铯铅卤化钙钛矿中的表面激子极化子

IF 7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Chemistry of Materials Pub Date : 2025-03-07 DOI:10.1021/acs.chemmater.4c03262

Jason Hao, Jeffrey Owrutsky, Daniel C. Ratchford, Blake Simpkins, Alexander L. Efros

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引用次数: 0

摘要

在这篇文章中，我们发展了一个描述表面激子极化（sep）的理论，该理论解释了与激子动量相关的介电常数的空间色散。由于纵向激子和横向激子在频率间隔（ωLT）中光和体激子之间的强耦合，形成了部分光部分物质的SEP。通过麦克斯韦方程和托马斯-霍普菲尔德方程的联合解，发现了SEP的色散。解析理论描述了任何块激子/真空界面上的sepp，并提供了其完全色散，如果知道了激子有效质量M和高频介电常数κ∞。所提出的理论与该问题的唯一数值模拟非常一致，该模型是在ZnO/真空界面上对SEPs进行的。计算表明介电常数的空间色散导致类光子准粒子的展宽相当小，并建议使用sep进行远程相干转移。该理论用于描述SEP在CsPbCl3和CsPbBr3钙钛矿中的分散。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Surface Exciton Polariton in Cesium Lead Halide Perovskites

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Surface Exciton Polariton in Cesium Lead Halide Perovskites

In this article, we developed a theory describing surface exciton polaritons (SEPs) that accounts for the spatial dispersion of the dielectric constant connected with exciton momentum. Due to strong coupling between light and bulk excitons in the frequency separation, ℏω_LT, between the longitudinal and transverse excitons, the SEP is formed and behaves as partially light and partially matter. The dispersion of the SEP was found through a combined solution of Maxwell’s and Thomas-Hopfield’s equations. The analytical theory describes SEPs at any bulk exciton/vacuum interface and provides its complete dispersion if one knows ℏω_LT, the exciton effective mass, M, and the high-frequency dielectric constant, κ_∞. The presented theory is in excellent agreement with the only numerical modeling of this problem, which was conducted for SEPs at a ZnO/vacuum interface. Calculations show the spatial dispersion of the dielectric constant leads to rather small broadening of the photon-like quasi-particle and suggest using SEPs for long-range coherence transfer. The theory was used to describe SEP dispersion in CsPbCl₃ and CsPbBr₃ perovskites.

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.