二维单层双分子复合载流子激子湮灭的证据

IF 3.2 3区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry C Pub Date : 2025-09-04 DOI:10.1021/acs.jpcc.5c04223

Jędrzej Szmytkowski*,

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引用次数: 0

摘要

在这项工作中，我们分析了电子和空穴上的激子湮灭，它们在双分子重组之前形成朗万对。这种物理机制以前没有考虑过二维（2D）材料。基于包含新导出的二维结构朗之万复合系数的动力学模型，我们能够解释MoSe2， WSe2， MoS2和WS2单层的光致发光量子产率的实验结果。证明了激子与载流子之间的相互作用在二维单层中起着重要的作用。

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Evidence of Exciton Annihilation on Bimolecularly Recombining Charge Carriers in Two-Dimensional Monolayers

In this work, we analyze the exciton annihilation on electrons and holes, which form the Langevin pairs before a bimolecular recombination. This physical mechanism has not been considered before for two-dimensional (2D) materials. Based on the kinetic model, which includes a newly derived the Langevin recombination coefficient for 2D structures, we are able to explain experimental results of the quantum yield of photoluminescence obtained for MoSe₂, WSe₂, MoS₂ and WS₂ monolayers. It proves that the interaction between excitons and charge carriers can play an important role in 2D monolayers.

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来源期刊

The Journal of Physical Chemistry C 化学-材料科学：综合

CiteScore

6.50

自引率

8.10%

发文量

2047

审稿时长

1.8 months

期刊介绍： The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.