Strasbourg (F).

Two main classes of semiconducting molecules are commonly used for opto-electronic applications: polymers, featuring an easy solution-processability in thin and uniform yet poorly ordered films, and small poly-aromatic molecules, forming highly defined (liquid)-crystalline architectures with excellent charge mobility. Herein, we combine the two material types by employing structurally well-defined polyisocyanopeptide polymers (PIC) as scaffolds to precisely arrange thousands of electron accepting molecules, i.e. perylene-bis(dicarboximides) (PDIs), in hundreds of nanometer long, well-defined chromophoric wires (fig. 1).[1] The PIC polymer backbone enforces high control over the spatial location of PDI dyes favoring both enhanced exciton and charge transfer. By adding to a monomeric PDI polycrystalline film just 17 % of the PIC-PDI polymer, acting as percolation pathways for charge transfer between the different crystals, we obtained a two orders of magnitude increase in charge carrier mobility within the film, as measured in thin film transistor (TFT) devices (fig. 2).[2,3] Furthermore, the photovoltaic activity of this polymeric PIC-PDI shows a significant improvement, respect to monomeric PDI, when blended with regio-regular poly(3