  Blends of carbon nanotubes with conjugated polymer and fullerene derivatives
are complex nanocomposite systems, which have recently attracted a great
research interest for their photovoltaic ability. Therefore, gaining a better
understanding of the excitonic dynamics in such materials can be important to
boost the efficiency of excitonic solar cells. Here, we studied the
photophysics of a ternary system in which the polymer PTB7 and the fullerene
derivative PCBM are integrated with (6,5) SWNTs. We highlight the contribution
of SWNTs in the exciton dissociation and in the charge transfer process. These
findings can be useful for the exploitation of these multi-component systems
for organic photovoltaic and, in general, optoelectronic applications.
