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This paper investigates the impact of different interface trap charges (ITCs) on dual-material gate-oxide-stack double-gate TFET (DMGOSDG-TFET) by introducing localized charges (donor/acceptor) at the interface of semiconductor/insulator. For this, we have observed the effects of different ITCs on both conventional dual material control gate tunnel field effect transistor (DMCG-TFET) and dual-material gate-oxidestack double-gate TFET with identical dimensions in terms of DC, analog/RF and linearity performance parameters. Both the devices with positive (donor) and negative (acceptor) ITCs, have been simulated using technology computer-aided design (TCAD) tool. To understand the impact of different ITCs on the DC and analog/RF performances, the parameters such as electric field, transfer characteristics, transconductance, parasitic capacitance, fT, GBP and TFP for DMGOSDG-TFET have been analyzed and compared with that of DMCG-TFET. Further, to analyze the effect of different ITCs on the linearity performances, the parameters VIP2, VIP3, IIP3 and IMD3 have been investigated and compared with that of the conventional DMCG-TFET. Simulation results demonstrate that DMGOSDG-TFET is more immune towards different types of ITCs as compared to the conventional DMCG-TFET. Hence, DMGOSDG-TFET is more reliable over the conventional device for ultra low power applications.
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Singh et al. (2020) studied this question.
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