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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

619
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...
619
Characteristics of MOSFET01:17

Characteristics of MOSFET

527
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...
527
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

506
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...
506
MOSFET01:16

MOSFET

615
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...
615
Biasing of FET01:22

Biasing of FET

381
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.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
381
Characteristics of JFET01:21

Characteristics of JFET

699
Junction Field Effect Transistors (JFETs) exhibit specific operational characteristics based on the relationship between the drain current (id) and the drain-source voltage (Vds), along with varying gate-source voltages (Vgs).
The core of a JFET's operation is controlling drain current by modulating the gate-source voltage. When the drain and gate voltage are set to zero, the JFET exhibits no net current flow, representing a state of equilibrium. The drain current increases linearly as the...
699

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Updated: Sep 28, 2025

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
10:44

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

831

Developing molecular-level models for organic field-effect transistors.

Haoyuan Li1, Jean-Luc Brédas1

  • 1School of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332, USA.

National Science Review
|April 4, 2022
PubMed
Summary
This summary is machine-generated.

Organic field-effect transistors (OFETs) models are crucial for understanding organic semiconductor (OS) charge transport. This review details molecular-resolution models based on kinetic Monte Carlo simulations for hopping transport.

Keywords:
charge transportgradual channel approximationkinetic Monte Carlo simulationsmobility measurementsorganic semiconductors

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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Organic Electronics

Background:

  • Organic field-effect transistors (OFETs) are essential for characterizing organic semiconductor (OS) charge transport properties.
  • Accurate OFET device models are critical for understanding device performance and evaluating OS charge mobilities.
  • OS thin films can be amorphous or crystalline, influencing charge transport mechanisms.

Purpose of the Study:

  • To review the development of molecular-resolution OFET models.
  • To discuss models applicable to hopping charge transport in OSs.
  • To highlight the need for extending models for high-mobility OFETs.

Main Methods:

  • Focus on hopping transport mechanisms in OSs.
  • Utilize kinetic Monte Carlo (KMC) simulations.
  • Develop molecular-resolution OFET device models.

Main Results:

  • Recent advancements in molecular-resolution OFET models based on KMC are presented.
  • These models effectively capture charge transport in the hopping regime.
  • The limitations of current models for high-mobility OFETs are identified.

Conclusions:

  • Molecular-resolution OFET models are vital for accurate OS characterization.
  • KMC-based models provide insights into hopping transport.
  • Future models must incorporate charge delocalization for high-mobility applications.