Synthesis and performance of cross-linked PEDOT:MOI-P(SS-HEA) transparent conductive films by UV irradiation

Abstract

A novel multi-functional counteranion of methacryloyloxyethyl isocyanate grafting poly(styrene sulfonate-co-2-hydroxyethyl acrylate) [MOI-P(SS-HEA)] for PEDOT was designed to improve the humidity stability and water resistance of PEDOT:PSS-based conductive films.

PEDOT:PSS interfaces stabilised using a PEGylated crosslinker yield improved conductivity and biocompatibility

“…Previous reports have demonstrated PEDOT:PSS as cytocompatible in vitro 14 ; however, crosslinking of PEDOT:PSS is often essential in order to prevent delamination and redispersion of conducting PEDOT:PSS films placed in aqueous physiological conditions for long-term applications. Efforts have explored methods such as UV light 15 , poly (ethylene oxide) treatment 16 and in particular the use of silanes 17 ; with notable attention focused towards glycidoxy propyltrimethoxysilane (GOPS) crosslinking of PEDOT:PSS 2D films 18 and 3D scaffolds 19 . Such GOPS crosslinking is based on a hypothesis that the epoxy ring group in GOPS reacts with sulfonic groups of PSS chains leading to a change in PEDOT:PSS film morphology while the oxidation level of PEDOT remains unaffected 18 .…”