On the morning of September 13, 2024, Professor Chen Huipeng from Fuzhou University was invited by Professor Huang Hui to give a lecture on the theme of "Display-oriented Neuromorphic Devices and Systems" at the University of Chinese Academy of Sciences, which was held in 214, Teaching Building 1.

This lecture first introduces the technical support of high-quality display images, high-frequency display drivers, and massive parallel computing in the future that will inevitably be inseparable from the needs of more realistic display experience, more frequent human-computer interaction, and larger data processing. Traditional display technology is facing the great challenges of high power consumption and low efficiency, and neuromorphic technology with the characteristics of integrated storage and computing can well solve these difficulties, so neuromorphic technology is an effective strategy to realize future intelligent display.

Then, the lecture introduced the specific work from four aspects: sensory memory and computing processing at the neuromorphic chip end, structural design of neuromorphic devices, neuromorphic light-emitting devices and neuromorphic display circuits, and pointed out that it is necessary to use the "top-down" idea to design neuromorphic devices and achieve simulation at the molecular level.

Finally, the lecture gave an outlook on neuromorphic display technology, and believed that the first stage of neuromorphic display development is to break the physical boundaries of storage, computing and display modules. The second stage is to integrate the functions of storage, calculation, and display on a single pixel.

At the end of the lecture, Mr. Chen discussed the problems of neuromorphic display at the device level, material level and mechanism level, and the lecture aroused heated discussions between teachers and students.

Chen Huipeng graduated from the University of Science and Technology of China in 2004 with a double bachelor's degree in applied physics and electronic information engineering. He graduated from Tufts University in United States in 2009 with a Ph.D. in physics. He is currently a professor and doctoral supervisor of Fuzhou University. He is a distinguished professor of Fujian Minjiang Scholars and a winner of the Fujian Outstanding Youth Fund. He has been engaged in the research of semiconductor optoelectronic materials and devices preparation and application for a long time. In the past 5 years, he has published more than 100 SCI papers in related high-level journals at home and abroad as the corresponding author in Nature Communications (7), Advanced Materials (5), IEEE EDL (15) and other related high-level journals at home and abroad. He has presided over the National Natural Science Foundation of China regional joint key projects, national key research and development projects, and general projects of the National Natural Science Foundation of China.

  On the morning of June 12, 2024, Wang Yibo, a researcher from the Institute of Electrical Engineering of the Chinese Academy of Sciences, was invited by Professor Huang Hui to give a lecture on the theme of "Green Power Technology Innovation and Global Cooperation in Response to Climate Change" at the University of the Chinese Academy of Sciences. The lecture was held in Room 215 of the first Teaching Building.

      The burning of fossil fuels emits a large amount of CO₂, leading to global warming. On December 12, 2015, the Paris Agreement was adopted at the 21st United Nations Climate Change Conference (Paris Climate Conference), aiming to limit the global average temperature rise to less than 2 degrees Celsius compared with the pre-industrial period, and strive to limit the temperature rise to less than 1.5 degrees Celsius. In recent years, it has received widespread attention around the world.

      In the lecture, Wang Yibo briefly introduced several major sources of CO₂ emissions, of which the energy sector accounts for about 85%, so to achieve the established goals of the Paris Agreement, it is necessary to achieve energy transformation and reduce the burning of fossil fuels. In 2015, the international community put forward the "Innovation Mission" initiative, and China was one of the first countries to launch the initiative. Wang Yibo clearly introduced the goals of the first phase (2015-2020) of the "Innovation Mission" : to double the government's scientific research investment in the field of clean energy, build a high-level international platform, and promote the development of clean energy innovation; The second phase (2021-2030) of the sixth Ministerial Conference on "Innovation Mission" issued the MI2.0 Innovation Declaration and two major innovation cooperation mechanisms "mission mechanism" and "innovation platform". After that, Wang Yibo spoke about three major challenges: Challenge 1: economical and reliable renewable energy generation technology; Challenge 2: Power system flexibility and market design; Challenge three: Power system integration, data and digitization. Then, researcher Wang Yibo introduced the next step of development ideas, in-depth international cooperation with developed countries, and the construction of a multilateral cooperation mechanism and platform of "self-oriented, for our use". At last, researcher Wang Yibo conducted exchanges and discussions with teachers and students on site, and received warm responses from teachers and students on site.

