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Related Concept Videos

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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 current...
Switching of BJT01:22

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are reverse-biased. The...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

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.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity arises...
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
Schottky Barrier Diode01:27

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Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...

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Related Experiment Video

Updated: May 14, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

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Published on: February 27, 2019

Electronic structure modulation for low-power switching.

Hassan Raza1

  • 1Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA, 52242, USA. hraza@engineering.uiowa.edu.

Nanoscale Research Letters
|February 15, 2013
PubMed
Summary

Researchers developed a novel transistor by manipulating electronic structure. This new device overcomes thermal limits, enabling enhanced performance and new applications in electronics.

Area of Science:

  • Condensed matter physics
  • Materials science
  • Device engineering

Background:

  • Conventional transistors face fundamental thermal limitations.
  • Subthreshold slope is a key metric for transistor efficiency.
  • Existing devices are constrained by the Boltzmann limit.

Purpose of the Study:

  • To introduce a novel transistor design.
  • To investigate the device physics governing its operation.
  • To demonstrate its performance beyond conventional limits.

Main Methods:

  • Fabrication of a novel transistor architecture.
  • Characterization of electronic transport properties.
  • Analysis of gate voltage-dependent current modulation.

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

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Last Updated: May 14, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

Main Results:

  • Demonstrated current modulation via electronic structure manipulation.
  • Achieved transistor gain.
  • Overcame the 2.3 kBT/decade thermal limit in inverse subthreshold slope.
  • Observed unique device physics.

Conclusions:

  • The novel transistor design offers superior performance.
  • Bandwidth manipulation of midgap states is a viable mechanism for transistor control.
  • The device's unique physics enables diverse novel applications.