Solution-Processed Near Unit Carbon Dots-Based Deep-Blue Electroluminescent Light-Emitting Diodes with External Quantum Efficiency over 10%

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-02-07 DOI:10.1021/acs.nanolett.4c06638

Boyang Wang, Jingkun Yu, Shurong Ding, Hongwei Wang, Yongsheng Hu, Siyu Lu

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Abstract

Deep-blue electroluminescent light-emitting diodes (ELEDs) are crucial for various applications, including solid-state lighting, high-density information storage, and vibrant displays. Currently, the development of conventional deep-blue ELEDs is predominantly based on multilayer evaporation structures. Despite significant technological progress, the fabrication of electroluminescent devices via low-cost solution processing has still not fully been realized. Given that, a novel approach for their development based on deep-blue emission carbon dots (CDs) has been proposed in this study. The as-prepared CDs exhibited a quantum yield close to 100% and a high exciton binding energy. The CDs-based ELEDs provided deep-blue emission at a wavelength of 450 nm, with CIE coordinates of (0.15, 0.07), closely approaching the standard color of the Rec. 2020 specification (0.131, 0.046). These results provide sufficient evidence that the devices fabricated in this work are one of the highest-performing CDs-based ELEDs developed so far, providing a quantum efficiency of over 10%.

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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.