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Improved performance of a junctionless tunnel field effect transistor with a Si and SiGe heterostructure for ultra low power applications

Author:
Asthana, Pranav Kumar   Goswami, Yogesh   Basak, Shibir   Rahi, Shiromani Balmukund   Ghosh, Bahniman   


Journal:
RSC Adv.


Issue Date:
2015


Abstract(summary):

In this paper, we present improved device characteristics of a Junctionless Tunnel Field Effect Transistor (JLTFET) with a Si and SiGe heterostructure. Optimization of the device is done for low power applications. Heterojunction engineering is done to optimize the position of the Si: SiGe junction. Subsequently, band gap engineering is incorporated using variations in doping, gate work function, the mole fraction of SiGe and the dielectric constant. Comparison of the optimized, heterostructured silicon channel using numerical simulations indicates that ION increases from 0.12 to 15 mu A mm(-1), I-ON/I-OFF increases from 4 x 10(6) to 3 x 10(9), and the subthreshold slope decreases from 80 to 43 mV dec(-1) for a 22 nm channel with a supply voltage of 0.7 V.


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