Figure of merit for and identification of sub-60 mV/decade devices

William G. Vandenberghe, Anne S. Verhulst, Bart Sorée, Wim Magnus, G. Groeseneken, Quentin Smets, Marc Heyns, Massimo V. Fischetti

Applied Physics Letters · 2013 · 110 citations · 15 references

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Abstract

A figure of merit I60 is proposed for sub-60 mV/decade devices as the highest current where the input characteristics exhibit a transition from sub- to super-60 mV/decade behavior. For sub-60 mV/decade devices to be competitive with metal-oxide-semiconductor field-effect devices, I60 has to be in the 1-10 μA/μm range. The best experimental tunnel field-effect transistors (TFETs) in the literature only have an I60 of 6×10−3 μA/μm but using theoretical simulations, we show that an I60 of up to 10 μA/μm should be attainable. It is proven that the Schottky barrier FET (SBFET) has a 60 mV/decade subthreshold swing limit while combining a SBFET and a TFET does improve performance.

References

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