Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Photoelectric Effect02:26

Photoelectric Effect

38.7K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
38.7K
The Hall Effect01:30

The Hall Effect

3.9K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
3.9K
The Photochemical Reaction Center01:29

The Photochemical Reaction Center

5.1K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
5.1K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.2K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
2.2K
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

11.9K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
11.9K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

PEG-b-PCL Micelles as Nanocarriers for Poorly Soluble Benzimidazoles: A Comparative Study of Albendazole and Fenbendazole.

Molecules (Basel, Switzerland)·2026
Same author

Self-Assembled Monolayers at Photovoltaic Interfaces: Unveiling Structure-Property Relationships to Applications in Perovskite and Organic Solar Cells.

Journal of the American Chemical Society·2026
Same author

Author Correction: Exercise alleviates cognitive dysfunction in Alzheimer's disease mice via skeletal muscle-derived extracellular vesicles that enhance plaque clearance by microglia.

Nature aging·2026
Same author

Dual-Layer Grain-Boundary In Situ Polymerization Modulates Elastic Modulus for Mechanically Stable Flexible All-Perovskite Tandem Solar Cells.

ACS applied materials & interfaces·2026
Same author

Sulfonated Bathocuproine Derivatives as Chemically Bonded Buried-Interface Engineers for n-i-p Perovskite Solar Cells.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Fully Textured Monolithic Sb<sub>2</sub>S<sub>3</sub>/Silicon Tandem for Unbiased and Stable Solar-Driven Water Splitting Paired with Iodide Oxidation Reaction.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

相关实验视频

Updated: Jan 6, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.1K

载体分辨率的照片霍尔效应

Oki Gunawan1, Seong Ryul Pae2, Douglas M Bishop3

  • 1IBM T. J. Watson Research Center, Yorktown Heights, NY, USA. ogunawa@us.ibm.com.

Nature
|October 8, 2019
PubMed
概括

一种新的载体分辨率光技术可以同时测量半导体中的多数和少数电荷载体. 这一突破简化了半导体设备的表征,并加强了光电子设备的开发.

更多相关视频

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
05:45

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

Published on: March 31, 2022

3.0K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.8K

相关实验视频

Last Updated: Jan 6, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.1K
Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
05:45

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

Published on: March 31, 2022

3.0K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.8K

科学领域:

  • 半导体物理
  • 材料科学
  • 光电子产品

背景情况:

  • 半导体设备的性能取决于基本的电荷载体参数 (类型,密度,可移动性).
  • 传统的霍尔测量主要提取主要的载体特性.
  • 少数载体的表征通常需要单独的复杂技术.

研究的目的:

  • 开发一种统一的技术,同时测量多数电荷载体和少数电荷载体.
  • 为全面的半导体分析扩展经典的霍尔测量能力.
  • 允许同时访问载体类型,密度,可移动性,重组寿命,扩散时间和重组系数.

主要方法:

  • 采用载体分辨率的Hall技术.
  • 使用交替电流 (AC) 领域的进步与旋转平行双极线系统的哈尔测量.
  • 应用方程 ΔμH = d(σ2H) /dσ 相关的霍尔移动性差异,导电性和霍尔系数.

主要成果:

  • 证明同时提取多数和少数载体参数.
  • 成功地将该技术应用于各种太阳能吸收器,包括基矿.
  • 根据不同的光强度对载体参数进行映射,揭示以前无法获得的信息.

结论:

  • 运营商分辨率的Hall技术可以同时访问关键的多数和少数运营商信息.
  • 这种方法克服了少数航空公司的传统霍尔测量的局限性.
  • 该技术在光伏和其他光电子设备中具有广泛的潜在应用.