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<p>Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has been substantially advanced by optimizing the acceptors and cathode interface layers (CILs). Perylene diimide (PDI) has been universally used in acceptors and CILs for OSCs owing to its chemical and photothermal stability, structural tunability, and high electron mobility. Nevertheless, the high planarity of PDI tends to result in excessive aggregation, which suppresses the PCE of the OSCs. Notably, the <i>bay</i>-functionalization strategy of PDI can optimize the light absorption properties, charge transfer (CT), and aggregation behavior, which dramatically boost the PCE of OSCs. Here, a systematic summary of acceptors and CILs based on the <i>bay</i>-substitution of PDI is reviewed. First, the progress history and working principle of OSCs are reviewed, and the mechanisms of the acceptors and CILs, as well as the functional properties of the disparate positions of PDI, are elaborated. Second, the relationship between the performance and structure of the <i>bay</i>-modified PDI acceptors and CILs was discussed in depth. Finally, the conclusions and outlooks of acceptors and CILs for <i>bay</i>-substituted PDI are presented. This review provides valuable insights for optimizing the performance of OSCs by modifying the PDI in <i>bay</i> regions.</p>

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Recent progress of bay-functionalization perylene diimide acceptors and cathode interface layers in organic solar cells

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • Shuhua Wang,
  • Dan Zhou,
  • Zhentian Xu,
  • Jiangang Ma,
  • Wei Ding,
  • Jun Mao,
  • Jingyun Huang,
  • Bin Hu,
  • Fang Wang,
  • Ruizhi Lv,
  • Haitao Xu,
  • Lie Chen

摘要

Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has been substantially advanced by optimizing the acceptors and cathode interface layers (CILs). Perylene diimide (PDI) has been universally used in acceptors and CILs for OSCs owing to its chemical and photothermal stability, structural tunability, and high electron mobility. Nevertheless, the high planarity of PDI tends to result in excessive aggregation, which suppresses the PCE of the OSCs. Notably, the bay-functionalization strategy of PDI can optimize the light absorption properties, charge transfer (CT), and aggregation behavior, which dramatically boost the PCE of OSCs. Here, a systematic summary of acceptors and CILs based on the bay-substitution of PDI is reviewed. First, the progress history and working principle of OSCs are reviewed, and the mechanisms of the acceptors and CILs, as well as the functional properties of the disparate positions of PDI, are elaborated. Second, the relationship between the performance and structure of the bay-modified PDI acceptors and CILs was discussed in depth. Finally, the conclusions and outlooks of acceptors and CILs for bay-substituted PDI are presented. This review provides valuable insights for optimizing the performance of OSCs by modifying the PDI in bay regions.