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Related Concept Videos

Characteristics of MOSFET01:17

Characteristics of MOSFET

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 quicker...
MOSFET01:16

MOSFET

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...
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: 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...
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...
MOSFET Amplifiers01:17

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...

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Related Experiment Video

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

Single-layer MoS2 transistors.

B Radisavljevic1, A Radenovic, J Brivio

  • 1Electrical Engineering Institute, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland.

Nature Nanotechnology
|February 1, 2011
PubMed
Summary
This summary is machine-generated.

High-performance transistors were created using single-layer molybdenum disulfide (MoS2). This breakthrough achieves high electron mobility and low power consumption for next-generation electronics.

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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials offer advantages for nanoelectronics due to facile complex structure fabrication.
  • Graphene, a prominent 2D material, lacks a bandgap crucial for transistor applications, and engineering one is complex.
  • Single-layer molybdenum disulfide (MoS2) possesses a large bandgap but previously exhibited insufficient electron mobility for practical devices.

Purpose of the Study:

  • To enhance the electron mobility of single-layer MoS2 for viable nanoelectronic applications.
  • To demonstrate the potential of MoS2 in creating high-performance transistors with low power consumption.

Main Methods:

  • Fabrication of transistors utilizing single-layer MoS2 as the active semiconductor layer.
  • Employing a hafnium oxide (HfO2) gate dielectric to improve electrical characteristics.
  • Characterization of device performance at room temperature, including electron mobility and current on/off ratios.

Main Results:

  • Achieved a room-temperature electron mobility of at least 200 cm(2) V(-1) s(-1) in single-layer MoS2 transistors.
  • Demonstrated transistors with a high room-temperature current on/off ratio of 1 × 10(8).
  • Observed ultralow standby power dissipation in the fabricated MoS2 devices.

Conclusions:

  • Single-layer MoS2, when processed with appropriate dielectrics, can achieve mobilities comparable to graphene nanoribbons.
  • MoS2 transistors exhibit excellent performance metrics, including high on/off ratios and low power consumption, suitable for advanced electronics.
  • The direct bandgap of monolayer MoS2 enables its use in energy-efficient interband tunnel FETs and complements graphene in optoelectronics.