Yuandong's work is accepted in JACS

Organic photovoltaics (OPVs) suffer from a trade-off between efficient charge transport and suppressed non-radiative recombination due to the aggregation induced luminance quenching. In this work, by introducing a π-extended non-fullerene acceptor B6Cl into a range of photovoltaic systems, shortened π-π stacking distance with ordered alkyl chain packing is received, leading to simultaneously improved J_SC, V_OC and FF with power conversion efficiency of 20.2%.