4.7 Article

AzaBenzannulated perylene diimide multimers as electron acceptors for organic solar cells

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MATERIALS CHEMISTRY FRONTIERS
卷 6, 期 21, 页码 3237-3242

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qm00667g

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资金

  1. University of Angers
  2. Canada Foundation for Innovation [34102]
  3. Western Economic Development Fund
  4. Alberta Innovates Strategic Projects Grants Program [G2018000901]
  5. University of Calgary

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In this study, a series of AzaBenzannulated PDI (AzaBPDI) multimers were synthesized and their potential as non-fullerene acceptors in bulk-heterojunction organic solar cells was investigated. The AzaBPDI dimers and trimer were easily prepared through a one-pot sequence of reactions. The AzaBPDI showed strong visible-light absorption and suitable LUMO energy levels, making them promising electron acceptors for organic solar cells. The combination of AzaBPDI with the donor polymer PM6 resulted in high device open-circuit voltages, demonstrating the potential of AzaBPDI for high-performance fullerene-free photovoltaics.
We present herein a series of AzaBenzannulated PDI (AzaBPDI) multimers, with their synthesis, characterizations and applications as non-fullerene acceptors in bulk-heterojunction organic solar cells. AzaBPDI dimers and trimer were prepared by a straightforward one-pot sequence of imine condensation, photocyclization and re-aromatization reactions from easily accessible aminoPDI and commercially available di- or trialdehydes, respectively. Their strong visible-light absorption and LUMO energy levels between -3.53 and -3.63 eV make them suitable electron acceptors for organic solar cells. When associated with the donor polymer PM6, we observed high device open-circuit voltages over 1.1 V, thus demonstrating that the AzaBPDI scaffold has the potential for delivering high performance fullerene-free photovoltaics.

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