Carrier Dynamics in Alloyed Chalcogenide Quantum Dots and Their Light-Emitting Devices,Advanced Energy Materials

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Carrier Dynamics in Alloyed Chalcogenide Quantum Dots and Their Light-Emitting Devices
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-09-15 , DOI: 10.1002/aenm.202101693
Zhaohan Li _{1,

2} , Jing Wei ₁ , Fangfang Wang ₃ , Yanan Tang ₂ , Anming Li ₂ , Yating Guo ₁ , Pan Huang ₁ , Sergio Brovelli ₄ , Huaibin Shen ₃ , Hongbo Li ₁

Affiliation

Light-emitting devices based on alloyed quantum dots have reached external quantum efficiencies above 20% in red, green, and blue emission devices. Their outstanding performances including high efficiency, long-term device stability, and suppressed efficiency roll-off identify alloyed-quantum-dot based light-emitting devices as good candidates for next generation solid-state lightings and displays. All these advantages stem from the chemical composition gradient of alloyed quantum dots in radial direction. The chemical composition gradient enables the lattice strain to be released gradually, eventually decreasing interface defects and suppressing Auger recombination. Carrier dynamics play a crucial role in the fundamental properties and functionalities of quantum dots for solid-state devices and light-emitting devices. A more in-depth understanding of carrier dynamics in quantum dots is therefore of both fundamental and technological significance. This review article provides an overview on recent advances in the study and understanding of carrier dynamics of alloyed quantum dots and alloyed-quantum-dot based light-emitting devices. Particular emphasis is placed on the relationship between Auger recombination and optical properties and optoelectronic properties. This review is expected to encourage further research in alloyed quantum dots and related devices and to stimulate new synthesis efforts to produce stable alloyed quantum dots with further improved control of carrier dynamics.

中文翻译：

合金硫属化物量子点及其发光器件中的载流子动力学

基于合金量子点的发光器件在红色、绿色和蓝色发射器件中的外量子效率已达到 20% 以上。其出色的性能包括高效率、长期器件稳定性和抑制效率滚降，使基于合金量子点的发光器件成为下一代固态照明和显示器的良好候选者。所有这些优点都源于合金量子点在径向上的化学成分梯度。化学成分梯度使晶格应变逐渐释放，最终减少界面缺陷并抑制俄歇复合。载流子动力学在用于固态器件和发光器件的量子点的基本特性和功能中起着至关重要的作用。因此，更深入地了解量子点中的载流子动力学具有基础和技术意义。这篇综述文章概述了合金量子点和基于合金量子点的发光器件的载流子动力学的研究和理解的最新进展。特别强调俄歇复合与光学特性和光电特性之间的关系。该综述有望鼓励对合金量子点和相关设备的进一步研究，并激发新的合成努力，以生产稳定的合金量子点，并进一步改进对载流子动力学的控制。这篇综述文章概述了合金量子点和基于合金量子点的发光器件的载流子动力学的研究和理解的最新进展。特别强调俄歇复合与光学特性和光电特性之间的关系。该综述有望鼓励对合金量子点和相关设备的进一步研究，并激发新的合成努力，以生产稳定的合金量子点，并进一步改进对载流子动力学的控制。这篇综述文章概述了合金量子点和基于合金量子点的发光器件的载流子动力学的研究和理解的最新进展。特别强调俄歇复合与光学特性和光电特性之间的关系。该综述有望鼓励对合金量子点和相关设备的进一步研究，并激发新的合成努力，以生产稳定的合金量子点，并进一步改进对载流子动力学的控制。

更新日期：2021-10-27

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