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Wide‐bandgap (WBG) nonfullerene acceptors (NFAs) with nonfused conjugated structures play a critical role in organic photovoltaic (OPV) cells. Here, NFAs named GS‐OEH, GS‐OC6, and GS‐ISO, with optical bandgaps larger than 1.70 eV, are synthesized without using the fused ring structures. Compared with GS‐OEH and GS‐OC6, GS‐ISO exhibits much stronger crystallinity, leading to a smaller energetic disorder...
Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE of 19.0% (certified value of 18.7%) is achieved in single‐junction OPV cells by combining material design with a ternary blending strategy. An active layer comprising a new wide‐bandgap polymer donor named PBQx‐TF and a new low‐bandgap non‐fullerene acceptor...
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