Journal Article

IMPULSE-2019-00042

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Monitoring the Swelling Behavior of PEDOT:PSS Electrodes under High Humidity Conditions

Bießmann, L. ; Kreuzer, L. P. ; Widmann, T. ; Hohn, N. ; Moulin, J.-F.MLZ* ; Müller-Buschbaum, P. (Corresponding author)MLZ*

2018
Soc. Washington, DC

Please use a persistent id in citations: doi:10.1021/acsami.8b00446

Abstract: Polymer electrodes made of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) are used in many applications but are also sensitiveto humidity. We study humidity-induced changes of PEDOT:PSS electrodes asmonitored with in situ time-of-flight neutron reflectivity (TOF-NR) measurementsunder high humidity conditions. The influence of the solvent additive Zonyl and apost-treatment of PEDOT:PSS films with ethylene glycol (EG) serving as electrodesare analyzed with respect to the swelling ratio and water uptake. Depending on theapplied PEDOT:PSS treatment, PEDOT and PSS enrichment layers are clearlyidentified with TOF-NR at the substrate−polymer and polymer−air interface,respectively. The additive Zonyl reduces the water uptake and limits film swelling.EG post-treatment further increases hydrophobicity and thereby water incorporationinto the PEDOT:PSS film is strongly suppressed. The characteristic time constantsand effective interaction parameters extracted from the kinetic NR data show thatadditive and post-treatment reduce the sensitivity of the PEDOT:PSS electrodes tohumidity.

Keyword(s): Energy (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. REFSANS

Experiment(s):

1. REFSANS: Horizontal TOF Reflectometer with GISANS option (NL2b)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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