当前位置：
X-MOL 学术
›
Chem. Rev.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Multicarrier Dynamics in Quantum Dots
Chemical Reviews ( IF 51.4 ) Pub Date : 2021-01-11 , DOI: 10.1021/acs.chemrev.0c00931 Christopher Melnychuk 1 , Philippe Guyot-Sionnest 1
Chemical Reviews ( IF 51.4 ) Pub Date : 2021-01-11 , DOI: 10.1021/acs.chemrev.0c00931 Christopher Melnychuk 1 , Philippe Guyot-Sionnest 1
Affiliation
|
Multicarrier dynamics play an essential role in quantum dot photophysics and photochemistry, and they are primarily governed by nonradiative Auger processes. Auger recombination affects the performance of lasers, light-emitting diodes, and photodetectors, and it has been implicated in fluorescence intermittency phenomena which are relevant in microscopy and biological tagging. Auger cooling is an important mechanism of rapid electron thermalization. Inverse Auger recombination, known as impact ionization, results in carrier multiplication which can enhance the efficiencies of solar cells. This article first reviews the physical picture, theoretical framework and experimental data for Auger processes in bulk crystalline semiconductors. With this context these aspects are then reexamined for nanocrystal quantum dots, and we first consider fundamental features of Auger recombination in these systems. Methods for the chemical control of Auger recombination and Auger cooling are then discussed in the context of how they illuminate the underlying mechanisms, and we also examine the current understanding of carrier multiplication in quantum dots. Manifestations of Auger recombination in quantum dot devices are finally considered, and we conclude the article with a perspective on remaining unknowns in quantum dot multicarrier physics.
中文翻译：
量子点中的多载波动力学
多载流子动力学在量子点光物理和光化学中起着至关重要的作用，并且主要受非辐射俄歇过程的控制。俄歇复合影响激光，发光二极管和光电探测器的性能，并且已经涉及到与显微镜和生物标记有关的荧光间歇现象。俄歇冷却是快速电子热化的重要机制。反向俄歇复合，称为碰撞电离，导致载流子倍增，可以提高太阳能电池的效率。本文首先回顾了体晶半导体中俄歇过程的物理图片，理论框架和实验数据。在这种情况下，我们将重新审查这些方面的纳米晶体量子点，我们首先考虑这些系统中俄歇重组的基本特征。然后在它们如何阐明潜在机理的背景下讨论了俄歇重组和俄歇冷却的化学控制方法，并且我们还研究了当前对量子点中载流子增殖的理解。最后考虑了量子点器件中俄歇复合的表现形式，并且本文以量子点多载波物理中尚存的未知数为视角来结束本文。
更新日期：2021-02-24
中文翻译：
量子点中的多载波动力学
多载流子动力学在量子点光物理和光化学中起着至关重要的作用，并且主要受非辐射俄歇过程的控制。俄歇复合影响激光，发光二极管和光电探测器的性能，并且已经涉及到与显微镜和生物标记有关的荧光间歇现象。俄歇冷却是快速电子热化的重要机制。反向俄歇复合，称为碰撞电离，导致载流子倍增，可以提高太阳能电池的效率。本文首先回顾了体晶半导体中俄歇过程的物理图片，理论框架和实验数据。在这种情况下，我们将重新审查这些方面的纳米晶体量子点，我们首先考虑这些系统中俄歇重组的基本特征。然后在它们如何阐明潜在机理的背景下讨论了俄歇重组和俄歇冷却的化学控制方法，并且我们还研究了当前对量子点中载流子增殖的理解。最后考虑了量子点器件中俄歇复合的表现形式，并且本文以量子点多载波物理中尚存的未知数为视角来结束本文。
京公网安备 11010802027423号