Organic Photovoltaics of Regiorandom Copolymers Composed of Unsymmetric Diketopyrrolopyrrole with Different Alkyl Chain Lengths.

ABSTRACT: Diketopyrrolopyrrole (DPP) is an authentic π-conjugated building unit that has been utilized as the electron acceptor of narrow-bandgap copolymers for organic photovoltaics (OPVs). The conventional DPP unit is symmetrically flanked with identical aromatic rings, whereas unsymmetric DPP with different aromatic units has remained mostly unexplored. Here, we report the synthesis and characterization of DPP copolymers composed of thiophene (Th) and pyridine (Py) as the unsymmetric configuration of side aromatics. The unsymmetric DPP unit is appended with three different lengths of alkyl chain and coupled with a Th donor to simplify the polymer structure, which is in contrast to the benchmark, high-cost benzodithiophene donor. With the elongation of the alkyl chain, a significant deepening of t

SUBMITTER: Kamimura R 

PROVIDER: S-EPMC12658710 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature