Nature post!The research team of South China University of Technology has obtained important breakthroughs

On the occasion of the 70th anniversary of the establishment of the school and the 105 -year establishment of the school, a research results from Nature added a strong academic atmosphere. On September 7th, Professor Huang Fei, Academician Cao Yan, Academician Ma Yuguang, Professor Zhang Yuanzhu, Professor Guo Xugang, and Professor Pei Jian of Peking University in Southern University of Science and Technology, etc. The article of With Ultrahigh Conductivity "was published on Nature and was considered a major breakthrough in the field of conductive polymer research. Among them, Dr. Tang Haoran, the State Key Laboratory of South China University of Technology, is the first author, Professor Huang Fei is the author of the communications, and South China University of Technology is a communication unit.

The team of Professor Huang Fei proposed a method of combining oxidation polymerization and reducing doping. A pot method was simply prepared to prepare high -conductors N -type polymers -polyethyl (PBFDO) (PBFDO). The polymer has a record -recorded conductivity and has excellent air stability. It can achieve good solubility and solution processability through the strong interaction with the solvents without additional side chains or surface active agents. In addition, the team also proves that there are related charge transportation in the polymer and the characteristics of sootmor and electromagnetic shielding similar to metal -like puffed magnetic torque and electromagnetic shielding. This material shows excellent performance in the N -type organic electrical chemical transistor and thermoelectric electric machinery, which pave the way for the application of this N -type conductive polymer in organic electronics.

According to reports, conductive polymers have been widely used in solar batteries, sensors and some display technologies. Since the self -conductive poly acetylene has been reported, the conductivity of the conductive polymer can reach more than 1000 S CM⁻¹, which is comparable to some metal materials. However, most of the high -performance conductive polymers that have been reported at present show the transmission characteristics (P type) dominated by the empty acupoint, while the development of type N guide polymers is far behind, mainly manifested by low -doping efficiency and stability There are two aspects worse. Because the N -type doped reaction is usually a reaction based on a polymer (that is, the conjugate polymer seizes the electrons from the doped agent, so as to obtain the anion carrier) Sexual transfers can be achieved and the main chain of the coexistence polymer. For reducing agents with strong reduction, they are easily oxidized by oxygen in the air and loses doping activity, and usually do not have air stability. In addition, the doped N -type conductive polymers are also very easy to be captured by oxygen or water in the air, which causes the quenching of the carrier and the disappearance of the carrier characteristics.

In order to achieve high -performance N -type conductive polymers, efficient electronic transmission and high carrier concentration in the main chain need to be achieved at the same time. First of all, you need to design a rigid skeleton with the plane of the Communist Party, so that the carrier is easy to transmit on the polymer chain. However, the polymer with rigid co -skeleton does not have good solubility. It is necessary to introduce the method of side chain or surface active agent to ensure the solubility and solution processability of such polymers. In this way, this method is Additional insulation components will be introduced, which will adversely affect the conductivity. On the other hand, most N -type conductive polymers are low (usually about 10%), and need to further reduce the minimum of the polymers. Miscellaneous. And this requires a very complicated molecular structure, which makes it difficult for such N -type conductive polymers to be widely used.

Diagram of reaction mechanism of oxidation polymerization and in -situ N -type doped

Dr. Tang Haoran, Professor Huang Fei, and his team carefully designed the polymerization response and doping process to use the anti -oxidation and reduction characteristics of the cymbal oxidant. Under the condition of the oxidant in the oxidation agent, the oxidation reaction was used And dual -bepho -dione anterior dehydrogenation agglomeration; in addition, as the degree of aggregation increases, the LUMO level that generates a polymer will be significantly reduced, and the generated tetrahydramid hydrogen has a certain restoration, thereby oxidation During the agglomeration process, the reducing N -type dopic of the polymer is simultaneously realized. The process greatly improved the N -type doped efficiency of the polymer, and obtained the N -type conductive polymer with a conductivity of 2000 S CM⁻¹. In addition, the strong interaction between the co -pilot and the solvent with the power of the power makes the non -side chain PBFDO has good solubility. Based on its super high N -type conductivity and excellent environmental stability, PBFDO shows good application prospects in the application of thermoelectric devices and mechanical chemical crystal tube. It is expected to achieve its market -oriented application through further process improvement.

At present, a single high -purity benzene -amuarone, a single high -purity benzene -amuar, which is used to prepare high -conductivity N polymers.

The application of the prepared N -type guidance polymer in organic electronic devices

Article link: https://www.nature.com/articleS/s41586-022-05295-8

Attachment: Professor Huang Fei

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