The influence of polyanilines (PANIs) as hole conductors on the photovoltaic behaviors of dye-sensitizedsolar cells is studied. The current−voltage (I−V) characteristics and the incident photon to current conversionefficiency (IPCE) curves of the devices are determined as the function of different conductivities andmorphologies of PANIs. The results show that the conductivity of PANIs affects the performance of thedevices greatly, and PANI with the intermediate conductivity value (3.5 S/cm) is optimum. In addition,the effects of both the film formation property and the cluster size of polyanilines on the photovoltaicbehaviors of the devices are also discussed.
