Abstract

This paper reports a method to suppress the ambipolar effect and enhance the on-state current in Tunnel Field Effect Transistor by exploiting the advantages of Silicon-Germanium (SiGe). The optimum hetero-dielectric device architecture is proposed with highly doped SiGe pocket at source-channel junction. Further, a detailed investigation in both static as well as RF performance is carried out for the proposed device in comparison with the conventional one. Wide range of performance metrics such as ambipolar current (IAMB), on-off ratio (ION/IOFF), effect of quantum correction model, gate-to-drain capacitance (Cgd), gate-to-source capacitance (Cgs), transconductance (gm), Gain band-width (GBW) product, Cut-off frequency (fT) are evaluated and compared among various device architectures.

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