Charge Transport in Plastics Increased One Thousand Times
One of the factors that has kept conjugated semiconducting polymers from being even more effective in applications such as organic photovoltaics (OPVs) and organic light-emitting diodes (OLEDs) is the materials’ poor charge carrier mobility. Basically, charge doesn’t move through plastic—even the conjugated variety—as well as it does through silicon. The result is high losses and poor performance.
Nanomaterials such as graphene have been offered up as additives to increase carrier mobility in polymers.
Now researchers at Umeå University in Sweden have developed a novel technique for improving the charge transport mobility of a polymer by more than a thousand times. The researchers were able to achieve this enormous increase without any doping of the polymer; instead, they controlled the orientation of the crystallite formations in the polymer.