Stepwise Assembled Photoactive Films Containing Donor-Linked Fullerenes

Stable multilayer systems of C60-based materials were assembled on photactive indium tin oxide (ITO) electrodes by supramolecular layer-by-layer organization. The assembled ensembles comprise a positively charged fulleropyrrolidinium salt (see scheme) and a series of positively charged ruthenium(II)-polypyridyl-fullerene donor–acceptor dyads. Upon irradiation with light of an appropriate wavelength efficient generation of photocurrent can be observed, whose intensity increases linearly with the number of deposited monolayers.