Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Organic Electronics and Photovoltaics 1
CPP 1.8: Vortrag
Montag, 5. September 2022, 11:45–12:00, H38
Cycling stability of cellulose-based electronics — •Stephan V. Roth1,2, Calvin J. Brett1,2, Ola K. Forslund1, Elisabetta Nocerino1, Lucas P. Kreuzer3, Lionel Porcar4, Norifumi L. Yamada5, Martin Mansson1, Peter Müller-Buschbaum3, and L. Daniel Söderberg1 — 1KTH Royal Institute of Technology, SE-10044 Stockholm — 2DESY, D-22607 Hamburg — 3TU München, Physik-Department, Lehrst. f. Funktionelle Materialien, D-85748 Garching — 4ILL, F-38042 Grenoble — 5KEK, Tokai (JPN)
In organic electronics, hybrid materials combining high-strength biomaterials and conducting organic polymers allow for disentangling mechanical flexibility and functionality. Yet, degradation in such complex organic electronics applications is still less addressed. We thus combine sprayed cellulose nanofibrils (CNF) templates due to their hierarchical, nanoporous morphology and a conductive polymer blend poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) to correlate the impact of cyclic relative humidity changes with device performance and nanostructure evolution. The conductivity of the CNF/PEDOT:PSS hybrid shows reversible changes: The PEDOT:PSS blend undergoes cyclic wetting/dewetting on the CNF backbone accompanied by swelling and deswelling of PEDOT:PSS moieties in the pores. The cycling stability of the device performance is ensured by reversible rearrangement of the CNF backbone. With CNF acting as structural reinforcing template, interestingly, no macroscopic swelling is observed, proving the applicability in e.g. supercapacitors.