Premium
An Alternative Anionic Polyelectrolyte for Aqueous PEDOT Dispersions: Toward Printable Transparent Electrodes
Author(s) -
Hofmann Anna I.,
Smaal Wiljan T. T.,
Mumtaz Muhammad,
Katsigiannopoulos Dimitrios,
Brochon Cyril,
Schütze Falk,
Hild Olaf R.,
Cloutet Eric,
Hadziioannou Georges
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201503024
Subject(s) - pedot:pss , materials science , conductive polymer , polymer , aqueous solution , polyelectrolyte , chemical engineering , electrode , polystyrene , transmittance , polymer chemistry , polymerization , composite material , organic chemistry , optoelectronics , chemistry , engineering
Organic conducting polymers are promising electrode materials for printable organic electronics. One of the most studied conducting polymers is PEDOT:PSS, which is sufficiently conductive and transparent, but which shows some drawbacks, such as hygroscopicity and acidity. A new approach to stabilize PEDOT in aqueous dispersions involves the replacement of PSS with a basic polyanion based on a polystyrene backbone with (trifluoromethylsulfonyl)imide (TSFI) side groups. The PEDOT:PSTFSIK dispersions were obtained by oxidative polymerization of EDOT in an aqueous PSTFSIK solution and were characterized with regard to their composition, morphology, doping, rheological behavior, and optoelectronic performance. The PEDOT:PSTFSIK dispersions showed excellent printability and good optoelectronic performance (238 Ohm sq −1 at 91 % transmittance, σ>260 S cm −1 ) and were successfully integrated as flexible electrodes in OLED and OPV devices.