时间: 2025年4月17日（周四）下午16:00-17:30

Time: 16:00-17:30, Thursday, April 17, 2025

主持人: 西湖大学理学院PI 王盼 博士

Host: Dr. Pan Wang, PI of School of Science, Westlake University

地址：西湖大学云谷校区E10-201

Venue: E10-201, Yungu Campus, Westlake University

讲座语言：中文

Lecture Language: Chinese

何凤 教授

南方科技大学，化学系

Prof. Feng He,

Department of Chemistry, Southern University of Science and Technology, 

Shenzhen, 518055 (E-mail: hef@sustech.edu.cn)

主讲人/Speaker:

Dr. Feng He is a professor in the Department of Chemistry at Southern University of Science and Technology (SUSTech), where he leads a research group and is a recipient of the National Science Fund for Distinguished Young Scholars. He graduated from Jilin University with a bachelor's degree in 2002 and a Ph.D. in 2007. Subsequently, he conducted postdoctoral research at the University of Toronto in Canada, the University of Bristol in the UK, and the University of Chicago in the USA. Starting in 2012, he worked as a senior researcher at Nano-C, Inc. and Polyera Corp. in the USA. In 2014, he joined SUSTech to engage in teaching and research. In 2006, Dr. He was selected for the Lindau Nobel Laureate Meetings by the Sino-German Science Center. He was also a recipient of the National Special Expert (Youth) Program and was named the Young Scientist representing chlorine elements by the Chinese Chemical Society in 2019. He serves as an editorial board member for the journals Journal of Energy Chemistry, Next Energy, and Chinese Chemical Letters, and as an executive youth editor for the Chemical Journal of Chinese Universities. Dr. He's research group focuses on the regulation of non-covalent interactions of organic functional materials. They have advanced the application of these materials in organic photovoltaics and the 2D/3D self-assembly micro/nanomaterials. To date, he has published over 200 papers in leading international journals such as Joule, J. Am. Chem. Soc., Nat. Commun., Adv. Mater., Angew. Chem. Int. Edit. and CCS Chem., with over 10000 citations.

讲座摘要/Abstract:

The properties of organic functional materials are determined by both their chain structure and the intermolecular interactions. Many high-performance organic materials often exhibit synergistic weak interactions between molecules, which plays a crucial role in their good properties. Based on the basic concept of precisely controlling intermolecular interactions, we have developed a series of material systems with specific transport structures by controlling the arrangement and aggregation of organic optoelectronic molecules through the Cl∙∙∙S and Cl∙∙∙π interactions. In particular, we discovered a three-dimensional (3D) network structure in the model molecules with specific chlorine-mediated intermolecular interactions. This aggregated state provides more transport junctions and channels for intermolecular electron hopping, which will increase the exciton diffusion distance and effectively improve mobility. We also systematically studied the effects of chlorine substitution position, number, and isomerism on the formation of the 3D network structure, which could provide a better molecular design strategy to achieve improved device performance. With the exciton diffusion distance exceeding 40 nm, those materials open a window for the development of quasi-planar heterojunction (Q-PHJ) devices. Compared with bulk heterojunction (BHJ) devices, Q-PHJ devices have a thermodynamically stable donor-acceptor bilayer structure, which can greatly improve device stability for coming practical applications.

Reference

[1] H.J. Lai,^‡ Q.Q. Zhao,^‡ Z.Y. Chen,^‡ H. Chen,^‡ P.J. Chao, Y.L. Zhu, Y.W. Lang, N. Zhen, D.Z. Mo, Y.Z. Zhang, F. He* Joule 2020, 4: 688-700.

[2] H. Chen,^‡ T.X. Zhao,^‡ L. Li, P. Tan, H.J. Lai, Y.L. Zhu, X. Lai, L. Han, N. Zhen, L. Guo, F. He* Adv. Mater. 2021, 2102778.

[3] Lang Y.W., ^‡ H.J. Lai,^‡ Fu Y., Ma R.J., Fong P.W.K., Li H., Liu K., Yang X.C., Lu X.H., Yang, T.G.* Li G*, F. He* Adv. Mater. 2025, 2413270.

[4] Y.F. Ding^‡, W.A. Memon^‡, S.L. Xiong, S.K. Gong, M.P. Li, Z.H. Deng, H. Liu, Y.S. Liu, X.H. Chen, N. Zheng, F. He* Adv. Mater., 2025, 2501671.

[5] Y.F. Ding^‡, S.L. Xiong, W.A. Memon^‡, D. Zhang, Z. Wang, M.P. Li, Z.H. Deng, H. Li, M. Shao*, F. He* Angew. Chem. Int. Ed. 2025, 64, e202421430.

讲座联系人/Contact:

理学院，王旭，邮箱：wangxu@westlake.edu.cn

School of Science, Xu Wang, Email: wangxu@westlake.edu.cn