In recent years, power conversion efficiency (PCE) of organic solar cells (OSCs) has made significant improvement. A large number of studies were reported to achieve high PCEs through exploring new active layer materials, especially the high efficiency fused ring acceptors (FRAs). Compared with FRAs, another type of so-called unfused-ring acceptors (UFAs), possessing some advantages such as simple synthesis and low cost, have attracted a lot of attention. Herein, a new UFA BTzO-4F, incorporating with a benzotriazole moiety and S⋯O intramolecular noncovalent interactions, has been successfully synthesized. The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8% for UFAs, which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors. Thus, these findings of this work demonstrate the great potential of UFAs for high performance OSCs.

近年来，有机太阳能电池（OSC）的功率转换效率（PCE）取得了显着改善。据报道，通过研究新的活性层材料，尤其是高效稠合环受体（FRA），获得了高PCE的大量研究。与FRA相比，另一类所谓的“不稠环受体”（UFA）具有合成简单，成本低等优点，引起了人们的广泛关注。在此，已经成功地合成了新的UFA BTzO-4F，其结合了苯并三唑部分和S⋯O分子内非共价相互作用。基于PBDB-T的光伏设备：BTzO-4FUFA的PCE达到了创纪录的13.8％，这表明引入苯并三唑部分是获得高质量受体的有效策略。因此，这项工作的这些发现证明了UFA对于高性能OSC的巨大潜力。