      Dr. Wang Yibo is currently a researcher and doctoral supervisor at the Institute of Electrical Engineering, Chinese Academy of Sciences. He is also the leader of the "14th Five-Year Plan" renewable energy technology key special expert group of the Ministry of Science and Technology, the expert group of the smart grid Science and Technology Innovation 2030 major project of the Ministry of Science and Technology, and the secretary-general of the photoelectric special Committee of the Chinese Renewable Energy Society. Commissioned by the Ministry of Science and Technology in 2016, he established the Chinese Secretariat of "Innovation Mission" and served as the deputy director of the mission of "Green Power Future". In the past five years, he has presided over or participated in the preparation of more than 10 major consulting reports and held dozens of international conferences.

     On the morning of May 23, 2024, Professor Yu Donghong from Aalborg University in Denmark came to the University of Chinese Academy of Sciences at the invitation of Professor Huang Hui to give a lecture on the theme of "'Little' Denmark, 'Big' Batteries, 'New' Molecules". The lecture Located in Teaching One 115.

This lecture first introduces the scale-up synthesis experiment based on donor-acceptor polymer materials with reasonable molecular orbital energy levels, making it a continuous flow method with high molecular weight and constant mass, which can significantly increase the reaction rate and yield. The rate reaches the order of hundreds of grams per day.

Then, for traditional polyphenylene materials, we continued to use the fullerene acceptor system and applied roll-to-roll large-area rapid printing to create a large-area organic photovoltaic module composed of 40,000 single-junction cells, and at the same time generated electricity. Perform DC-AC conversion, simulate the grid input and output of energy, and ultimately reveal the possibility of organic photovoltaic power generation and transmission in the power grid in the future.

Finally, it will be explained that the traditional main chain skeleton conjugated donor/acceptor polymer materials cannot achieve ideal nanometer-sized self-assembly due to limitations of polymerization methods, which seriously affects the charge (carrier) separation and subsequent follow-up in photoexcitons transmission.

At the end of the lecture, Teacher Yu and everyone discussed the structural design and possible synthesis of new concepts of conjugated structure polymers. The lecture aroused heated discussion among teachers and classmates.

Professor Yu Donghong worked at the State Key Laboratory of Polymer Chemistry and Physics at Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, the National Institute of Materials and Chemistry, Institute of Industrial Technology, Japan, and the Mechanics Department at Aalborg University, Denmark, from 1997 to 2006. He serves as an assistant professor, special research fellow, research assistant professor, and assistant professor in the Department of Engineering and the Department of Chemistry and Biological Sciences. From 2006 to the present, he is a tenured associate professor in the Department of Chemistry and Biological Sciences at Aalborg University, Denmark. Research areas include organic solar cell materials, polymer light-emitting diodes, molecularly imprinted polymers (molecular recognition, biosensing) and inorganic-organic nanohybrid biomaterials. It has successively undertaken funds from the Danish Ministry of Technology and Innovation, the Danish National Natural Science Foundation and the Danish National Strategic Research Fund, with a total scientific research funding of more than 20 million Danish kroner. He published 152 academic papers, which were cited 4030 times by him. In 2009, he won the Best Teacher Award from Aalborg University, Denmark.

On the morning of May 20, 2024, Professor Huang Xiaoyu, a researcher from Shanghai Institute of Organic Chemistry, was invited by Professor Huang Hui to give a lecture on "Polymer molecular Brush and its Functional Materials" at the University of Chinese Academy of Sciences in Classroom 115 of the first Teaching Building.

Polymer molecular brushes have been widely used in fingerprint development, catalysis, drug delivery, antifouling coatings and lithium-ion batteries, etc., and have attracted wide attention in recent years. 

In the lecture, Professor Huang Xiaoyu clearly introduced the definition, difference, structural characteristics and application of one-dimensional, two-dimensional and three-dimensional polymer molecular brushes. The first one-dimensional polymer molecular brush is also known as grafted copolymer, which refers to the copolymer formed by dense grafting of the polymer side chain to the linear polymer chain. The compact structure of one-dimensional polymer molecular brushes produces some unique properties, such as wormlike conformation, compact molecular size, and significant end-chain effects. Two-dimensional and three-dimensional polymer molecular brushes refer to polymer composite systems formed by polymer chains densely linked on the surface of various organic or inorganic substrates. The polymer composite system not only retains the properties of the matrix, but also the introduction of polymer chains gives the composite system special properties, such as corrosion resistance, colloidal stability, anti-adhesion, stimulation response, lubrication and friction. The applications of one-dimensional, two-dimensional and three-dimensional polymer molecular brush materials in fingerprint development, catalysis, drug delivery, antifouling coating and lithium-ion battery are also introduced. Finally, Professor Huang Xiaoyu exchanged and discussed with the on-site teachers and students, and got a warm response from the on-site teachers and students.

