Related Experiment Video
Updated: Jul 25, 2025

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
Switching performance assessment of gate-all-around InAs-Si vertical TFET with triple metal gate, a simulation study
Dariush Madadi1, Saeed Mohammadi2
1Department of Engineering Sciences, Faculty of Technology and Engineering, Semnan University, Semnan, Iran. Madadi@semnan.ac.ir.
Abstract:
This study presents a gate-all-around InAs-Si vertical tunnel field-effect transistor with a triple metal gate (VTG-TFET). We obtained improved switching characteristics for the proposed design because of the improved electrostatic control on the channel and the narrow bandgap source. It shows an Ion of 392 μA/μm, an Ioff of 8.8 × 10-17 A/μm, an Ion/Ioff ratio of about 4.4 × 1012, and a minimum subthreshold slope of 9.3 mV/dec at Vd = 1 V. We also analyze the influence of the gate oxide and metal work functions on the transistor characteristics. A numerical device simulator, calibrated to the experimental data of a vertical InAs-Si gate all around TFET, is used to accurately predict different features of the device. Our simulations demonstrate that the proposed vertical TFET, as a fast-switching and very low power device, is a promising transistor for digital applications.
Related Concept Videos
Biasing of FET
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
Biasing of Metal-Semiconductor Junctions
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
MOSFET
In an n-MOSFET, the structure includes n-type source and drain...
MOSFET: Enhancement Mode
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
Characteristics of MOSFET
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Field Effect Transistor

