Triazatruxene‐Diketopyrrolopyrrole Dumbbell‐Shaped Molecules as Photoactive Electron Donor for High‐Efficiency Solution Processed Organic Solar Cells

Stepwise construction of functional triazatruxene platforms allow linking to preorganized diketopyrrolopyrrole bearing thienyl subunits. These dyes exhibit strong absorption until 750 nm in thin films and show favorable redox activity allowing producing efficient organic solar cells when blended in solution with PC71BM. A maximum power conversion efficiency of 5.3% was obtained.