Efficient and Mechanically Robust Ultraflexible Organic Solar Cells Based on Mixed Acceptors

摘要： A simple strategy to simultaneously improve power conversion efficiency (PCE) and mechanical stability of ultra?exible organic solar cells is reported. By using a fullerene/non-fullerene mixed acceptor, 3-mm-thick ultra?exible organic solar cells achieve a PCE of 13% (a certi?ed value of 12.3%) with 97% PCE retention after 1,000 bending cycles and 89% PCE retention after 1,000 compression-stretching cycles.