Anionic, conjugated thiophene- and fluorene-based polyelectrolytes with alkylthiosulfate side chains undergo hydrolysis under formation of alkylthiol and dialkyldisulfide functions. The hydrolysis products can be deposited onto gold or silver surfaces by self-assembly from solutions of the anionic conjugated polyelectrolyte (CPE) precursors in polar solvents such as methanol. This procedure allows solution-based surface modifications of gold and silver electrodes using environmentally friendly solvents and enables the formation of conjugated polymer bilayers. The herein presented alkylthiosulfate-substituted CPEs are promising candidates for increasing the work function of gold and silver electrodes thus improving hole injection from such electrode assemblies into organic semiconductors.
Kraft, M., Adamczyk, S., Polywka, A., Zilberberg, K., Weijtens, C., Meyer, J., ... Scherf, U. (2014). Polyanionic, alkylthiosulfate-based thiol precursors for conjugated polymer self-assembly onto gold and silver. ACS Applied Materials & Interfaces, 6(14), 11758-11765. https://doi.org/10.1021/am5025148