hole density

简明释义

空穴密度

英英释义

例句

1.The hole density in this semiconductor material affects its electrical conductivity.

这种半导体材料中的孔密度影响其电导率。

2.The hole density is a critical factor in determining the efficiency of photodetectors.

在确定光电探测器效率时，孔密度是一个关键因素。

3.Increasing the hole density can enhance the charge carrier mobility in organic electronics.

增加孔密度可以提高有机电子设备中的载流子迁移率。

4.Researchers measured the hole density to optimize the performance of the solar cells.

研究人员测量了孔密度以优化太阳能电池的性能。

5.To achieve better light absorption, the hole density in the film needs to be carefully controlled.

为了实现更好的光吸收，薄膜中的孔密度需要被仔细控制。

作文

In the field of materials science, particularly in semiconductor physics, the term hole density refers to the concentration of holes in a material, which are essentially the absence of electrons in a semiconductor lattice. Understanding hole density is crucial for engineers and scientists as it directly influences the electrical properties of semiconductors. When we talk about holes, we are actually discussing the positive charge carriers that can significantly affect how well a material conducts electricity. To elaborate, in a semiconductor like silicon, when an electron from the valence band gains enough energy, it can jump into the conduction band, leaving behind a vacancy or 'hole' in the valence band. This vacancy behaves like a positive charge carrier, and its concentration is what we refer to as hole density (孔密度). The higher the hole density, the more charge carriers are available to conduct electricity, which enhances the material's conductivity.The manipulation of hole density is vital in the design and functioning of various electronic devices such as diodes, transistors, and integrated circuits. For instance, in p-type semiconductors, which are doped with elements that create more holes, the hole density is intentionally increased to improve the semiconductor's ability to conduct electricity. Conversely, in n-type semiconductors, where extra electrons are introduced, the hole density is lower, but understanding its role remains essential.Moreover, the relationship between hole density and temperature is also significant. As temperature increases, more electrons gain sufficient energy to jump to the conduction band, resulting in an increase in hole density. This phenomenon can lead to changes in the performance of electronic devices, making it necessary for engineers to account for temperature variations in their designs.In conclusion, hole density (孔密度) is a fundamental concept in semiconductor physics that plays a critical role in determining the electrical properties of materials. By understanding and manipulating hole density, scientists and engineers can enhance the performance of various electronic devices, paving the way for advancements in technology. As our reliance on semiconductors continues to grow, so too does the importance of mastering concepts like hole density to innovate and improve future electronic systems.

在材料科学领域，特别是半导体物理中，术语hole density（孔密度）指的是材料中孔的浓度，孔本质上是半导体晶格中电子的缺失。理解hole density对于工程师和科学家至关重要，因为它直接影响半导体的电气特性。当我们谈论孔时，实际上是在讨论可以显著影响材料导电性的正电荷载体。进一步阐述，在硅等半导体中，当价带中的一个电子获得足够的能量时，它可以跃迁到导带，留下一个空位或“孔”在价带中。这个空位表现得像一个正电荷载体，其浓度就是我们所称的hole density（孔密度）。hole density越高，可用于导电的电荷载体就越多，从而增强材料的导电性。操控hole density对于各种电子设备的设计和功能至关重要，例如二极管、晶体管和集成电路。例如，在p型半导体中，掺入创造更多孔的元素，故意提高hole density以改善半导体的导电能力。相反，在n型半导体中，引入额外的电子，hole density较低，但理解其作用仍然是必要的。此外，hole density与温度之间的关系也很重要。随着温度的升高，更多的电子获得足够的能量跃迁到导带，导致hole density增加。这种现象可能会导致电子设备性能的变化，因此工程师在设计中必须考虑温度变化。总之，hole density（孔密度）是半导体物理中的一个基本概念，对确定材料的电气特性发挥着关键作用。通过理解和操控hole density，科学家和工程师能够提升各种电子设备的性能，为技术进步铺平道路。随着我们对半导体的依赖不断增加，掌握如hole density这样的概念变得愈发重要，以便创新和改善未来的电子系统。