期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 62, 期 20, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202218568
关键词
Carbon; Electroluminescence; Electron Mobility; Light-Emitting Diodes; Quantum Dots
A study demonstrates the synthesis of hexagon-shaped carbon quantum dots (H-CQDs) with near-unity photoluminescence quantum yield (PLQY) and high electron mobility. The H-CQD-based light-emitting diodes achieved a high external quantum efficiency and a record maximum brightness. This study shows the potential of CQDs-based electroluminescent devices for display and lighting applications.
Carbon quantum dots (CQDs) feature bright and tunable photoluminescence, solution processability, and low toxicity, showing great potential in optoelectronics. However, the large-scale synthesis of CQDs with near-unity photoluminescence quantum yield (PLQY) has not been achieved so far. In this study, we perform radical-assisted synthesis of hexagon-shaped CQDs (H-CQDs) delivering near-unity PLQY (96 %). Experimental and theoretical analyses revealed that the large vertically oriented transition dipole moment of H-CQDs originating from high symmetry results in nearly 100 % PLQY. The H-CQDs also exhibited a high electron mobility of up to 0.07 cm(2) V-1 s(-1). These properties enable the H-CQD-based light-emitting diodes with a high external quantum efficiency of 4.6 % and a record maximum brightness of over 11 000 cd m(-2). This study represents a significant advance that CQDs-based electroluminescent device can be utilized for potential display and lighting applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据