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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Organic Electronics and Photovoltaics II
CPP 31.9: Vortrag
Mittwoch, 20. März 2024, 17:15–17:30, H 0110
Enhanced air stability with solid additive EH-P in PBDB-TF-T1:BTP-4F-12 solar cells — •Zerui Li1, Sergei Vagin2, Kun Sun1, Xiongzhuo Jiang1, Renjun Guo1, Matthias Schwartzkopf3, Stephan V. Roth3,4, Bernhard Rieger2, and Peter Müller- Buschbaum1,5 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2TUM School of Natural Sciences, Wacker Chair of Macromolecular Chemistry, 85748 Garching, Germany — 3DESY, 22607 Hamburg, Germany — 4KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, Sweden — 5MLZ, TUM, 85748 Garching, Germany
Additive plays an important role in organic solar cells. Traditional additives are most liquid, such as DIO, CN, DPE. Nowadays solid additives have called more research interest due to their various advantages in morphology-directing abilities, post treatment, enhanced device performance and stability. We explored an effective solid additive EH-P in green-solvent based organic solar cells (PBDB-TF-T1: BTP-4F-12). Greatly increased device performance and stability were achieved with EH-P doping. In-situ GIWAXS and GISAXS were used to observe the evolution of micro-structure and crystallinity during the degradation process in air under illumination. The stability increasement mainly comes from morphology modification rather than photo-oxidation, which was proved with charge mobility measurement and UV-vis spectrum.
Keywords: Organic solar cells; Photovoltaics; Solid additive; Stability; operando GIWAXS