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<p>Two conjugated dithienopyrrole-alt-benzothiadiazole based donor–acceptor copolymers (<b>DTP1TBT-8</b> and <b>DTP2TBT-8</b>) were prepared successfully via Stille copolymerization and exhibited molar mass of 14,300 and 31,900&#xa0;Da, respectively. The dithienopyrrole moiety was functionalized with pentylhexyl and used as an electron donor, whereas the benzothiadiazole moiety was functionalized with octyloxy and used as an electron acceptor. The two moieties were connected with number of thienyl spacers to produce the target polymers for use as <i>p</i>-type materials in polymer solar cells in combination with fullerene/nonfullerene derivatives. The attained copolymers, <b>DTP1TBT-8</b> and <b>DTP2TBT-8</b>, have been analyzed via <sup>1</sup>H NMR, GPC and XRD to determine the macromolecular characteristic properties, chemical compositions as well as the chemical structures. Also, the two attained copolymers have been inspected for the thermal, electrical and optical properties including TGA, CV and UV–Vis, respectively. Based on the UV–vis and CV results, it revealed that <b>DTP1TBT-8</b> and <b>DTP2TBT-8</b> exhibited not only a medium optical-bandgap of 1.67&#xa0;eV and 1.69&#xa0;eV but also a moderate HOMO level of − 5.00 and − 5.07&#xa0;eV, respectively.</p>

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Two Donor/Acceptor Copolymers Based on Pentylhexyl-Functionalised Dithienopyrrole for Application in Organic Solar Cells

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • Bakhet A. Alqurashy,
  • Ahmed Iraqi

摘要

Two conjugated dithienopyrrole-alt-benzothiadiazole based donor–acceptor copolymers (DTP1TBT-8 and DTP2TBT-8) were prepared successfully via Stille copolymerization and exhibited molar mass of 14,300 and 31,900 Da, respectively. The dithienopyrrole moiety was functionalized with pentylhexyl and used as an electron donor, whereas the benzothiadiazole moiety was functionalized with octyloxy and used as an electron acceptor. The two moieties were connected with number of thienyl spacers to produce the target polymers for use as p-type materials in polymer solar cells in combination with fullerene/nonfullerene derivatives. The attained copolymers, DTP1TBT-8 and DTP2TBT-8, have been analyzed via 1H NMR, GPC and XRD to determine the macromolecular characteristic properties, chemical compositions as well as the chemical structures. Also, the two attained copolymers have been inspected for the thermal, electrical and optical properties including TGA, CV and UV–Vis, respectively. Based on the UV–vis and CV results, it revealed that DTP1TBT-8 and DTP2TBT-8 exhibited not only a medium optical-bandgap of 1.67 eV and 1.69 eV but also a moderate HOMO level of − 5.00 and − 5.07 eV, respectively.