Achieving over 11% power conversion efficiency in PffBT4T-2OD-based ternary polymer solar cells with enhanced open-circuit-voltage and suppressed charge recombination

High efficiency ternary polymer solar cell with a maximum PCE of 11.2% was achieved by introducing a medium band gap polymer PCDTBT8 into the crystalline PffBT4T-2OD and PC71BM binary photovoltaic system.347