bottom of conduction band

简明释义

导带底

英英释义

例句

1.The electrons at the bottom of conduction band 导电带底部 can move freely, allowing for electrical conductivity.

在导电带底部的电子可以自由移动，从而允许电导性。

2.Understanding the properties of materials requires knowledge of the bottom of conduction band 导电带底部 and its relation to the valence band.

理解材料的性质需要了解导电带底部及其与价带的关系。

3.The thermal energy can excite electrons from the valence band to the bottom of conduction band 导电带底部, leading to increased conductivity.

热能可以使电子从价带激发到导电带底部，导致导电性增加。

4.In this experiment, we will measure the energy gap above the bottom of conduction band 导电带底部 to determine the material's conductivity.

在这个实验中，我们将测量位于导电带底部之上的能量间隙，以确定材料的导电性。

5.When a semiconductor is doped, the energy levels can shift, affecting the position of the bottom of conduction band 导电带底部.

当半导体被掺杂时，能级可能会发生变化，影响导电带底部的位置。

作文

In the world of solid-state physics and semiconductor technology, understanding the electronic properties of materials is crucial. One of the fundamental concepts in this field is the energy band structure, which describes the range of energy levels that electrons can occupy in a solid. The two primary bands of interest are the valence band and the conduction band. The bottom of conduction band (导电带底部) refers to the lowest energy level within the conduction band where electrons can reside. This concept is essential for explaining how materials conduct electricity and how they behave under various conditions.When we talk about semiconductors, the position of the bottom of conduction band (导电带底部) relative to the valence band determines whether a material will be a good conductor, an insulator, or a semiconductor. In metals, the conduction band overlaps with the valence band, allowing electrons to move freely and conduct electricity efficiently. In insulators, the gap between the valence band and the conduction band is large, meaning that very few electrons can gain enough energy to jump to the conduction band, resulting in poor conductivity.Semiconductors, on the other hand, have a smaller band gap, which allows some electrons to transition from the valence band to the bottom of conduction band (导电带底部) when energy is supplied, such as through thermal excitation or photon absorption. This property makes semiconductors incredibly valuable in modern electronics, as they can be manipulated to create devices like diodes and transistors.The position of the bottom of conduction band (导电带底部) can also be influenced by factors such as temperature, impurities, and external electric fields. For instance, doping a semiconductor with certain elements can introduce additional energy levels within the band structure, effectively lowering the energy required for electrons to reach the bottom of conduction band (导电带底部). This process enhances the material's conductivity and is a common technique used in the fabrication of electronic components.Moreover, understanding the bottom of conduction band (导电带底部) is vital for designing and optimizing photovoltaic cells. In solar cells, the efficiency of converting sunlight into electricity depends significantly on how well the absorbed photons can excite electrons from the valence band to the conduction band. A well-designed solar cell will ensure that a significant number of electrons can reach the bottom of conduction band (导电带底部), thus generating a usable electric current.In conclusion, the concept of the bottom of conduction band (导电带底部) is pivotal in understanding the electrical properties of materials. It plays a crucial role in determining the conductivity of semiconductors and metals and is essential for the development of various electronic devices. By grasping this concept, one can appreciate the intricate relationship between energy levels and electrical conductivity, which is fundamental to the advancement of technology in our modern world.