Control and Enhancement of Single-Molecule Electroluminescence through Strong Light-Matter Coupling
Control and Enhancement of Single-Molecule Electroluminescence through Strong Light-Matter Coupling
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通过强光-物质耦合控制和增强单分子电致发光
DOI：
10.1021/acs.nanolett.2c05089
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发表时间：
2023
期刊：
影响因子：
10.8
通讯作者：
Ishizaki Akihito
中科院分区：
文献类型：
--
作者：
Miwa Kuniyuki;Sakamoto Souichi;Ishizaki Akihito
分子电子态在分子/电极界面上的能量位置是决定分子结输运和光电性能的关键因素。强的光-物质耦合提供了操纵这些因素的可能性，从而提高了这些结的效率和多功能性。在这里，我们研究电致发光从单分子结中的分子是强耦合的真空电磁场中的等离子体纳米腔。我们证明了提高电致发光效率，通过采用强的光-物质耦合结合单分子结的特性，选择性地控制最低能量激发态的形成。从极化激元态的能量位置和组成讨论了效率提高的机理。我们的研究结果表明，通过强的光-物质耦合操纵分子结中的光电转换的可能性，并有助于开发高效的分子光电器件提供设计原则。
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.