电致发光
联轴节(管道)
光电子学
材料科学
激发态
等离子体子
分子
化学物理
纳米技术
化学
物理
原子物理学
图层(电子)
有机化学
冶金
作者
Kuniyuki Miwa,Souichi Sakamoto,Akihito Ishizaki
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-04-11
卷期号:23 (8): 3231-3238
标识
DOI:10.1021/acs.nanolett.2c05089
摘要
The energetic positions of molecular electronic states at molecule/electrode interfaces are crucial factors for determining the transport and optoelectronic properties of molecular junctions. Strong light–matter coupling offers a potential for manipulating these factors, enabling a boost in the efficiency and versatility of these junctions. Here, we investigate electroluminescence from single-molecule junctions in which the molecule is strongly coupled with the vacuum electromagnetic field in a plasmonic nanocavity. We demonstrate an improvement in the electroluminescence efficiency by employing the strong light–matter coupling in conjunction with the characteristic feature of single-molecule junctions to selectively control the formation of the lowest-energy excited state. The mechanism of efficiency improvement is discussed based on the energetic position and composition of the formed polaritonic states. Our findings indicate the possibility to manipulate optoelectronic conversion in molecular junctions by strong light–matter coupling and contribute to providing design principles for developing efficient molecular optoelectronic devices.
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