Ternary polymer solar cells (PSCs) based on multiple materials with level matching and complementary absorptions are regarded as an efficient way to overcome the light‐harvesting restriction to surpass high‐performance binary PSCs. This study introduces the third component, nonfullerene acceptor IEICO, into binary PSC‐based PBDTBDD:PC₇₁BM to fabricate ternary PSC with one donor and two acceptors. By carefully tuning the third component ratio and cathode engineering, the resulting ternary PSC shows a power conversion efficiency of 10.51%, greatly improved in comparison with binary PSCs‐based PBDTBDD:PC₇₁BM (7.86%) and PBDTBDD:IEICO (5.19%). In addition to extended light absorption, the third component IEICO could accelerate charge‐carrier transfer, decrease charge recombination, and increase electron collection, resulting from cascade energy levels, and ameliorate the device morphology to increase the contact area of the active layer and cathode buffer layer. This work demonstrates that ternary PSC incorporated with IEICO is a promising structure for producing high performance PSCs.

中文翻译：

---

通过配合富勒烯和非富勒烯受体将高性能三元聚合物太阳能电池的光响应范围扩大到近红外区域

基于具有能级匹配和互补吸收的多种材料的三元聚合物太阳能电池（PSC）被认为是克服光捕获限制以超越高性能二元PSC的有效方法。这项研究将非富勒烯受体IEICO的第三部分引入到基于PSC的二元PBDTBDD：PC ₇₁ BM中，以制造具有一个供体和两个受体的三元PSC。通过仔细调整第三组分的比例和阴极工程设计，所得三元PSC的功率转换效率为10.51％，与基于二进制PSC的PBDTBDD：PC ₇₁相比，功率转换效率大大提高。BM（7.86％）和PBDTBDD：IEICO（5.19％）。除扩展的光吸收外，IEICO的第三种成分还可以加速电荷-载流子的转移，减少电荷的复合，并增加电子的收集，这是由级联能级引起的，并改善了器件的形态，从而增加了活性层和阴极缓冲层的接触面积层。这项工作表明，与IEICO结合的三元PSC是生产高性能PSC的有前途的结构。