On the afternoon of October 22, 2024, at 15:30, Researcher Zhu Jia from the National Center for Nanoscience, upon the invitation of Professor Huang Hui, delivered a lecture titled "Transport Mechanisms and Thermoelectric Performance Regulation of Organic Materials" at University of Chinese Academy of Sciences. The lecture was held in Classroom 214 of the Teaching Building 1.
About Zhu Jia: Zhu Jia is a researcher at the National Center for Nanoscience and Technology, a Ph.D. supervisor, and a member of the Organic Solids Professional Committee of the Chinese Chemical Society. From 2009 to 2021, he served as an associate professor at the College of Chemistry at Beijing Normal University, and in 2021, he joined the National Center for Nanoscience and Technology. His main research focuses on the electronic properties and processes of organic solid/semiconductor materials systems, as well as predicting the conductive and thermoelectric performance of molecular devices. He has established an integrated research model combining theoretical calculations, experimental validation, and device applications. In recent years, he has published over 80 research papers (SCI) as a corresponding author in top journals such as Nature Chemistry, Nature Communications, JACS, Angewandte Chemie, and Advanced Materials. He has also led and participated in several key projects, including the National Natural Science Foundation's Youth Fund, General Program, and the Ministry of Science and Technology's 973 Program.
The lecture began by introducing the concepts and key models of the field of organic solids, explaining the main research objects and characteristics of the organic solid discipline. Zhu Jia vividly illustrated the profound implications and practical significance of organic solids by quoting Academician Qian Renyuan's insights into organic solid. Organic solid science, one of the foundational fields in energy, information, and flexible materials, has significantly contributed to the advancement of modern technology through the development of advanced materials, green energy, electronic devices, and biomedical technologies. Hence, this discipline will be an essential theoretical and experimental foundation for the future development of new functional materials.
Zhu then presented first-principles calculations and experimental validations, applying Boltzmann transport theory and deformation potential theory to analyze various molecular structures and their aggregation states under non-doping conditions. He discussed the charge transport mechanism of Donor-Acceptor type charge-transfer complexes and changes in Seebeck values, predicting the thermoelectric conversion efficiency trends. The lecture revealed the interdependent relationships among key parameters in the thermoelectric conversion process and proposed theoretical insights for overcoming limitations in thermoelectric performance.
Lastly, Zhu Jia elaborated on the thermoelectric conversion mechanism and offered a vision for future thermoelectric technology, sparking great interest among the attending teachers and students, followed by a lively discussion.