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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 28: Poster III

CPP 28.18: Poster

Wednesday, March 20, 2024, 11:30–13:30, Poster C

Study on morphology formation of sequential deposition printed organic solar cells — •Lixing Li¹ and Peter Müller-Buschbaum^{1, 2} — ¹TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — ²TUM, MLZ, 85748 Garching, Germany

Layer-by-layer (LbL) organic solar cells (OSCs) exhibit advantages over bulk heterojunction (BHJ) structures due to their interleaved network of donor/acceptor materials and a p-i-n device configuration. The emergence of small-molecule non-fullerene materials has extended the lifetime of excitons, thus making LbL OSCs gain more and more attention. However, most research on LbL OSCs focuses on spin-coating preparation, which may not be applicable for future large-scale production. Our study explores the fabrication of LbL OSCs using printing techniques. PM6 and several different non-fullerene materials are utilized as donors and acceptors, respectively. We use in situ GIWAXS, GISAXS, and UV-vis absorption spectroscopy to investigate morphology formation.

Keywords: Organic solar cells; Printed solar cells; Layer-by-layer; GIXS