recombination at surface

简明释义

表面再结合

英英释义

例句

1.Researchers observed that recombination at surface significantly reduced the charge carrier lifetime.

研究人员观察到表面重组显著降低了载流子的寿命。

2.The study focused on the effects of recombination at surface on the efficiency of solar cells.

这项研究集中于表面重组对太阳能电池效率的影响。

3.To improve performance, engineers aimed to minimize recombination at surface in the semiconductor material.

为了提高性能，工程师们旨在减少半导体材料中的表面重组。

4.In this experiment, we measured the impact of recombination at surface on light emission.

在这个实验中，我们测量了表面重组对光发射的影响。

5.The model predicted that recombination at surface would lead to energy losses in the device.

模型预测表面重组会导致设备中的能量损失。

作文

In the field of physics and materials science, the term recombination at surface refers to a critical process that occurs when charge carriers, such as electrons and holes, recombine at the surface of a material. This phenomenon plays a significant role in determining the efficiency of various electronic and optoelectronic devices. Understanding recombination at surface is essential for scientists and engineers who strive to improve the performance of solar cells, light-emitting diodes (LEDs), and semiconductor lasers.When a photon is absorbed in a semiconductor, it can generate an electron-hole pair. These charge carriers can move freely within the material; however, their journey is often interrupted by defects or impurities. As they travel towards the surface, some of these carriers may recombine before they can contribute to current or light emission. The rate of this recombination process at the surface is influenced by several factors, including the quality of the material, the presence of surface states, and the environment surrounding the material.For instance, in solar cells, recombination at surface can significantly reduce the overall efficiency of converting sunlight into electricity. When electrons reach the surface and encounter traps or defects, they may recombine with holes rather than contributing to the electrical output. This loss of charge carriers directly impacts the power conversion efficiency of the solar cell. Therefore, researchers are continuously investigating ways to minimize recombination at surface through surface passivation techniques, which involve applying thin layers of material that can effectively reduce the number of active surface states.Similarly, in LEDs, recombination at surface affects the brightness and color purity of the emitted light. If a significant number of electrons recombine at the surface instead of within the active region of the device, the light output will be diminished. Engineers focus on optimizing the design of LED structures to ensure that electrons and holes recombine efficiently in the desired region, thus maximizing light emission.The implications of recombination at surface extend beyond just solar cells and LEDs. In semiconductor lasers, for example, the efficiency of light generation can be hampered by excessive recombination at the surface. This phenomenon can lead to increased threshold currents, making the devices less efficient and more challenging to operate. Consequently, understanding and controlling recombination at surface is vital for advancing laser technology and developing new applications.In conclusion, the concept of recombination at surface is fundamental to the performance of many modern electronic and optoelectronic devices. It influences the efficiency of solar cells, the brightness of LEDs, and the operation of semiconductor lasers. By addressing the challenges associated with recombination at surface, researchers and engineers can pave the way for innovations that enhance the functionality and effectiveness of these technologies, ultimately leading to more sustainable energy solutions and advanced electronic systems.

在物理和材料科学领域，术语表面重组指的是在材料表面发生的一种关键过程，当电荷载流子，如电子和空穴，在材料的表面重新结合时。这一现象在决定各种电子和光电子设备的效率方面起着重要作用。理解表面重组对于努力提高太阳能电池、发光二极管（LED）和半导体激光器性能的科学家和工程师至关重要。当光子在半导体中被吸收时，它可以生成一个电子-空穴对。这些电荷载流子可以在材料中自由移动；然而，它们的旅程常常被缺陷或杂质打断。当它们向表面移动时，一些载流子可能会在它们能够贡献电流或光发射之前就重新结合。这个过程在表面的重组速率受到几个因素的影响，包括材料的质量、表面状态的存在以及材料周围的环境。例如，在太阳能电池中，表面重组可以显著降低将阳光转化为电力的整体效率。当电子到达表面并遇到捕获或缺陷时，它们可能会与空穴重新结合，而不是贡献于电输出。这种电荷载流子的损失直接影响太阳能电池的功率转换效率。因此，研究人员不断探索通过表面钝化技术来最小化表面重组的方法，这些技术涉及施加薄层材料，可以有效地减少活跃表面状态的数量。同样，在LED中，表面重组影响发射光的亮度和色彩纯度。如果大量电子在表面重新结合而不是在器件的活动区域内重新结合，光输出将会减弱。工程师专注于优化LED结构的设计，以确保电子和空穴在所需区域高效重新结合，从而最大限度地提高光发射。表面重组的影响不仅限于太阳能电池和LED。在半导体激光器中，例如，光生成的效率可能会因过度的表面重组而受到影响。这种现象可能导致阈值电流增加，使设备效率降低并且操作更加困难。因此，理解和控制表面重组对于推动激光技术的进步和开发新应用至关重要。总之，表面重组的概念是许多现代电子和光电子设备性能的基础。它影响太阳能电池的效率、LED的亮度和半导体激光器的操作。通过解决与表面重组相关的挑战，研究人员和工程师可以为增强这些技术的功能性和有效性铺平道路，最终导致更可持续的能源解决方案和先进的电子系统。