Professor Pei Jian's Lecture on "Development of Novel Organic Semiconductor Molecular Framework Systems"

          Professor Pei Jian pointed out in his report that organic electronic materials, especially organic semiconductor materials, have a wide range of applications in life and industry. In order to improve the performance of organic semiconductor devices, scientists use molecular doping to control the carrier concentration of organic semiconductor devices. and the Fermi level, filling its carrier traps and improving the electrical conductivity of the material, thereby achieving a significant improvement in the performance of organic semiconductor materials. To accomplish molecular doping of organic semiconductor devices, the properties of molecular dopants are particularly critical. A variety of new n-type dopants have been designed in view of the two problems existing in the existing n-type dopants: the counter-ion becomes an impurity that hinders charge transport and the phase separation of the dopant and the semiconductor is caused by poor miscibility.

     Prof. Pei Jian introduced the research progress of his research team in designing n-type dopants through organic negative hydrogen compounds, from doping mechanism, negative hydrogen mechanism, molecular design, electron-deficient framework system, synthesis route, performance characterization and industrialization. Excellent results have been achieved in applications and other aspects, and thermally excited doping, highly miscible TAM and N-heterocyclic carbene dopants have been introduced. At the end of the report, Professor Pei Jian also briefly introduced a variety of new n-type dopants, and predicted the future development trend of this field.

      In the Q&A session of the report, the teachers and students of the National Academy of Sciences and Professor Pei Jian conducted in-depth exchanges and discussions on academic and scientific research issues such as doping mechanism characterization, design principles of n-type dopants, and development of carbene dopants. The atmosphere was warm and the lecture ended successfully with warm applause.

      Pei Jian, born in December 1967. Professor at the School of Chemistry and Molecular Engineering, Peking University. He received his Ph.D. from Peking University in 1995. Mainly engaged in the synthesis, characterization and device research of organic polymer semiconductor materials. Mainly include: design and synthesis of a series of high-performance star material systems, controllable modulation of the self-assembly behavior and microstructure of materials, and improvement of existing processes for device processing, and ultimately achieve high-efficiency and industrializable devices. So far, he has published more than 280 SCI-indexed papers in international academic journals, among which more than 50 papers have been published in international authoritative journals such as Nature sub-journal and JACS. In the international academic exchange activities, he has been invited to report more than 30 times in international conferences such as the annual meeting of the American Chemical Society, the annual meeting of the International Materials Research Association and the International Synthetic Metal Conference, and has served as the chairman of international conferences or branches for many times. He has applied for 9 national invention patents, 6 of which have been authorized, 3 international patents, 1 Taiwan patent, 2 US patents authorized in cooperation with the company, and 5 books. In 2004, he won the Outstanding Youth Fund of the National Natural Science Foundation of China; in 2010, he won the 5th Chinese Chemical Society-BASF Company Youth Knowledge Innovation Award; in 2011, he won the 7th Beijing Higher Education Teacher Award; in 2012, he was hired as an educator He is a Distinguished Professor of the Ministry of Education; in 2013, he won the first prize of the Natural Science Award of the Ministry of Education (the first person to complete it), and the first prize of the 7th Beijing Higher Education Teaching Achievement Award; in 2014, he won the 3rd Chinese Chemical Society-Evonik Chemical Innovation In 2016, he won the second prize of Beijing Science and Technology Award (the first person to complete it). In 2018, he won the second prize of the National Teaching Achievement Award. Invited to serve as the International Advisory Board of the most important conference in the field of polymer semiconductors - the International Conference on Synthetic Metals, the International Advisory Board of the international academic journal Chem. Asian J., and the Editorial Board Chair of Asian J. Org. Chem. In 2020, he was awarded the National Teaching Teacher.