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A new building block of two-dimensional (2D) A1-π-A2 copolymers for P(dDTPz-ID) and P(dDTPz-DTBT) was designed and synthesized. Their structures have two strong acceptor units (isoindigo and benzothiadiazole derivatives) in the backbone, respectively. It displayed a benefit of A1-A2 building blocks, which is complementary and broad light absorption from 300 to 750 nm due to acceptors with different...
Donor–acceptor-type polymers, PBDPBT-T, PBDPBT-TT, and PBDPBT-biT, were polymerized via Stille coupling reactions. In the unfavorable mode of DFT calculations, the distance between BDP in the two different polymer main chains showed different distance of repeating unit (Dn) according to the π-spacers type. Especially, PBDPBT-TT caused larger D2 than PBDPBT-T and PBDPBT-biT. The UV–vis absorption spectra...
Three quinacridone-benzoxadiazole polymers containing different spacers (PQcOx-T, PQcOx-TT and PQcOx-biT) are obtained via Suzuki coupling reaction to control the energy levels and curvature of the polymer backbones. We find a structural relationship between the polymer backbone and crystallinity, especially regarding packing orientation. PQcOx-T exhibits a zigzag conformation with a dihedral angle...
Controlling solid-state order of π-conjugated polymers through macromolecular design is essential for achieving high electronic device performance. Our work investigates the various effects of polymer structure on solid-state packing, especially, regarding polymer-packing orientation (edge-on vs. face-on). Various number of thiophene-containing isoindigo polymers (P4TI, P4TI-3, P4TI-4, P6TI-3 and...
A new acceptor unit with high solubility octyloxy-diphenylquinoxaline was synthesized with octyloxy-dibenzophenazine. The new D–A type polymers poly(carbazole-octyloxy diphenylquinoxaline) (PCzPDTQ) and octyloxy-dibenzophenazine) (PCzFDTQ), which adopted carbazole as a donor, were polymerized through a Suzuki coupling reaction. PCzPDTQ and PCzFDTQ dissolved in organic solvents and showed high thermal...
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