Compared to traditional electronic chips, optoelectronic chips have higher transmission speed and bandwidth. Among them, optical signals can be transmitted at the speed of light, which has huge advantages in high-speed communication and data transmission fields. Nanodevices with a single molecule as the photoelectric function center are expected to meet people's demand for device miniaturization and are the cornerstone of future molecular optoelectronic devices. Recently, Guo Xuefeng's research group and collaborators from the School of Chemistry and Molecular Engineering at Peking University insulated the molecular bridge and anchored it between graphene electrodes through covalent bonds, achieving high quantum yield phosphorescence/fluorescence radiation, and successfully applied it to logic operations and real-time communication. The related work, titled "Implementing Logic Operations and Real time Communication through Tunable Excited States in Single Molecule Optoelectronic Chips," was published online in the journal Chemistry. Guo Xuefeng introduced that so far, individual molecules still need to be improved in terms of device performance and stability, including the switching ratio of field-effect transistors, quantum yield of light-emitting diodes, and operating frequency of logic devices. Among them, the coupling between molecules and the outside world is a key parameter. Strong coupling may lead to hybridization between molecules and the outside world, while weak coupling weakens the modulation effect of external stimuli. Further development of molecular engineering, interface engineering, and electrode engineering is urgently needed. "Therefore, based on our previous series of research, our team has developed another multifunctional single molecule optoelectronic device, consisting of a platinum central molecular bridge encapsulated in cyclodextrin, a graphene electrode with nano gaps, and a silicon substrate. The two cyclodextrins on both sides weaken the coupling between molecules and the environment, thereby avoiding corresponding non radiative processes. The graphene electrode can form a strong covalent interface with molecules, further achieving multi molecule integration." Guo Xuefeng said. Yang Chen, the first author of the article and a postdoctoral fellow at Peking University, stated that further modulation of fluorescence and phosphorescence, as well as selective emission, can achieve comprehensive binary and ternary logical operations and real-time communication. Multi functional and efficient single-molecule optoelectronic devices connect molecular electronics with practical semiconductor applications, showcasing the disruptive advantages of single-molecule optoelectronic devices. This provides technical support for breaking down technological barriers and developing new principle devices, and is an important step for single-molecule devices to move from laboratory to industrial production. (Lai Xin She)
Edit：Luo yu Responsible editor：Wang xiao jing
Source：GMW.cn
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