| 초록 |
We introduce dithienyldiketopyrrolopyrrole (DPP2T) and thienothiophene (TT) building blocks, enabling a large intermolecular overlap through π-π stacking, into an amorphous-like polymer composed of benzodithiophene (BDT) and fluorinated thienothiophene (QTT). Herein, we report the synthesis and characterization of a series of condensed random 2D-2A “quarterpolymers”. In addition to their improved photon absorption characteristics, the resulting quarterpolymers exhibit efficient charge transport properties and low recombination loss via a change in the crystallinity and orientation of the blend films compared to the alternating copolymers. Moreover, by isolating high-quality quarterpolymer via a marginal solvent-soaking technique, the PCE is further boosted to 10.30%. Therefore, our simple 2D-2A strategy, reported here for the first time, should be extended to numerous other quaterpolymer systems, greatly accelerating random polymer systems toward further improving PSCs. |
