Scott Himmelberger

TL;DR: It is shown that blends comprising a small amount of semiconducting polymer mixed into an insulating polymer matrix actually perform very poorly in the undoped state, and that mobility and on/off ratio are improved dramatically upon moderate doping.

TL;DR: The comparison between the regioregular and regioirregular polymers shows how the use of large planar functional groups leads to improved charge transport, with mobilities that are less affected by chemical and structural disorder with respect to classic semicrystalline polymers such as poly(3-hexylthiophene).

TL;DR: It is demonstrated that local aggregation over very few chains is a sufficient mesoscopic structure to ensure high mobility, with charge transport mainly occurring along the polymer backbones, and that extended crystallinity is not necessary.

TL;DR: In this paper, structural factors influence the photogeneration and collection of charge carriers as well as charge carrier recombination and the related open-circuit voltage in polymer:fullerene solar cells.

TL;DR: In this article, two pairs of indacenodithiophene (IDT) and quinoxaline-based copolymers with meta- or para-hexyl-phenyl side chains on the IDT unit are synthesized.