absorption edge

简明释义

吸收端

英英释义

例句

1.Researchers noted that the absorption edge of the alloy was significantly lower than that of the pure metal.

研究人员注意到该合金的吸收边缘明显低于纯金属。

2.By analyzing the absorption edge, scientists can infer the electronic structure of the material.

通过分析吸收边缘，科学家可以推断材料的电子结构。

3.The measurement of the absorption edge is crucial for determining the bandgap of a semiconductor material.

测量吸收边缘对确定半导体材料的带隙至关重要。

4.The absorption edge of a material can shift depending on its chemical composition.

材料的吸收边缘可以根据其化学成分而变化。

5.In X-ray spectroscopy, the absorption edge indicates the energy level at which electrons are ejected from atoms.

在X射线光谱学中，吸收边缘表示电子从原子中逸出的能量水平。

作文

The concept of the absorption edge is fundamental in understanding how materials interact with light, especially in the field of physics and materials science. The absorption edge refers to the specific wavelength or energy level at which a material begins to absorb photons, leading to electronic transitions within the material. This phenomenon is crucial for various applications, including photovoltaics, photodetectors, and even in understanding the properties of semiconductors.When light encounters a material, it can either be reflected, transmitted, or absorbed. The absorption edge marks the transition between the transmission of light and its absorption. Below this edge, the material is typically transparent, while above it, the material becomes opaque as it starts to absorb higher energy photons. This behavior can be attributed to the electronic structure of the material, particularly the band gap—the energy difference between the valence band and the conduction band.For instance, in semiconductors, the absorption edge is closely related to the band gap energy. Materials with a small band gap will have their absorption edge at lower energy levels, allowing them to absorb visible light, while those with larger band gaps will only absorb ultraviolet light. This property is exploited in designing solar cells, where materials are chosen based on their absorption edge to maximize sunlight absorption and convert it into electrical energy efficiently.In addition to solar energy applications, the absorption edge is also significant in the field of spectroscopy. Techniques such as UV-Vis spectroscopy rely on the absorption edge to determine the electronic properties of materials. By analyzing the absorption edge, scientists can infer information about the band structure, impurities, and defects in the material, which are critical for developing new materials and improving existing ones.Furthermore, the absorption edge can shift due to various factors, including temperature, pressure, and chemical composition. For example, when a semiconductor is doped with different elements, the absorption edge may change, indicating alterations in its electronic properties. This tunability is essential for developing tailored materials for specific applications, such as sensors and optoelectronic devices.In conclusion, the absorption edge is a key concept that plays a vital role in various scientific and technological fields. Understanding this phenomenon allows researchers and engineers to manipulate materials for desired optical properties, paving the way for advancements in renewable energy, electronics, and materials science. As technology continues to evolve, the importance of the absorption edge will undoubtedly grow, leading to innovative solutions and applications that harness the power of light.

“吸收边缘”这一概念在理解材料如何与光相互作用方面是基础性的，特别是在物理学和材料科学领域。“吸收边缘”指的是材料开始吸收光子、导致材料内部电子跃迁的特定波长或能量水平。该现象对于各种应用至关重要，包括光伏、光探测器，甚至在理解半导体特性方面。当光遇到材料时，它可以被反射、透射或吸收。“吸收边缘”标志着光的透射与吸收之间的过渡。在这个边缘以下，材料通常是透明的，而在这个边缘以上，材料变得不透明，因为它开始吸收更高能量的光子。这种行为可以归因于材料的电子结构，特别是带隙——价带与导带之间的能量差。例如，在半导体中，“吸收边缘”与带隙能量密切相关。带隙较小的材料将在较低能量水平上具有其“吸收边缘”，使其能够吸收可见光，而带隙较大的材料则仅吸收紫外光。这一特性被用于设计太阳能电池，其中根据其“吸收边缘”选择材料，以最大化阳光吸收并有效地将其转化为电能。除了太阳能应用外，“吸收边缘”在光谱学领域也很重要。诸如紫外-可见光谱法等技术依赖于“吸收边缘”来确定材料的电子特性。通过分析“吸收边缘”，科学家可以推断出关于材料的带结构、杂质和缺陷的信息，这对于开发新材料和改善现有材料至关重要。此外，由于温度、压力和化学成分等各种因素，“吸收边缘”可能会发生位移。例如，当对半导体进行掺杂时，“吸收边缘”可能会变化，表明其电子特性的改变。这种可调性对于开发特定应用的定制材料（如传感器和光电设备）至关重要。总之，“吸收边缘”是一个关键概念，在各种科学和技术领域发挥着重要作用。理解这一现象使研究人员和工程师能够操纵材料以获得所需的光学特性，为可再生能源、电子和材料科学的进步铺平道路。随着技术的不断发展，“吸收边缘”的重要性无疑将增长，导致利用光的力量的创新解决方案和应用。