Insight into the Output Characteristics of III-V Tunneling Field Effect Transistors

  • Authors:
    Bijesh Rajamohanan (Penn State), Dheeraj Mohata (Penn State), Ashkar Ali (Penn State), Suman Datta (Penn State)
    Publication ID:
    P066404
    Publication Type:
    Paper
    Received Date:
    20-Apr-2013
    Last Edit Date:
    22-Apr-2013
    Research:
    1806.005 (University of Notre Dame)

Abstract

The mechanism of the drain current saturation in the output characteristics of a III-V tunneling Field Effect Transistor (TFET) is explained in detail using numerical simulations as well as physics-based analytical models. We clearly identify impact of the source doping on delayed output saturation, and non-linear turn on behavior observed in the output characteristics of TFETs. Our model uses Wentzen-Krammel-Brillouin (WKB) approximation and considers the exponentially decaying potential profile in the channel. The choice of source doping in a III-V p-channel TFET requires tradeoff between maintaining steep switching and delayed saturation voltage which is of importance for complementary TFET logic.

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