large energy gap

简明释义

宽禁带

英英释义

例句

1.In quantum mechanics, a large energy gap 大能隙 can lead to quantized energy levels.

在量子力学中，大能隙 large energy gap 可以导致量子化能级。

2.The presence of a large energy gap 大能隙 in insulators makes them effective at preventing current flow.

绝缘体中存在的大能隙 large energy gap 使其有效地阻止电流流动。

3.Superconductors exhibit a large energy gap 大能隙 at low temperatures, allowing for zero resistance.

超导体在低温下表现出大能隙 large energy gap，允许零电阻。

4.In semiconductors, a large energy gap 大能隙 can prevent electrons from easily moving to the conduction band.

在半导体中，大能隙 large energy gap 会阻止电子轻易地移动到导带。

5.Materials with a large energy gap 大能隙 are often used in high-temperature applications.

具有大能隙 large energy gap 的材料通常用于高温应用。

作文

In the realm of physics and materials science, the concept of a large energy gap plays a crucial role in understanding the properties of various substances. The term refers to the significant difference in energy levels between the valence band and the conduction band in a solid. This phenomenon is particularly evident in insulators and semiconductors, where the large energy gap determines their electrical conductivity and optical properties.To elaborate, when we talk about an insulator, we refer to a material that does not conduct electricity well due to a large energy gap. In these materials, the energy required to excite an electron from the valence band to the conduction band is substantial, making it difficult for electrons to move freely. For example, materials like rubber or glass exhibit this characteristic, which is why they are commonly used as electrical insulators.On the other hand, semiconductors have a smaller energy gap compared to insulators but still possess a large energy gap relative to metals. This property allows them to conduct electricity under certain conditions, such as when they are doped with impurities or when exposed to light. The ability to manipulate the large energy gap in semiconductors is what makes them essential for modern electronics, including transistors and diodes, which are the building blocks of all electronic devices.The significance of a large energy gap extends beyond electrical conductivity; it also influences the optical properties of materials. For instance, materials with a large energy gap tend to absorb higher energy photons (such as ultraviolet light) and do not absorb lower energy photons (like visible light). This is why certain materials appear transparent to visible light while being opaque to ultraviolet radiation. Understanding this behavior is vital for applications in optics and photonics, where controlling light interaction with materials is paramount.Moreover, research into materials with engineered large energy gaps has led to advancements in solar cell technology. By creating materials with specific energy gaps, scientists can optimize the absorption of sunlight and improve the efficiency of solar panels. This pursuit not only enhances renewable energy technologies but also contributes to our efforts in combating climate change by promoting sustainable energy sources.In conclusion, the concept of a large energy gap is fundamental in various scientific fields, including physics, materials science, and engineering. It helps explain the electrical and optical properties of materials, guiding the development of technologies that shape our modern world. As we continue to explore and manipulate these energy gaps, we open doors to new innovations that can enhance our lives and contribute to a more sustainable future.

在物理学和材料科学领域，大能量间隙的概念在理解各种物质的特性方面起着至关重要的作用。这个术语指的是固体中价带和导带之间的能量水平显著差异。这种现象在绝缘体和半导体中尤为明显，其中的大能量间隙决定了它们的电导率和光学特性。进一步解释，当我们谈论绝缘体时，我们指的是由于大能量间隙而不良导电的材料。在这些材料中，将电子从价带激发到导带所需的能量很大，使得电子难以自由移动。例如，橡胶或玻璃等材料就表现出这一特性，这也是它们通常用作电绝缘体的原因。另一方面，半导体与绝缘体相比具有较小的能量间隙，但相对于金属仍然拥有大能量间隙。这一特性使它们在特定条件下能够导电，例如当它们掺杂杂质或暴露于光线下时。操控半导体中的大能量间隙的能力正是使它们成为现代电子产品的关键，如晶体管和二极管，它们是所有电子设备的基础。大能量间隙的重要性不仅限于电导率；它还影响材料的光学特性。例如，具有大能量间隙的材料往往吸收高能光子（如紫外光），而不吸收低能光子（如可见光）。这就是某些材料在可见光下呈透明而在紫外辐射下不透明的原因。理解这种行为对光学和光子学应用至关重要，在这些领域中，控制光与材料的相互作用是至关重要的。此外，对工程化大能量间隙材料的研究推动了太阳能电池技术的发展。通过创建具有特定能量间隙的材料，科学家可以优化阳光的吸收，提高太阳能电池板的效率。这一追求不仅增强了可再生能源技术，还有助于我们应对气候变化的努力，促进可持续能源的使用。总之，大能量间隙的概念在物理学、材料科学和工程等多个科学领域中都是基础性的。它有助于解释材料的电和光学特性，引导我们开发塑造现代世界的技术。随着我们继续探索和操控这些能量间隙，我们为新的创新打开了大门，这些创新能够改善我们的生活并为更可持续的未来做出贡献。