Huang Xiaoyu is a researcher and doctoral supervisor of Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. He graduated from the junior Class of Nanjing University in 1993 and from the Department of Polymer Science of Fudan University in 1998. From 1998 to 2001, he conducted postdoctoral research in the University of Toronto, Canada and the University of Akron, USA. In 2001, he was selected into the "100 Talents Program" of the Chinese Academy of Sciences and was employed as a researcher and doctoral supervisor of Shanghai Institute of Organic Chemistry of the Chinese Academy of Sciences. In 2018, it was approved as the National Science Fund for Outstanding Young People. He is mainly engaged in the research of organic polymer functional materials. He has presided over a number of national "863" projects (2), "973" projects and National Natural Science Foundation (11) and other national projects. Since 2017, more than 80 SCI papers have been published in international academic journals, and 11 Chinese invention patents have been authorized. In 2017 and 2022, he won the first prize of Shanghai Natural Science Award twice as the first complete person. In 2021, he won the Zhu Liyuehua Excellent Teacher Award of the Chinese Academy of Sciences.

At 10:30 on May 15, 2024, Professor Zhang Yuetao from Jilin University, at the invitation of Professor Huang Hui, came to the University of Chinese Academy of Sciences to give a lecture on the theme of "Blocking Lewis acid-base pairs to achieve accurate synthesis of polymers". The lecture was held in Room 215 on the first floor of the classroom.

Precise synthesis of polymers can control the structure and properties of polymers, which has been the focus of research in the field of polymer synthesis. The hindered Lewis acid-base pair (FLP) system has both Lewis acidity and base which are not quenched by each other. The synergistic effect of Lewis acid-base can not only achieve active polymerization, but also overcome the problems existing in traditional active polymerization methods.

In this report, a new FLP system was designed and synthesized, which improved the initiation efficiency of polymerization and inhibited the side reaction of chain bite, and for the first time realized the activity-controlled polymerization of various polar vinyl monomers catalyzed by FLP. By using FLP system with high polymerization activity and good stability, the rapid synthesis of ultra-high molecular weight polymers at room temperature and a large number of 63-block sequence controllable polymers have been achieved. The topological structure of the polymer is controlled by the flexible tunable structure of the system. The three-block thermoplastic elastomer is synthesized in one step by the topological polymerization from the middle to the two sides using the double-initiated phosphine base system. A new method for synthesis of cyclic polymers was developed using bimolecular synergistic effect of FLP system with three functions. The hindered Lewis acid-base active polymerization system has high activity, good stability and flexible structure adjustability, which is a new kind of active polymerization system with great development potential. Professor Zhang Yuetao exchanged and discussed with the on-site teachers and students, and got a warm response from the on-site teachers and students.

Zhang Yuetao, male, received his doctorate of Science in Organic Chemistry from the School of Chemistry, Jilin University in 2004 and worked there in the same year. In 2006, he worked as a postdoctoral researcher in Eugene Y-X. Chen's research group at Colorado State University. In 2009, he worked as a research scientist II in the Department of Chemistry, Colorado State University. In 2013, he was selected into the fourth batch of national "Overseas High-level Talent Introduction Program Youth Project", and was employed as a professor and doctoral supervisor of Jilin University. In 2014, he was awarded the "Outstanding Youth Science Fund" by the National Natural Science Foundation of China. In 2022, he won the "National Science Fund for Outstanding Young People". He is currently engaged in the research of polymer synthetic chemistry, focusing on the precise synthesis of polymers catalyzed by Lewis acid-base pairs; Catalytic synthesis of polymers based on renewable resources (catalytic synthesis of sustainable polymers); Research on the degradation of non-food biomass into high value-added chemicals or biomass energy. A series of important research results have been obtained. Now available in Nature Chemistry, J. Am. Chem. Soc., Angew. Chem. Int. Ed., Nature Communications, CCS Chemistry, Journals such as Chemical Science have published more than 80 SCI indexed papers and obtained 17 Chinese invention patents. He is currently on the Young editorial board of the journal Science Bulletin.

