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  4. On the Static and Dynamic Behavior of the Germanium Electron-Hole Bilayer Tunnel FET
 
research article

On the Static and Dynamic Behavior of the Germanium Electron-Hole Bilayer Tunnel FET

Lattanzio, Livio  
•
Dagtekin, Nilay
•
De Michielis, Luca  
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2012
IEEE Transactions on Electron Devices

Tunnel FETs (TFETs) are being intensively investigated for their potential in achieving subthermal switching slopes and extremely low leakage currents. Recently, a promising concept has been proposed: the electron-hole bilayer TFET (EHBTFET), which exploits carrier tunneling through a bias-induced electron-hole bilayer. In this paper, we show that, through appropriate optimization of the Ge EHBTFET, it is possible to achieve superior static characteristics at low supply voltages, when compared with a double-gate Ge MOSFET with similar geometry. The EHBTFET provides an improved average subthreshold slope (from 0 to vertical bar V-DD vertical bar = 0.25 V) of 30 mV/dec against 60 mV/dec at same vertical bar I-ON vertical bar similar to 0.18 mu A/mu m, doubled inverter gain, and larger noise margins, suggesting great potential for low-power applications. The dynamic behavior of the devices is investigated by transient simulations of simple circuits based on complementary inverters. Due to the increased total EHBTFET capacitance, the fanout-of-1 delay is larger than that in MOSFET, with 11 ns versus 4 ns at vertical bar V-DD vertical bar = 0.25 V. However, the EHBTFET results to be more robust than MOSFET for voltage scaling, as the leakage component is far from approaching the dynamic component of the total switching energy at low V-DD.

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Type
research article
DOI
10.1109/Ted.2012.2211600
Web of Science ID

WOS:000310385100010

Author(s)
Lattanzio, Livio  
•
Dagtekin, Nilay
•
De Michielis, Luca  
•
Ionescu, Adrian M.  
Date Issued

2012

Publisher

Ieee-Inst Electrical Electronics Engineers Inc

Published in
IEEE Transactions on Electron Devices
Volume

59

Issue

11

Start page

2932

End page

2938

Subjects

Band-to-band tunneling

•

electron-hole bilayer tunnel field-effect transistor (EHBTFET)

•

field-effect transistor (FET)

•

inverter

•

low-V-DD operation

•

Miller effect

•

noise margins (NMs)

•

ring oscillator

•

subthreshold slope (SS)

•

tunnel FET (TFET)

•

vertical tunneling

•

voltage transfer characteristics (VTC)

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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February 27, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/89309
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