报告人：Christian Müller 教授

主持人：唐正 特聘研究员

时间：2024年7月4日（周四）下午14:30

地点：复合材料协同创新中心大楼A212学术交流室

报告人简介：Christian Müller is a Professor in Polymer Science at the Department of Chemistry and Chemical Engineering of Chalmers University of Technology, Sweden. Prior to Chalmers, where he has been working since 2012, he completed postdoctoral stays at the Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) in Barcelona, Spain (2011-2012) and Linköping University, Sweden (2008-2010). He holds a Dr.Sc. in Materials Science from the Eidgenössische Technische Hochschule (ETH) Zürich, Switzerland (2004-2008) and a M.Sci. in Natural Sciences from Cambridge University, UK (2000-2004). He is a Wallenberg Scholar and was awarded an ERC Consolidator Grant in 2022. He was selected as a Future Research Leader by the Swedish Foundation for Strategic Research in 2016. His research interests include the physical chemistry of organic semiconductors, polymer blends and composites, and their use in the fields of wearable electronics and energy technology. He has co-authored more than 160 peer-reviewed papers and is a co-inventor of more than 20 patents or patent applications.

报告摘要：The nanostructure of solution-processed organic photovoltaic blends tends to evolve with time, which can have a detrimental effect on device performance. This talk will discuss the crystallization kinetics of polymeric and small-molecular organic semiconductors using time-temperature-transformation diagrams. The impact of mixing on the crystallization kinetics is explored. Blending of structurally similar perylenes, anthradithiophenes, fullerenes or non-fullerene acceptors is found to strongly suppress crystallization, instead resulting in the formation of highly stable glassy films. As a result, mixtures of up to eight structurally similar perylene derivatives display an unprecedented ability to form a molecular glass, and hexanary blends of five non-fullerene acceptors and a donor polymer yield photovoltaic devices with a thermally stable active layer.