positive hole

简明释义

空穴

英英释义

例句

1.The concept of a positive hole 正孔 is crucial in understanding semiconductor behavior.

理解半导体行为时，正孔 positive hole的概念至关重要。

2.In electronics, a positive hole 正孔 represents the absence of an electron, allowing current to flow.

在电子学中，正孔 positive hole表示电子的缺失，从而使电流能够流动。

3.The physicist demonstrated how a positive hole 正孔 can influence charge carrier mobility.

物理学家演示了正孔 positive hole如何影响载流子的迁移率。

4.During the experiment, we observed a significant positive hole 正孔 formation in the material.

在实验过程中，我们观察到材料中形成了显著的正孔 positive hole。

5.The engineer explained that the design had a positive hole 正孔 to allow for better airflow.

工程师解释说，设计中有一个正孔 positive hole以便更好地通风。

作文

In the realm of physics and materials science, the term positive hole refers to a concept that is crucial for understanding the behavior of semiconductors. A positive hole is not a physical entity but rather a representation of an absence of an electron in a semiconductor's crystal lattice. When an electron is excited and moves away from its position, it leaves behind a vacancy, which can be thought of as a 'hole.' This 'hole' behaves like a positively charged particle because it can attract electrons from nearby atoms, allowing for the flow of electric current. The existence of positive holes is fundamental in explaining how p-type semiconductors operate. P-type semiconductors are created by adding certain impurities, known as acceptors, to intrinsic semiconductors. These acceptor atoms have fewer valence electrons than the semiconductor material, creating positive holes when they bond with the semiconductor. As a result, the material can conduct electricity more effectively as electrons move to fill these holes. Moreover, the mobility of positive holes plays a significant role in the efficiency of electronic devices. In a p-n junction, which is formed by combining p-type and n-type semiconductors, the interaction between positive holes and electrons leads to the creation of a depletion region. This region is critical for the operation of diodes and transistors, as it allows for the control of electrical current flow. The movement of positive holes toward the n-type side and electrons toward the p-type side establishes a built-in electric field that influences the behavior of charge carriers in the device. Understanding the concept of positive holes is essential for anyone studying modern electronics or materials science. It provides insight into how various components, such as solar cells, light-emitting diodes (LEDs), and integrated circuits, function. For instance, in solar cells, the generation of electron-hole pairs upon exposure to sunlight relies on the efficient movement of both electrons and positive holes. The better the mobility of these charge carriers, the more effective the solar cell will be in converting light into electrical energy. In conclusion, the term positive hole encapsulates a vital aspect of semiconductor physics. It is a concept that represents the absence of an electron, leading to the formation of a positively charged vacancy within a material. By understanding positive holes, we can better appreciate the mechanisms behind various electronic devices and their applications in our daily lives. As technology continues to advance, the role of positive holes in developing newer and more efficient materials will undoubtedly remain a topic of significant interest and research in the scientific community.

在物理学和材料科学领域，术语正孔指的是一个对于理解半导体行为至关重要的概念。正孔并不是一个物理实体，而是一个表示半导体晶格中缺少电子的概念。当一个电子被激发并离开其位置时，它会留下一个空位，可以被视为一个“孔”。这个“孔”表现得像一个带正电的粒子，因为它可以吸引来自附近原子的电子，从而允许电流的流动。正孔的存在是解释p型半导体如何运作的基础。p型半导体是通过向本征半导体中添加某些杂质（称为受体）来创建的。这些受体原子的价电子比半导体材料少，在与半导体结合时会形成正孔。因此，该材料能够更有效地导电，因为电子会移动填补这些孔。此外，正孔的迁移率在电子设备的效率中起着重要作用。在p-n结中，由p型和n型半导体组合而成，正孔和电子之间的相互作用导致了耗尽区的形成。该区域对于二极管和晶体管的操作至关重要，因为它允许控制电流的流动。正孔朝向n型一侧移动，电子朝向p型一侧移动，建立了影响器件中载流子行为的内建电场。理解正孔的概念对于任何学习现代电子学或材料科学的人来说都是必不可少的。它提供了对各种组件（如太阳能电池、发光二极管（LED）和集成电路）如何工作的深入了解。例如，在太阳能电池中，暴露于阳光下时产生的电子-孔对的生成依赖于电子和正孔的有效移动。载流子迁移率越高，太阳能电池将光转化为电能的效果就越好。总之，术语正孔概括了半导体物理学中的一个重要方面。它是一个表示缺少电子的概念，导致材料中形成一个带正电的空位。通过理解正孔，我们可以更好地欣赏各种电子设备及其在我们日常生活中的应用背后的机制。随着技术的不断进步，正孔在开发更新、更高效材料中的角色无疑将继续成为科学界的重要研究话题。