Publication

Abstract : We have introduced functionalized multiwalled carbon nanotubes(CNTs) in donor/acceptor-type photovoltaic devices. We fabricated the devices based on heterostructure between polymer-CNT composite and buckminsterfullerene (C60)(C60) layers. Due to the functional groups of the CNTs, a homogeneous blend of CNT-polymer composite could be obtained. In the composite, the nanotubes acted as excitondissociation sites and also hopping centers for hole transport. The CNTs in the polymer-CNT∕C60polymer-CNT∕C60device provided higher excitondissociation volume and increased mobility for carrier transport. We have observed an increase in open-circuit voltage and short-circuit current in the polymer-CNT∕C60polymer-CNT∕C60devices as compared to the polymer∕C60polymer∕C60 ones.