articleNature CommunicationsMay 11, 2022GOLD OA

Asymmetric electron acceptor enables highly luminescent organic solar cells with certified efficiency over 18%

CHChengliang HeZCZeng ChenTWTonghui WangZSZiqiu ShenYLYaokai Li

State Key Laboratory of Silicon Materials · Zhejiang University · +6 more institutions

PubMed
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Abstract

Enhancing the luminescence property without sacrificing the charge collection is one key to high-performance organic solar cells (OSCs), while limited by the severe non-radiative charge recombination. Here, we demonstrate efficient OSCs with high luminescence via the design and synthesis of an asymmetric non-fullerene acceptor, BO-5Cl. Blending BO-5Cl with the PM6 donor leads to a record-high electroluminescence external quantum efficiency of 0.1%, which results in a low non-radiative voltage loss of 0.178 eV and a power conversion efficiency (PCE) over 15%. Importantly, incorporating BO-5Cl as the third component into a widely-studied donor:acceptor (D:A) blend, PM6:BO-4Cl, allows device displaying a high…

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Topics & keywords

Topics
Keywords
  • Luminescence
  • Organic solar cell
  • Acceptor
  • Materials science
  • Electroluminescence
  • Energy conversion efficiency
  • Quantum efficiency
  • Fullerene
UN Sustainable Development Goals
  • Affordable and clean energy
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