2016 Volume 29 Issue 4 Pages 561-564
We have investigated the morphology effect on the nanostructure and the exchange coupling of the interfacial CS states in the RR-P3HT:PC60BM film. In the lower RR-P3HT content, the polymer crystalline phase is not formed by the strong interactions from the PC60BM molecules, resulting in the short-range CS states with the quick energy-wasting recombination. For the higher polymer content, it has been demonstrated that the PC60BM molecules bind to the crystalline polymer regions at the BHJs and that the hole-dissociations take place accompanying the delocalized hole distribution, resulting in the long-lived photocarrier generations. The above structural and electronic properties are essential keys to evaluations, designs, and developments of the highly efficient solar energy-conversion systems employing organic polymers in the OPV systems.