Single-junction fullerene solar cells with 10% efficiency and high open-circuit voltage approaching 1Â V

The D-A(π)-Q-A(π) arrangement has been proven to be one effective strategy to construct high-performance photovoltaic materials. Combined with side-chain engineering, three new polymers P1-P3 are constructed with high VOCs of > 0.90 V and small Elosss of 0.73-0.78 eV. More encouragingly, P2-based devices exhibit high PCE of 10.30% and VOC of 0.97 V, one of the highest values for polymer/fullerene-based solar cells.168