While there have been numerous studies of C60 or C60-PCBM embedded in a conjugated polymer, fluorinated fullerenes have received not enough attention. We have shown that the advantage of this family of fullerene derivatives is that by a controlling of a substitution one can vary a band gap and an energy level alignment, charge (electron) transport properties. Processes occurring in blends, based on C60Fx- fullerenes and conjugated polymers have been characterized using an absorption spectrum, PL quenching, a cyclic voltammogram (CV) and field effect transistor (TFT) measurements.
It has been found that C60Fx acts as p-type dopant, when blended in the semiconducting polymers. The ground-state electron accepting characteristics of halogenated fullerenes C60Fx have been considered and envisioned that these electron acceptor species, having a wide and tunable range of HOMO and LUMO values, can be used as novel effective tunable dopants to produce high quality organic diodes, transistors as well as diode-based solar cells.