      At 14:00 on May 13, 2024, Professor Fu Hongbing from Capital Normal University came to the University of Chinese Academy of Sciences at the invitation of Professor Huang Hui to give a lecture on the theme of "Exploration of Organic Electric Pump Lasers". The lecture was held in Classroom 108 on the first floor.

      All-solid-state lasers have the characteristics of small size, good monochromaticity, strong directionality, and high brightness, and have received great attention in recent years. Especially today, when the development of science and technology requires the miniaturization and multi-functionality of devices, organic micro-nano laser materials have the advantages of low price, the ability to control the full spectrum of laser wavelengths through molecular tailoring, and the ability to be integrated on a flexible substrate on a large scale. Huge application potential.

      Professor Fu started from four aspects: organic micro-nano single crystal microcavity effect, highly conductive laser gain materials, organic TADF and phosphorescent gain materials, and organic laser excitons. Based on the key scientific and technological issues of laser devices, from the source of material design Starting from the beginning, through precise and controllable self-assembly technology, breakthroughs in the two core technologies of laser gain medium and laser resonant cavity were achieved.

      At present, high-performance laser devices have achieved full spectrum coverage of wavelengths from the ultraviolet region to the near-infrared region; through laser micromachining technology and patterned assembly technology, the design of organic, organic/inorganic hybrid micro-nanocrystalline laser arrays has been achieved ; Realize the design and application of micro-nano photonic devices based on organic micro-nano crystal laser materials. Aiming at the important scientific frontier of organic electrical pump laser, we try to solve its key scientific and technological problems from the perspective of new materials, new technologies and new principles.

      During the lecture, the teacher and classmates actively discussed the content of the report. The report aroused widespread interest among teachers and students.

      Fu Hongbing, Department of Chemistry, Capital Normal University, professor, doctoral tutor and student tutor, director of Beijing Key Laboratory of Optical Functional Materials and Devices. In 2006, he was selected into the "Hundred Talents Program" of the Institute of Chemistry, Chinese Academy of Sciences. In 2009, he was funded by the National Science Fund for Distinguished Young Scholars. In 2015, he was awarded the Yangtze River Distinguished Professorship of the Ministry of Education. In 2021, he was awarded the title of Beijing Scholar. He was awarded the title of third-place finisher twice in 2004 and 2014. Won the second prize of National Natural Science Award. A total of more than 230 articles have been published in the field of organic micro-nano optical functional materials and devices, and the articles have been cited more than 15,000 times. H-index: 63

At 14:00 on March 12, 2024, Professor Gao Feng from Linkoping University, Sweden was invited by Professor Huang Hui to give a lecture on "Minimizing voltage loss of organic Solar Cells" in the University of Chinese Academy of Sciences. The lecture was held in Room 214 on the first floor of the classroom.

The power conversion efficiency of organic solar cells (OSCs) has now reached a high value of close to 20%. Recent advances in organic solar cells based on non-fullerene receptors (NFAs) reduce the voltage loss of non-radiation. In contrast to the energy gap law dependence observed in conventional "donor: Fullerene acceptor" blends, in the most advanced "Donor: non-fullerene acceptor" organic solar cells, the non-radiating voltage loss is not correlated with the energy of the charge transfer electronic states at the "donor: acceptor" interface.

By combining temperature-dependent electroluminescence experiments and dynamic vibration simulations, Professor Gao's team provided a uniform description of non-radiative voltage losses in fullerene-based and non-fullerene-based devices. Second, the team emphasizes that the photoluminescence yield of the original material determines the lower limit of non-radiative voltage loss. The team also demonstrated that non-radiative voltage losses can be obtained without sacrificing charge generation efficiency (e.g. <0.2 V) reduction. The team further extended their understanding to ternary organic solar cells, providing reasonable material design rules for the third element of the efficient triplet. Professor Gao Feng conducted exchanges and discussions with the on-site teachers and students, and got a warm response from the on-site teachers and students.

