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Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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 semiconductor's...
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...
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...
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.
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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.
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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
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Energy Dissipation in Monolayer MoS2 Electronics.

Eilam Yalon1, Connor J McClellan1, Kirby K H Smithe1

  • 1Department of Electrical Engineering, ‡Department of Chemistry, §Department of Materials Science and Engineering, and ∥Precourt Institute for Energy, Stanford University , Stanford, California 94305, United States.

Nano Letters
|April 9, 2017
PubMed
Summary
This summary is machine-generated.

Researchers measured temperature in 2D monolayer molybdenum disulfide (MoS2) transistors. They found the thermal boundary conductance at the MoS2/SiO2 interface is higher than expected, aiding energy-efficient 2D electronics design.

Keywords:
2D semiconductorsEnergy dissipationMoS2Raman thermometrythermal boundary conductance

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid-State Physics

Background:

  • Energy dissipation is a key challenge limiting nanoscale electronics advancement.
  • Two-dimensional (2D) semiconductors face severe thermal bottlenecks, especially in flexible or multilayered applications.

Purpose of the Study:

  • To directly measure spatially resolved temperature in functioning 2D monolayer MoS2 transistors.
  • To investigate thermal boundary conductance at the MoS2/SiO2 interface.
  • To understand self-heating effects in 2D semiconductor transistors.

Main Methods:

  • Utilized Raman thermometry for direct temperature mapping.
  • Simultaneously measured temperature of the device channel and substrate.
  • Performed differential temperature measurements.

Main Results:

  • Determined the thermal boundary conductance of the MoS2/SiO2 interface to be 14 ± 4 MW m-2 K-1, an order of magnitude higher than previously estimated.
  • Observed that transistor non-uniformities, such as bilayer regions, do not significantly increase self-heating.
  • Found 2D semiconductors to be less sensitive to inhomogeneity than anticipated.

Conclusions:

  • The MoS2/SiO2 interface exhibits substantial thermal boundary conductance.
  • 2D semiconductors demonstrate resilience to structural non-uniformities regarding self-heating.
  • Findings provide crucial data for designing energy-efficient 2D electronic devices.