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<p>A nonfused ring electron acceptor (NFREA), designated as <b>TT-Ph-C6</b>, has been synthesized with the aim of enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). By integrating asymmetric phenylalkylamino side groups, <b>TT-Ph-C6</b> demonstrates excellent solubility and its crystal structure exhibits compact packing structures with a three-dimensional molecular stacking network. These structural attributes markedly promote exciton diffusion and charge carrier mobility, particularly advantageous for the fabrication of thick-film devices. <b>TT-Ph-C6</b>-based devices have attained a PCE of 18.01% at a film thickness of 100&#xa0;nm, and even at a film thickness of 300&#xa0;nm, the PCE remains at 14.64%, surpassing that of devices based on 2BTh-2F. These remarkable properties position <b>TT-Ph-C6</b> as a highly promising NFREA material for boosting the efficiency of OSCs.<MediaObject ID="MO30"> <ImageObject Color="Color" FileRef="MediaObjects/40820_2025_1905_Figa_HTML.png" Format="PNG" Height="586" Rendition="HTML" Resolution="300" Type="LinedrawHalftone" Width="968" /> </MediaObject></p>

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Asymmetric Side-Group Engineering of Nonfused Ring Electron Acceptors for High-Efficiency Thick-Film Organic Solar Cells

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月10日

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  • Dawei Li,
  • Nan Wei,
  • Ya-Nan Chen,
  • Xiaodong Wang,
  • Xu Han,
  • Ziqing Bian,
  • Xinyuan Zhang,
  • Zhe Zhang,
  • Wenkai Zhang,
  • Xinjun Xu,
  • Cuihong Li,
  • Yahui Liu,
  • Hao Lu,
  • Zhishan Bo

摘要

A nonfused ring electron acceptor (NFREA), designated as TT-Ph-C6, has been synthesized with the aim of enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). By integrating asymmetric phenylalkylamino side groups, TT-Ph-C6 demonstrates excellent solubility and its crystal structure exhibits compact packing structures with a three-dimensional molecular stacking network. These structural attributes markedly promote exciton diffusion and charge carrier mobility, particularly advantageous for the fabrication of thick-film devices. TT-Ph-C6-based devices have attained a PCE of 18.01% at a film thickness of 100 nm, and even at a film thickness of 300 nm, the PCE remains at 14.64%, surpassing that of devices based on 2BTh-2F. These remarkable properties position TT-Ph-C6 as a highly promising NFREA material for boosting the efficiency of OSCs.