The blending and phase separation between the donor and acceptor in the organic photovoltaic cell will form a multi-scale phase separation morphology, which plays a decisive role in the performance of the organic thin film photovoltaic device. It is of great significance to effectively control the multi-scale morphology through the adjustment of the film-making process and the post-processing methods, combined with the physical and chemical properties of the receptor material itself. The research starts from the basic conditions of material crystallization and blending, from the two main lines of solution crystallization process control and cold crystallization process control, and carefully explores the relationship between the formation process of multi-scale topography and device performance, and adjusts to the receptor The crystallization behavior proposes a common method to guide the regulation of photovoltaic thin film morphology and the preparation of high-efficiency devices. Combining the characteristics of non-equilibrium multi-scale morphology, build device morphology and physical process models, and fully understand the photoelectric conversion process mechanism of organic thin-film photovoltaic cells. At the same time, the report will explain in more detail the topography characterization methods based on advanced light source technology and related knowledge of polymer physics.

Time

2021.09.29 12:00-13:30

Venue

ZIRC (multi-function room on the 4th floor of Siyuan Building)

Speaker

Liu Feng, Principle Investigator of School of Chemistry and Chemical Engineering