET (DG-SCNW TFET) with differential gate work functions (WFs) and a gate-drain underlap is proposed and studied by using technology computer-aided design (TCAD) simulation. In addition, a hetero-junction with SiGe source is applied to improve the device performance. Finally, it is confirmed that the optimized DG-SCNW TFET shows the remarkable performance comparing with the control device.
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| http://dx.doi.org/10.1166/jnn.2020.17793 | DOI Listing |
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