Enhanced Excitons Delocalization Toward High-Quality Emission Harvesting Unlocked by Pressure and Ligand Engineering.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-10-13 DOI:10.1021/acs.nanolett.5c04599

Feng Wang,Yufan Meng,Pengfei Lv,Zhiwei Ma,Guanjun Xiao,Bo Zou

引用次数: 0

Abstract

Quantum dots (QDs) are promising candidates for applications in electronics, optoelectronics, and bioelectronics. Currently, the development of precise surface modifications to regulate defect density and type is a research hotspot. Here, we report on high-quality green defect emission from CdS QDs with a considerable photoluminescence quantum yield of 34.9% generated through pressure and ligand engineering. Upon an increase in the external pressure applied on CdS QDs, a remarkable piezochromism phenomenon from orange to cyan was observed. Note that after complete release of pressure, an unconventional bright green emission can be stabilized. The permanent modulation of the interaction between CdS QDs and the ligand through pressure treatment intensified the passivation effect and facilitated exciton delocalization to the QD surface, ultimately leading to high-quality emission harvesting. This work contributes to the precise construction of ligand engineering for future QD-based technologies.

查看原文本刊更多论文

通过压力和配体工程实现高质量发射收获的增强激子离域。

量子点在电子学、光电子学和生物电子学等领域具有广阔的应用前景。目前，开发精确的表面改性技术来调节缺陷密度和类型是一个研究热点。在这里，我们报道了通过压力和配体工程从CdS量子点产生的高质量绿色缺陷发射，其光致发光量子产率达到了34.9%。当施加在CdS量子点上的外部压力增加时，观察到一个显着的从橙色到青色的压变色现象。请注意，在完全释放压力后，一种非常规的亮绿色排放物可以稳定下来。通过压力处理永久调制CdS量子点与配体之间的相互作用，增强了钝化效应，促进了激子离域到量子点表面，最终实现了高质量的发射收获。这项工作有助于未来基于量子点技术的配体工程的精确构建。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.