时间：2025年5月30日（周五）10:00-11:30

Time: 10:00-11:30 am, Friday, May 30, 2025

地点：西湖大学云谷校区E10-306

Venue:E10-306, Yungu Campus

主持人: 西湖大学工学院 王睿 博士

Host: Dr. Rui Wang, Assistant Professor, Westlake University

语言：英文

Language: English

主讲嘉宾/Speaker：

Sang Il Seok

Distinguished Professor

Ulsan National Institute of Science and Technology (UNIST)

主讲人简介/Biography:

Sang Il Seok is a Distinguished Professor in the Department of Energy and Chemical Engineering at Ulsan National Institute of Science and Technology (UNIST), Korea. He received his Ph.D. in Inorganic Materials Engineering from Seoul National University and subsequently conducted postdoctoral research at Cornell University, USA, where he focused on defects and transport phenomena in Fe-Ti-O spinel structures. He further broadened his research experience as a visiting scholar at the University of Surrey, UK (2003), and at École Polytechnique Fédérale de Lausanne (EPFL), Switzerland (2006).

Prior to joining UNIST in 2015, Prof. Seok served as a principal investigator at the Korea Research Institute of Chemical Technology (KRICT) and concurrently held a full professorship in the Department of Energy Science at Sungkyunkwan University. His pioneering contributions to the development of perovskite solar cells have established him as a leader in the field. Since 2018, he has been consistently recognized as a Highly Cited Researcher in Materials Science by Clarivate Analytics.

Prof. Seok's outstanding achievements have been recognized with numerous prestigious honors, including the Korean Scientist Award from the Korean government (2017), the Kyung-Ahm Prize (2019), the Rank Prize (2022), and the Humboldt Research Award (2025) for his groundbreaking work in perovskite solar cell technology. His current research focuses on functional inorganic-organic hybrid materials and their application in devices, with a particular emphasis on high-efficiency, stable perovskite solar cells. His expertise and contributions have firmly established him as a highly respected figure in the fields of energy science and chemical engineering.

讲座摘要/Abstract:

Perovskite solar cells (PSCs) have advanced from a certified power-conversion efficiency of 3.8 % in 2009 to over 27 % today, driven by synergistic progress in thin-film chemistry, interface engineering, and device architecture. Converting these laboratory milestones into bankable, long-lived modules, however, requires a more nuanced understanding of the coupled chemical and physical processes that dictate film formation, charge transport, and degradation. This presentation traces our group’s decade-long efforts to elucidate and exploit those processes. We show that judicious incorporation of alkylammonium chlorides—particularly methylammonium chloride (MACl)—dramatically improves perovskite crystallinity and compositional homogeneity. Yet the underlying chemistry among formamidinium lead iodide (FAPbI3), MACl, and their reaction by-products has remained obscure. By disentangling these interactions, we reveal how the formation of methyl-formamidinium (MFA+) species influences phase stability, defect landscapes, and ultimately device performance. In the second part, I will highlight our development of low-temperature-processed inorganic electron-transport layers together with interface-passivation schemes that exploit the susceptibility of surface organic cations. These strategies synergistically enhance charge extraction, suppress interfacial recombination, and extend operational stability, charting an integrated pathway toward scalable, durable PSC modules.

讲座联系人/Contact:

工学院朱松梅

zhusongmei@westlake.edu.cn