Regensburg 2022 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Organic Electronics and Photovoltaics 1
CPP 1.2: Talk
Monday, September 5, 2022, 10:00–10:15, H38
Structure control during in situ printing of donor-acceptor blend films — Kerstin S. Wienhold1, Manuel A. Reus1, Dan Yang1, Baojun Lin2, Heng Zhao2, Wei Ma2, and •Peter Müller-Buschbaum1, 3 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049 China — 3Heinz Maier-Leibnitz Zentrum (MLZ), TU München, 85748 Garching, Germany
Among the next generation solar cells, in particular organic photovoltaics are gaining impact as a promising alternative to conventional silicon-based solar cells. However, despite big achievements in the last years, it remains an unresolved challenge to fabricate large-area organic solar cells without sacrificing efficiencies. The reason behind is that basic understanding is still very limited due to the complexity of the systems. Moreover, presently a substantial number of researchers use spin-coating for film fabrication, which is not compatible with the needs of a large scale production. Thus, using up-scalable fabrication methods such as printing are of immanent interest. In the present work, we use GISAXS and GIWAXS in situ during printing of donor:acceptor blends to gain fundamental understanding about the underlying film formation processes. Different examples of polymer donors and small molecule acceptors are presented and the resulting morphologies are correlated with solar cell device performance.