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相关概念视频

Types of Semiconductors01:20

Types of Semiconductors

585
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...
585
Temperature and Thermal Equilibrium01:11

Temperature and Thermal Equilibrium

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Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
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P-N junction01:11

P-N junction

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
511
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

334
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...
334

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Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
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热电学中的间歇电.

Liqing Xu1,2, Zhanxiang Yin1, Yu Xiao1

  • 1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China.

Advanced materials (Deerfield Beach, Fla.)
|May 30, 2024
PubMed
概括
此摘要是机器生成的。

间歇性原子通过优化声子和电子传输,显著增强热电材料. 本综述强调了各种间歇性类型及其在改善热电性能方面的作用,为未来的材料开发提供了帮助.

关键词:
运输公司运输运营商运输运输它们是间歇性.音声传播的传播方式热电材料是一种热电材料.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学

背景情况:

  • 缺陷结构,特别是间隙原子,对于推进热电材料至关重要.
  • 间歇体在优化声子和电子运输特性方面发挥着关键作用.

研究的目的:

  • 提供热电材料中间歇性策略的全面概述.
  • 突出介质在优化热电参数中的重要性.
  • 讨论各种热电系统中间歇性策略的潜力.

主要方法:

  • 基于它们独特的作用 (声,解,间层,动态,液体) 的间层原子的分类.
  • 分析每个间歇类型如何影响声子和电子传输.
  • 对热电学中间歇工程现有文献的综述.

主要成果:

  • 的间位声通过共振分散声子.
  • 分离间位物阻断声子,并增强电子运输由于不同的平均自由路径.
  • 在分层化合物中,层间的间位物促进了层外的电子传输.
  • 动态间位器调整载体密度,并在广泛的温度范围内优化电气性能.
  • 液体间位物通过均分散来提高载体的移动性.

结论:

  • 所有已识别的间歇类型通过调整传输参数,对热电性能产生积极影响.
  • 间歇工程为开发高性能热电材料提供了一个有前途的途径.
  • 未来的研究应该探索将间歇性策略扩展到更广泛的热电系统中.