conduction band

简明释义

导带

英英释义

例句

1.The temperature increase can provide enough energy for electrons to jump from the valence band to the conduction band 导电带.

温度的升高可以提供足够的能量，使电子从价带跃迁到导电带 conduction band。

2.When light is absorbed by a semiconductor, electrons can be excited into the conduction band 导电带.

当半导体吸收光时，电子可以被激发到导电带 conduction band中。

3.Understanding the behavior of the conduction band 导电带 is crucial for designing efficient electronic devices.

理解导电带 conduction band的行为对于设计高效的电子设备至关重要。

4.In metals, the conduction band 导电带 is partially filled, which allows for high conductivity.

在金属中，导电带 conduction band是部分填充的，这使得其具有高导电性。

5.In semiconductors, electrons can move freely in the conduction band 导电带, allowing for electrical conduction.

在半导体中，电子可以在导电带 conduction band中自由移动，从而实现电导。

作文

The concept of the conduction band is fundamental in the field of solid-state physics and materials science. It refers to a range of energy levels in a solid where electrons can move freely, allowing for the conduction of electricity. In semiconductors and insulators, the conduction band plays a crucial role in determining their electrical properties. To understand the significance of the conduction band, one must first grasp the basic structure of atoms and how they interact in a solid material.Every atom consists of a nucleus surrounded by electrons that occupy specific energy levels or shells. When many atoms come together to form a solid, these energy levels combine and create bands of energy levels. The two most important bands in this context are the valence band and the conduction band. The valence band is filled with electrons that are bound to the atoms, while the conduction band is typically empty at absolute zero temperature.When energy is supplied to a solid, such as heat or light, some electrons can gain enough energy to jump from the valence band to the conduction band. This process is known as excitation. Once in the conduction band, these electrons are free to move throughout the material, contributing to electrical conductivity. The ability of a material to conduct electricity depends on the number of electrons that can be excited into the conduction band.In metals, the conduction band overlaps with the valence band, meaning that there are always free electrons available to conduct electricity. This is why metals are excellent conductors. In contrast, insulators have a large energy gap between the valence band and the conduction band, making it difficult for electrons to gain enough energy to jump into the conduction band. As a result, insulators do not conduct electricity well.Semiconductors, on the other hand, have a smaller energy gap between the valence band and the conduction band. This allows for some control over their electrical properties. By adding impurities in a process called doping, the number of charge carriers (electrons or holes) can be increased, making the semiconductor more conductive. This property is what makes semiconductors so valuable in modern electronics, allowing for the creation of transistors, diodes, and other essential components.In summary, the conduction band is a critical concept that helps explain how materials conduct electricity. Understanding the behavior of electrons in relation to the conduction band allows scientists and engineers to design better materials for various applications. Whether in the development of new electronic devices or the improvement of existing technologies, knowledge of the conduction band remains vital in advancing our understanding of electrical conductivity in solids. As we continue to explore the properties of materials, the conduction band will undoubtedly play a key role in shaping the future of technology.

导电带的概念在固态物理和材料科学领域中至关重要。它指的是固体中电子可以自由移动的能量级范围，从而允许电流的导通。在半导体和绝缘体中，导电带在决定其电气特性方面起着关键作用。要理解导电带的重要性，首先必须掌握原子的基本结构以及它们在固体材料中的相互作用。每个原子由一个核和围绕其周围的占据特定能量级或壳层的电子组成。当许多原子结合成一个固体时，这些能量级会结合并形成能量带。在这个背景下，两个最重要的带是价带和导电带。价带充满了被束缚在原子上的电子，而导电带在绝对零度温度下通常是空的。当能量被提供给固体，例如热量或光线时，一些电子可以获得足够的能量从价带跃迁到导电带。这个过程称为激发。一旦进入导电带，这些电子就可以在材料中自由移动，贡献电导率。材料导电能力的大小取决于能够被激发到导电带的电子数量。在金属中，导电带与价带重叠，这意味着总是有可用的自由电子来导电。这就是为什么金属是优秀导体的原因。相比之下，绝缘体在价带和导电带之间有一个较大的能量间隙，使得电子很难获得足够的能量跃迁到导电带。因此，绝缘体的导电性能较差。另一方面，半导体在价带和导电带之间有一个较小的能量间隙。这使得它们的电气特性可以被一定程度上控制。通过在称为掺杂的过程中添加杂质，可以增加载流子（电子或空穴）的数量，从而使半导体更具导电性。这种特性使得半导体在现代电子学中极具价值，允许制造晶体管、二极管和其他重要组件。总之，导电带是一个关键概念，有助于解释材料如何导电。理解电子与导电带之间的关系使科学家和工程师能够设计出更好的材料以用于各种应用。无论是在新电子设备的开发还是现有技术的改进中，对导电带的知识仍然对推进我们对固体电导性的理解至关重要。随着我们继续探索材料的特性，导电带无疑将在塑造未来技术方面发挥关键作用。