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Related Concept Videos

Semiconductors01:22

Semiconductors

1.6K
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...
1.6K
Types of Semiconductors01:20

Types of Semiconductors

1.5K
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...
1.5K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.1K
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...
1.1K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

625
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
625
Electron Carriers01:24

Electron Carriers

92.0K
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
92.0K
Electron Affinity03:07

Electron Affinity

43.4K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
43.4K

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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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Semiconductor Nanomembrane Materials for High-Performance Soft Electronic Devices.

Mikayla A Yoder1,2, Zheng Yan3, Mengdi Han4

  • 1School of Chemical Sciences , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States.

Journal of the American Chemical Society
|June 29, 2018
PubMed
Summary
This summary is machine-generated.

Researchers are developing thin, single-crystalline inorganic semiconductor nanomembranes for flexible electronics. These materials enable novel device architectures and tunable electronic properties for next-generation technologies.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • The synthesis and manipulation of single-crystalline inorganic semiconductor nanomembranes have spurred significant global research.
  • Nanomembranes offer unique properties like flexibility and lightweight characteristics for advanced electronics.

Purpose of the Study:

  • To review nanomembrane synthesis techniques and their applications in high-performance electronics.
  • To highlight the potential of nanomembranes in creating novel device form factors and 3D architectures.
  • To discuss challenges and future directions in nanomembrane-based device development.

Main Methods:

  • Examination of nanomembrane synthesis methodologies.
  • Analysis of precise and high-throughput manipulation techniques.
  • Review of material chemistry exploiting high-performance semiconductors like silicon nanomembranes, transition metal dichalcogenides, and phosphorene.

Main Results:

  • Nanomembranes enable conformal contact with curvilinear surfaces and strain-induced self-assembly of 3D nano/micro structures.
  • Quantum and size-dependent effects in thin semiconductors allow for bandgap engineering.
  • Demonstration of nanomembrane integration into flexible and unconventional electronic and optoelectronic devices.

Conclusions:

  • Nanomembranes represent a transformative platform for next-generation electronics and optoelectronics.
  • Continued advancements in nanomembrane chemistry and manipulation techniques are crucial for technological progress.
  • The unique properties of nanomembranes unlock new possibilities in device design and functionality.