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Title: Phosphonium‐based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self‐assembly and photovoltaic performances
Authors: Chevrier, Michele
KESTERS, Jurgen 
Houston, Judith E.
Van den Brande, Niko
CHAMBON, Sylvain 
Richeter, Sebastien
Van Mele, Bruno
Arnold, Thomas
Mehdi, Ahmad
Lazzaroni, Roberto
Dubois, Philippe
Evans, Rachel C.
MAES, Wouter 
Clement, Sebastien
Issue Date: 2021
Publisher: WILEY
Source: POLYMER INTERNATIONAL, 70(4), p. 457-466.
Abstract: Phosphonium-based polythiophene conjugated polyelectrolytes (CPEs) with three different counterions (dodecylsulfate, octylsulfate and perfluorooctane sulfonate) are synthesized to determine how the nature of the counterion affects the thermal properties, the self-assembly in thin films and the performance as the cathode interfacial layer in polymer solar cells (PSCs). The counterion has a significant effect on the thermal properties of the CPEs, affecting both their glass transition and crystalline behaviour. Grazing-incidence wide-angle X-ray scattering studies also indicate that changing the nature of the counterion influences the microstructural organization in thin films (face-onversusedge-on orientation). The affinity of the CPEs with the underlying photoactive layer in PSCs is highly correlated with the counterion species. Finally, in addition to an increase of the power conversion efficiency ofca15% when using these CPEs as cathode interfacial layers in PSCs, a higher device stability is noted, compared to a reference device with a calcium interlayer. (c) 2020 Society of Industrial Chemistry
Notes: Clement, S (corresponding author), Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France.
Other: Clement, S (corresponding author), Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France.
Keywords: conjugated polyelectrolytes;surfactant counteranion;self-assembly;thin films;cathode interlayers;organic solar cells
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ISSN: 0959-8103
e-ISSN: 1097-0126
DOI: 10.1002/pi.6088
ISI #: WOS:000559473100001
Rights: © 2020 Society of Industrial Chemistry
Category: A1
Type: Journal Contribution
Validations: ecoom 2021
Appears in Collections:Research publications

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