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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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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...
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MOSFET: Enhancement Mode01:22

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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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Semiconductors01:22

Semiconductors

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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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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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Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
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Types of Semiconductors01:20

Types of Semiconductors

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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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Related Experiment Video

Updated: Apr 6, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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High-Performance WSe2 Complementary Metal Oxide Semiconductor Technology and Integrated Circuits.

Lili Yu1, Ahmad Zubair1, Elton J G Santos2

  • 1†Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.

Nano Letters
|July 21, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed air-stable tungsten disulfide (WSe2) complementary metal oxide semiconductor (CMOS) technology for high-performance electronics. This breakthrough enables low-power 2D material systems with efficient transistors suitable for integrated circuits.

Keywords:
CMOS electronicsTransition metal dichalcogenidesair stable dopingcomplementary logicintegrated circuitslow power electronics

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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials possess unique structural and electrical properties, making them promising for advanced electronic applications like transistors and integrated circuits.
  • A significant hurdle for 2D material applications is creating air-stable transistors compatible with industry-standard complementary metal oxide semiconductor (CMOS) technology.

Purpose of the Study:

  • To experimentally demonstrate a novel, high-performance, air-stable WSe2 CMOS technology.
  • To address the challenge of fabricating stable and efficient transistors for 2D material-based electronics.

Main Methods:

  • Fabrication of air-stable tungsten disulfide (WSe2) field-effect transistors.
  • Integration of WSe2 transistors into a CMOS inverter circuit.
  • Characterization of the inverter's electrical performance, including voltage transfer characteristics, logic swing, noise margin, voltage gain, and static power consumption.

Main Results:

  • Demonstration of a high-performance, air-stable WSe2 CMOS technology.
  • Achieved near-ideal voltage transfer characteristics, full logic swing, and high noise margins across various supply voltages.
  • The fabricated inverter exhibited a large voltage gain of approximately 38 and remarkably low static power consumption in the picowatt range.

Conclusions:

  • The developed WSe2 CMOS technology is stable in air and offers high performance.
  • This advancement paves the way for the development of low-power electronic systems utilizing 2D materials.
  • The findings represent a significant step towards the practical implementation of 2D materials in next-generation electronics.