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Related Concept Videos

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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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
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Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
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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
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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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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.
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Semiconductor core fibres: materials science in a bottle.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Fiber Optics

Background:

  • Novel core fibers are crucial for optics, serving as sources, detectors, and nonlinear media.
  • The development of fibers with semiconductor cores opens possibilities for optoelectronic and electronic devices.

Purpose of the Study:

  • To review progress in glass-clad, crystalline core fibers, focusing on semiconducting cores.
  • To examine the materials science and post-processing techniques essential for these fibers.

Main Methods:

  • Review of existing literature on semiconductor core fiber development.
  • Analysis of materials science principles, including phase diagrams.
  • Evaluation of post-processing techniques like recrystallization and purification.

Main Results:

  • Progress in creating glass-clad fibers with crystalline semiconductor cores.
  • Understanding the critical role of materials science and post-processing in fiber performance.
  • Identification of key achievements and future research directions.

Conclusions:

  • Semiconducting core fibers represent a significant advancement in optical materials.
  • Effective materials science and post-processing are vital for realizing their potential in advanced applications.
  • Future prospects are closely linked to understanding and utilizing the phase diagrams of core materials.