luminescence center

简明释义

发光中心

英英释义

例句

1.The research team discovered a new type of luminescence center in the crystal structure, which enhances light emission.

研究团队在晶体结构中发现了一种新的发光中心，它增强了光的发射。

2.Scientists are investigating how different impurities affect the properties of the luminescence center in semiconductors.

科学家正在研究不同杂质如何影响半导体中发光中心的特性。

3.The efficiency of the LED is largely determined by the quality of its luminescence center.

LED的效率在很大程度上取决于其发光中心的质量。

4.In photonics, understanding the role of the luminescence center is crucial for developing efficient light sources.

在光子学中，理解发光中心的作用对开发高效光源至关重要。

5.The luminescence center can be activated by thermal energy, leading to increased brightness in the material.

发光中心可以通过热能激活，从而使材料的亮度增加。

作文

Luminescence is a phenomenon that occurs when certain materials emit light without the involvement of heat. This intriguing process has captivated scientists and researchers for decades, leading to numerous applications in various fields. One of the key components responsible for this emission of light is known as the luminescence center. A luminescence center refers to a specific site within a material where the excitation and subsequent relaxation of electrons occur, resulting in the release of energy in the form of light. Understanding the nature and behavior of luminescence centers is essential for harnessing their potential in practical applications.The study of luminescence centers spans multiple disciplines, including physics, chemistry, and materials science. These centers can be found in a variety of substances, such as phosphors, semiconductors, and biological materials. For instance, in phosphorescent materials, the luminescence center is often a rare earth ion or a transition metal ion. When these ions are excited by an external energy source, they can trap the energy temporarily before releasing it as visible light. This property is why glow-in-the-dark products, which utilize phosphors, can emit light long after being exposed to a light source.In semiconductors, the luminescence center can be a defect or impurity that alters the electronic structure of the material. These defects create localized energy levels within the band gap, allowing for the recombination of electrons and holes, which subsequently leads to light emission. Such mechanisms are crucial in the development of light-emitting diodes (LEDs) and laser diodes, which have revolutionized lighting and display technologies.Bioluminescence is another fascinating area where luminescence centers play a significant role. Certain organisms, such as fireflies and some species of jellyfish, possess natural luminescence centers that enable them to produce light through biochemical reactions. In these cases, the light is generated by the enzyme luciferase acting on a substrate called luciferin. The study of these natural luminescence centers not only provides insights into biological processes but also inspires innovations in biotechnology and medical imaging.The understanding of luminescence centers has led to advancements in various technologies, including displays, sensors, and bioimaging techniques. For example, in the field of bioimaging, luminescent markers are used to visualize biological processes in real time. By attaching a luminescence center to a specific molecule, researchers can track the movement and interaction of cells, providing valuable information for medical research and drug development.In conclusion, the luminescence center is a fundamental concept in the study of luminescence that has far-reaching implications across multiple scientific and technological domains. Its ability to facilitate the emission of light has led to innovations in materials, electronics, and biology. As research continues to uncover the intricacies of luminescence centers, we can expect to see even more groundbreaking applications that will enhance our understanding of light and its myriad uses in our daily lives. Whether in the form of glowing toys, efficient lighting solutions, or advanced medical imaging techniques, the impact of luminescence centers is undeniable and ever-expanding.

发光是一种现象，当某些材料在没有热量参与的情况下发出光时就会发生这种现象。这一引人注目的过程吸引了科学家和研究人员数十年的关注，导致其在各个领域的众多应用。负责这种光发射的关键组成部分被称为发光中心。发光中心是指材料内部的特定位置，在该位置中，电子的激发和随后的放松发生，从而以光的形式释放能量。理解发光中心的性质和行为对于利用其在实际应用中的潜力至关重要。对发光中心的研究跨越多个学科，包括物理学、化学和材料科学。这些中心可以在各种物质中找到，例如荧光粉、半导体和生物材料。例如，在磷光材料中，发光中心通常是稀土离子或过渡金属离子。当这些离子受到外部能量源的激发时，它们可以暂时捕获能量，然后以可见光的形式释放出来。这种特性就是为什么发光玩具（利用荧光粉）能够在暴露于光源后很长时间内发出光。在半导体中，发光中心可以是改变材料电子结构的缺陷或杂质。这些缺陷在带隙内创建局部能级，使电子和空穴的复合成为可能，随后导致光的发射。这些机制在发光二极管（LED）和激光二极管的发展中至关重要，这些技术彻底改变了照明和显示技术。生物发光是另一个迷人的领域，其中发光中心发挥着重要作用。某些生物体，如萤火虫和某些种类的水母，拥有自然的发光中心，使它们能够通过生化反应产生光。在这些情况下，光是由酶荧光素酶作用于底物荧光素生成的。对这些自然发光中心的研究不仅提供了对生物过程的深刻见解，还激发了生物技术和医学成像方面的创新。对发光中心的理解推动了显示器、传感器和生物成像技术等各种技术的进步。例如，在生物成像领域，荧光标记用于实时可视化生物过程。通过将发光中心附加到特定分子上，研究人员可以跟踪细胞的运动和相互作用，为医学研究和药物开发提供有价值的信息。总之，发光中心是发光研究中的一个基本概念，对多个科学和技术领域具有深远的影响。它促进光的发射能力导致材料、电子和生物学方面的创新。随着研究继续揭示发光中心的复杂性，我们可以期待看到更多突破性的应用，这将增强我们对光及其在日常生活中众多用途的理解。无论是以发光玩具的形式、高效的照明解决方案，还是先进的医学成像技术，发光中心的影响都是不可否认且不断扩展的。