Extreme Electron-Photon Interaction in Disordered Perovskites.

IF 14.3 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Science Pub Date : 2024-10-02 DOI:10.1002/advs.202405709

Sergey S Kharintsev, Elina I Battalova, Ivan A Matchenya, Albert G Nasibulin, Alexander A Marunchenko, Anatoly P Pushkarev

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Abstract

The interaction of light with solids can be dramatically enhanced owing to electron-photon momentum matching. This mechanism manifests when light scattering from nanometer-sized clusters including a specific case of self-assembled nanostructures that form a long-range translational order but local disorder (crystal-liquid duality). In this paper, a new strategy based on both cases for the light-matter-interaction enhancement in a direct bandgap semiconductor - lead halide perovskite CsPbBr₃ - by using electric pulse-driven structural disorder, is addressed. The disordered state allows the generation of confined photons, and the formation of an electronic continuum of static/dynamic defect states across the forbidden gap (Urbach bridge). Both mechanisms underlie photon-momentum-enabled electronic Raman scattering (ERS) and single-photon anti-Stokes photoluminescence (PL) under sub-band pump. PL/ERS blinking is discussed to be associated with thermal fluctuations of cross-linked [PbBr₆]^4- octahedra. Time-delayed synchronization of PL/ERS blinking causes enhanced spontaneous emission at room temperature. These findings indicate the role of photon momentum in enhanced light-matter interactions in disordered and nanostructured solids.

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无序过氧化物中的极端电子-光子相互作用。

由于电子-光子动量匹配，光与固体的相互作用会显著增强。这种机制表现在光从纳米尺寸的团簇（包括形成长程平移有序但局部无序（晶液二重性）的自组装纳米结构的特定情况）发生散射时。本文探讨了一种基于这两种情况的新策略，即利用电脉冲驱动的结构无序来增强直接带隙半导体--卤化铅过氧化物 CsPbBr3 中的光物质相互作用。无序状态允许产生约束光子，并形成跨越禁带间隙（乌尔巴赫桥）的静态/动态缺陷态电子连续体。这两种机制都是亚波段泵浦下光子动量电子拉曼散射（ERS）和单光子反斯托克斯光致发光（PL）的基础。PL/ERS 闪烁与交联 [PbBr6]4- 八面体的热波动有关。PL/ERS 闪烁的延时同步会导致室温下自发辐射的增强。这些发现表明了光子动量在无序和纳米结构固体中增强光-物质相互作用中的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

18.90

自引率

2.60%

发文量

1602

审稿时长

1.9 months

期刊介绍： Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.