nonradiative transition

简明释义

无辐射跃迁

英英释义

例句

1.In photonics, a nonradiative transition 非辐射跃迁 can occur when energy is transferred between molecules without the emission of photons.

在光子学中，非辐射跃迁 nonradiative transition 可以发生在分子之间能量转移时，而不发射光子。

2.Researchers are studying the role of nonradiative transitions 非辐射跃迁 in fluorescence quenching mechanisms.

研究人员正在研究非辐射跃迁 nonradiative transitions 在荧光猝灭机制中的作用。

3.In semiconductor physics, nonradiative transitions 非辐射跃迁 are critical for understanding carrier dynamics.

在半导体物理中，非辐射跃迁 nonradiative transitions 对理解载流子动力学至关重要。

4.The efficiency of solar cells can be improved by minimizing nonradiative transitions 非辐射跃迁 that waste absorbed energy.

通过最小化浪费吸收能量的非辐射跃迁 nonradiative transitions，可以提高太阳能电池的效率。

5.The presence of defects in a crystal can enhance nonradiative transitions 非辐射跃迁, leading to lower luminescence efficiency.

晶体中的缺陷可以增强非辐射跃迁 nonradiative transitions，导致发光效率降低。

作文

In the realm of physics and material science, understanding the mechanisms of energy transfer is crucial for various applications, including photovoltaics, lasers, and photonic devices. One important concept that often arises in these discussions is the phenomenon of nonradiative transition. This term refers to a process where an excited electron in a material returns to its ground state without emitting a photon. Instead of releasing energy in the form of light, the energy is dissipated through other means, such as vibrations within the lattice structure of the material or through collisions with other particles.To grasp the significance of nonradiative transition, we must first consider the alternative: radiative transitions. In a radiative transition, when an electron drops from a higher energy level to a lower one, it emits a photon, which is visible as light. This process is fundamental to the operation of many light-emitting devices, such as LEDs and lasers. However, not all excited states lead to photon emission. In many materials, especially those with complex structures or impurities, the likelihood of a nonradiative transition occurring increases.The implications of nonradiative transition are profound, particularly in the field of optoelectronics. For instance, in solar cells, the efficiency of light absorption and conversion into electricity can be significantly affected by nonradiative processes. When photons are absorbed and excite electrons, if these electrons undergo a nonradiative transition instead of a radiative one, the energy is lost as heat rather than being converted into electrical energy. This loss can limit the overall efficiency of solar cells, making it essential for researchers to develop materials that minimize nonradiative losses.Moreover, nonradiative transition plays a critical role in the design of phosphorescent materials and quantum dots. In these applications, controlling the balance between radiative and nonradiative processes can determine the brightness and longevity of emitted light. For example, in phosphorescent materials, certain dopants can enhance radiative transitions while suppressing nonradiative transition, leading to longer-lasting glow effects. Understanding these interactions allows scientists to engineer materials with desired optical properties.Another area where nonradiative transition is significant is in the study of biological systems. Many biological molecules, such as chlorophyll, utilize nonradiative processes to efficiently transfer energy during photosynthesis. In this context, the ability of molecules to undergo nonradiative transition helps facilitate energy transfer without the loss of energy as light, enabling plants to convert sunlight into chemical energy effectively.In conclusion, the concept of nonradiative transition is essential for understanding energy transfer in various scientific fields. It highlights the importance of energy dissipation mechanisms that do not involve photon emission and underscores the challenges faced in optimizing devices that rely on light emission and absorption. As research continues to explore new materials and methods to control these transitions, the potential for advancements in technology remains vast. By minimizing nonradiative transition losses, we may improve the efficiency of solar cells, enhance the performance of light-emitting devices, and even unlock new possibilities in biological energy transfer mechanisms.

在物理和材料科学领域，理解能量转移的机制对于光伏、激光器和光子设备等各种应用至关重要。在这些讨论中，一个重要的概念是非辐射跃迁现象。这个术语指的是材料中一个激发电子返回其基态而不发射光子的过程。相反，能量通过其他方式耗散，例如材料的晶格结构内的振动或与其他粒子的碰撞。要理解非辐射跃迁的重要性，我们必须首先考虑替代方案：辐射跃迁。在辐射跃迁中，当电子从较高能级降到较低能级时，它会发射一个光子，这在可见光中表现为光。这个过程是许多发光设备（如LED和激光器）操作的基础。然而，并非所有激发态都会导致光子的发射。在许多材料中，特别是那些具有复杂结构或杂质的材料中，发生非辐射跃迁的可能性增加。非辐射跃迁的影响是深远的，尤其是在光电电子学领域。例如，在太阳能电池中，光的吸收和转化为电能的效率可以受到非辐射过程的显著影响。当光子被吸收并激发电子时，如果这些电子经历非辐射跃迁而不是辐射跃迁，能量就会作为热量损失，而不是转化为电能。这种损失可能限制太阳能电池的整体效率，因此研究人员需要开发能够最小化非辐射损失的材料。此外，非辐射跃迁在磷光材料和量子点的设计中也起着关键作用。在这些应用中，控制辐射和非辐射过程之间的平衡可以决定发光的亮度和持久性。例如，在磷光材料中，某些掺杂剂可以增强辐射跃迁，同时抑制非辐射跃迁，从而导致更持久的发光效果。理解这些相互作用使科学家能够设计具有所需光学特性的材料。非辐射跃迁在生物系统的研究中也很重要。许多生物分子，如叶绿素，利用非辐射过程在光合作用中有效地转移能量。在这种情况下，分子经历非辐射跃迁的能力有助于促进能量转移，而不会将能量以光的形式损失，从而使植物能够有效地将阳光转化为化学能。总之，非辐射跃迁的概念对于理解各个科学领域中的能量转移至关重要。它突显了不涉及光子发射的能量耗散机制的重要性，并强调了在优化依赖于光发射和吸收的设备时面临的挑战。随着研究不断探索新材料和控制这些跃迁的方法，技术进步的潜力仍然巨大。通过最小化非辐射跃迁损失，我们可以提高太阳能电池的效率，增强发光设备的性能，甚至解锁生物能量转移机制的新可能性。