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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

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Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
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MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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...
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Biasing of FET01:22

Biasing of FET

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Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
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MOSFET01:16

MOSFET

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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
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Characteristics of MOSFET01:17

Characteristics of MOSFET

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Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
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...
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MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

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Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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2D Dual Gate Field-Effect Transistor Enabled Versatile Functions.

Yue Pang1, Yaoqiang Zhou1, Lei Tong1

  • 1Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, 999077, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 13, 2023
PubMed
Summary
This summary is machine-generated.

Molybdenum disulfide (MoS2) asymmetric-dual-gate field-effect transistors (ADGFETs) integrate logic, memory, and sensing. This 2D-material device achieves high performance for advanced computing applications.

Keywords:
2D materialsfloating gatelogic gatesnonvolatile memoryphototransistors

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Area of Science:

  • Materials Science and Engineering
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Advanced computing demands highly integrated, multifunctional electronic devices beyond traditional silicon technology.
  • Two-dimensional (2D) materials offer potential due to their ultra-thin bodies and dangling-bond-free surfaces.
  • Dual-gate transistors are crucial for enhanced control and functionality in next-generation electronics.

Purpose of the Study:

  • To design and investigate a novel molybdenum disulfide (MoS2) asymmetric-dual-gate field-effect transistor (ADGFET).
  • To explore the multifunctional capabilities of the ADGFET, including logic, nonvolatile memory, and photodetection.
  • To demonstrate the integration of multiple functions into a single device architecture for advanced computing.

Main Methods:

  • Fabrication of an ADGFET using molybdenum disulfide (MoS2) with an In2Se3 top gate and a global bottom gate.
  • Electrical characterization to evaluate on/off ratio, subthreshold swing, and logic functions.
  • Assessment of nonvolatile memory characteristics, including on/off ratio, retention time, and memory states.
  • Photodetection measurements to determine responsivity and photo-memory properties under varying illumination.

Main Results:

  • The ADGFET achieved a high on/off ratio of 10^6 with a low subthreshold swing of 94.3 mV dec^-1, exhibiting logic functionality.
  • The device demonstrated nonvolatile memory with an on/off ratio of 10^5 and a retention time over 10^4 s, supporting six memory states.
  • Tunable photodetection was achieved with a maximum responsivity of 857 A W^-1, and photo-memory properties were verified.

Conclusions:

  • The designed MoS2 ADGFET successfully integrates logic, memory, and sensing functionalities into a single device.
  • The independent control of double gates and their coupling effect are key to achieving high performance and multifunctionality.
  • This ADGFET architecture offers a promising alternative for developing highly integrated electronic devices for advanced computing and IoT applications.