Organic photovoltaic cell with 17% efficiency and superior processability

The development of organic photoactive materials, especially the newly emerging non-fullerene electron acceptors (NFAs), has enabled rapid progress in organic photovoltaic (OPV) cells in recent years. Although the power conversion efficiencies (PCEs) of the top-performance OPV cells have surpassed 16%, the devices are usually fabricated via a spin-coating method and are not suitable for large-area production. Here, we demonstrate that the fine-modification of the flexible side chains of NFAs can yield 17% PCE for OPV cells. More crucially, as the optimal NFA has a suitable solubility and thus a desirable morphology, the high efficiencies of spin-coated devices can be maintained when using scalable…

• NN
  National Natural Science Foundation of China

  Awards: 51961135103, 51673201, 21835006, 2019B030302007, 2019YFA0705900, 21805287, 201903
• CP
  China Postdoctoral Science Foundation

  Award: 2019M660800
• YI
  Youth Innovation Promotion Association of the Chinese Academy of Sciences

  Award: 2018043
• NK
  National Key Research and Development Program of China

  Award: 2019YFA0705900
• FR
  Fundamental Research Funds for the Central Universities

  Award: 201903
• YI
  Youth Innovation Promotion Association

  Award: 2018043
• BN
  Beijing National Laboratory for Molecular Sciences

  Award: BNLMS-CXXM-201903