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.
- conjugated polyelectrolytes (CPE)
- Bunte salts
- charge injection interlayer
- conjugated polymer bilayer
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