Gao Feng, Professor, Linkoping University, Sweden. He received his bachelor's and Master's degrees from the Department of Physics of Nanjing University in 2004 and 2007, and his doctorate degree from Cavendish Laboratory of Cambridge University in 2011. He then joined Linkoping University in Sweden as a Marie Curie Post-Doctoral Fellow (2013), Assistant Professor (2015), Associate Professor (2017) and Professor (2020). Currently visiting Westlake University. He is deputy editor of Science in China: Materials and deputy editor of FexMat. Professor Gao Feng's research interests are in solution-processable optoelectronic devices and their mechanisms, mainly based on organic and perovskite semiconductor materials. Related work has been published as corresponding author in Science, Nature, Nature Materials, Nature Photonics, NatureEnergy, Nature Electronics and other journals. Supported by a number of talent programs in Sweden and the European Union, including Future Research Leader of the Swedish Foundation for Strategic Research, Wallenberg Academy Fellow funded by the Wallenberg Foundation in Sweden, ERC Grants from the European Research Council (Starting Grant 2016, Consolidator Grant 2021). 2020-2025 As Chief Scientist to chair key frontier science projects of the Wallenberg Foundation in Sweden. In 2020, he was awarded the Tage Erlander Prize by the Royal Swedish Academy of Sciences for his research on the mechanisms of solar cells and light-emitting diodes.

      At 15:30 on December 15, 2023, Professor Shi Feng from Beijing University of Chemical Technology was invited by Professor Huang Hui to give a lecture on "Macroscopic supramolecular Assembly and its Application" in the University of Chinese Academy of Sciences. The lecture was held in Room 305 on the first floor of the teaching Hall.

      Macroscopic supramolecular assembly refers to the process of constructing supramolecular materials by introducing supramolecular recognition groups through surface chemical modification on the construction primitive surface of more than 10 microns, and then assembling supramolecular materials by interface. It is a new research direction of supramolecular chemistry and provides a new idea for the preparation of bulk phase supramolecular materials.

      Professor Shi Feng first introduced the research of macroscopic supramolecular assembly, which can develop new functional materials by drawing on natural supramolecular materials. Moreover, the research of macroscopic supramolecular assembly can provide an ideal model system to explain the interfacial interaction widely existing in the field of materials science, and help to understand the relevant interfacial mechanism of action. Then, focusing on the problem of how to achieve efficient and accurate macroscopic supramolecular assembly, the design principle of high compliant surface is introduced from the perspective of the influence of interface deformation ability on assembly behavior. In the macroscopic supramolecular assembly, the collision and assembly of building elements depend on strong external forces such as vibration and rotation, resulting in poor matching degree and low order degree of the final assembly. Therefore, the team developed two strategies. For the system where the dynamic process of the imprecise structure is dominant, the difference in thermodynamic stability between the imprecise structure and the precise structure was utilized to develop a self-correcting strategy. Obtain accurate assemblies; For the system which can control the assembly dynamics and realize the precise structural dynamics process, the assembly of the system in the near thermodynamic equilibrium state is realized by constructing the spontaneous motion of the primitive, and the ordered structure is obtained directly. Finally, the three-dimensional ordered structure of heterogeneous materials is constructed by macroscopic supramolecular assembly, which solves the problem of efficient composite of heterogeneous materials in three-dimensional space, and expands the application range of supramolecular assembly. Professor Shi Feng conducted exchanges and discussions with the on-site teachers and students, and got a warm response from the on-site teachers and students.

      Shi Feng, professor, PhD supervisor, Beijing University of Chemical Technology. His research interests focus on macroscopic supramolecular assembly, focusing on the interpretation of interfacial interactions in the field of materials, and developing new ways to prepare bulk phase supramolecular materials. Currently in Adv. Mater, Angew.chem.in.ed., Nat.Commun. He has published more than 100 papers in other journals, granted 6 patents, and cited more than 5,000 times in SCI. Supported by the National Science Foundation for Outstanding Young People, the National Natural Science Foundation for Outstanding Young People, Beijing Jieqing, and the Huo Yingdong Foundation of the Ministry of Education. Selected as the "Ten thousand People Plan" scientific and technological innovation leading talents, the Ministry of Education's first Young Yangtze River Scholars, the Ministry of Education's New century talents, Beijing New Star Program and so on. He is the chief editor of Supramolecular Materials, a new journal of Science Press /Elsevier, the editorial board member of Cell Reports Physicascience, and the Executive editor of Chemical Journal of Colleges and Universities. He is a member of supramolecular Chemistry Committee and bionic Materials Chemistry Committee of Chinese Chemical Society.