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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.28: Poster
Monday, March 27, 2023, 18:00–20:00, P3
Exploring the kinetics of pseudo-bilayer architecture formation during sequential deposition via slot die coating — •Jinsheng Zhang1 and Peter Müller-Buschbaum1, 2 — 1TUM School of Natural Sciences, Chair for Functional Materials, Garching — 2MLZ, TUM, Garching
Recently, organic solar cells have received increasing attention due to obvious advantages such as flexibility and being lightweight. Among the different types of structures of the active layer, typically planar and bulk heterojunction geometries are used, which introduces intrinsic shortcomings. The newly developed pseudo-bilayer structure can perfectly combine their strengths and circumvent the drawbacks. Unfortunately, most of the pseudo-bilayer are still prepared by spin coating and rarely by printing methods such as slot die coating. Besides these studies mainly focus on selecting solvents, adding third components and studying the vertical morphology. The kinetics of forming the pseudo-bilayer architecture with slot-die coating are still unknown. Here we select the donor acceptor system PM6 and Y6 and the solvents CB and CF. First, PM6 is printed on the substrate and then Y6 is printed on top of PM6. During the deposition, in situ GIWAXS, in situ GISAXS, and in situ UV-vis absorption is carried out to study the formation of the pseudo-bilayer.