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

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