开启全光谱光辉：无铅金属卤化物的尺寸调节，实现卓越的光致发光性能

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-07 DOI:10.1021/acs.nanolett.4c03843

Xiaochen Wang, Tianxin Bai, Jinglu Sun, Jianyong Liu, Yan Su, Junsheng Chen

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引用次数: 0

摘要

具有可调结构的无铅金属卤化物已成为一类新型光电材料。金属卤化物多面体的排列决定了它们的结构尺寸，也是影响其光学特性的关键因素。为了研究这一点，我们合成了四种不同的掺杂锑（Sb）的铟（In）基金属卤化物，它们都具有零维（0D）电子结构，但在分子水平上表现出三维、二维、一维和 0D 结构维度。随着结构维度的降低，它们的自俘获激子（STE）发射出现了红移，峰值位置从 496 纳米升至 663 纳米。我们发现，随着结构维度的降低，[SbCl6]3- 八面体的畸变增加，导致 STE 能级降低和相应的红移，从而引起了红移。可调节的 STE 发射使这些金属卤化物有望用于防伪和白光 LED 应用。这些发现为调整无铅金属卤化物的 STE 发射提供了一种新策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Unlocking Full-Spectrum Brilliance: Dimensional Regulation in Lead-Free Metal Halides for Superior Photoluminescence

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Unlocking Full-Spectrum Brilliance: Dimensional Regulation in Lead-Free Metal Halides for Superior Photoluminescence

Lead-free metal halides with tunable structures have emerged as a new class of optoelectronic materials. The arrangement of metal halide polyhedra defines their structural dimensionality and serves as a key factor influencing their optical properties. To investigate this, we synthesized four different antimony (Sb)-doped indium (In)-based metal halides, all of which possess zero-dimensional (0D) electronic structures but exhibit 3D, 2D, 1D, and 0D structural dimensionality at the molecular level. With a decreasing of structural dimensionality, their self-trapped exciton (STE) emission shows a red shift with peak position from 496 to 663 nm. We revealed that the red shift is caused by increased distortion of [SbCl₆]^3– octahedra as the structural dimensionality decreases, leading to lowered energy levels of STE and a corresponding red shift. The tunable STE emission makes these metal halides promising for anticounterfeiting and white LED applications. These findings provide a new strategy for tuning STE emission in lead-free metal halides.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.