A Tunable Single‐Molecule Light‐Emitting Diode with Single‐Photon Precision. Issue 16 (9th March 2023)

• Record Type: Journal Article
• Authors: Yang, Chen; Guo, Yilin; Zhou, Shuyao; Liu, Zhirong; Liu, Zitong; Zhang, Deqing; Guo, Xuefeng
• Is Part Of: Advanced materials. Volume 35:Issue 16(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-09
• Subjects: electroluminescence -- Förster resonance energy transfer -- single‐molecule light‐emitting diodes -- single‐photon emission; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202209750
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: A robust single‐molecule light‐emitting diode (SM‐LED) with high color purity, linear polarization, and efficiency tunability is prepared by covalently integrating one fluorescent molecule into nanogapped graphene electrodes. Furthermore, single‐molecule Förster resonance energy transfer from the electroluminescent center to different accepters is achieved through rational molecular engineering, enabling construction of a multicolor SM‐LED. All these characterizations are accomplished in the photoelectrical integration system with high temporal/spatial/energy resolution, demonstrating the capability of the single‐photon emission of SM‐LEDs. The success in developing high‐performance SM‐LEDs inspires the development of the next generation of commercial display devices and promises a single‐photon emitter for use in quantum computation and quantum communication. Abstract : A functional electroluminescent molecular bridge is covalently integrated into nanogapped graphene electrodes to build a high‐performance single‐molecule light‐emitting diode with unprecedented levels of stability and reproducibility. Precise tunability of its emission efficiency, color purity, linear polarization, emitted photon number, and energy is achieved upon application of electric inputs, rational molecular engineering, and Förster resonance energy transfer, affording a new practical single‐photon emitter.