Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster 1
CPP 12.65: Poster
Montag, 5. September 2022, 18:00–20:00, P1
Polysulfobetaines as electron transport layers in organic solar cells employing a PBDBTCl-DTBT:BTP-4F active layer — •Sebastian Coen1, Apostolos Vagias2, Johanna Eichhorn3, Lukas Spanier1, Zerui Li1, Xinyu Jiang1, André Laschewsky4,5, and Peter Müller-Buschbaum1,2 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2MLZ, TU München, 85748 Garching — 3WSI, TU München, AG Experimentelle Halbleiterphysik, 85748 Garching — 4Universität Potsdam, Institut für Chemie, 14476 Potsdam-Golm — 5Fraunhofer IAP, 14476 Potsdam-Golm
Zwitterionic polymers (e.g. polysulfobetaines) have so far been systematically explored as antifouling agents due to their total electroneutrality and superhydrophilicity. These macromolecules carry a permanent dipole moment because of the simultaneous presence of positive and negative charges on the backbone. However, this dipole moment can affect the optoelectronic properties and charge transport when such polymers are considered as interlayers for organic solar cells. So far, the role of polyzwitterions as interlayers of organic photovoltaics remains unexplored. We investigate the use of one specific polysulfobetaine (PSPE) in this work. We study its optoelectronic and morphological properties under the aspect of usage in an organic solar cell. For this solar cell, we use an active layer of a PBDBTCl-DTBT:BTP-4F blend with an architecture of ITO/PEDOT:PSS/Active Layer/PSPE or PDIN/Ag. PDIN is a reference electron transport layer material showing similar band positions as PSPE.