The ethylene fused PDI oligomers, especially for the dimer (PDI2), have emerged as alternative building blocks to the parent PDI in constructing NFAs owing to their outstanding optoelectronic properties, twisted configurations as well as concise gram-scale synthesis. In this work, a non-fullerene acceptor (NFA) based on tetraphenylethylene (TPE) core flanked with four PDI2 units, coded as TPE-4PDI2, was designed and synthesized. The analogue (TriPE-3PDI2) which consists of triphenylethylene (TriPE) and three PDI2 panels was synthesized for comparison. OSCs based on TPE-4PDI2 show a best PCE of 7.10%, which is much higher than that of TriPE-3PDI2 based ones. Moreover, this PCE is also higher than that of TPE-4PDI based devices (5.53%). To the best of our knowledge, the PCE of 7.10% is among the highest values for TPE-cored NFAs based OSCs. These results indicate that PDI2 is a promising building block for constructing high performance NFAs. And this work provides a facile and effective molecule-designing method to promote the PCE of PDI based non-fullerene OSCs.

乙烯稠合的PDI低聚物，特别是用于二聚体（PDI2）的低聚物，由于其出色的光电性能，扭曲的构型以及简洁的克级合成，已成为NFA中母体PDI的替代构建基。在这项工作中，设计并合成了基于四苯基乙烯（TPE）核心的非富勒烯受体（NFA），其侧翼为四个PDI2单元，编码为TPE-4PDI2。为了比较，合成了由三苯乙烯（TriPE）和三个PDI2面板组成的类似物（TriPE-3PDI2）。基于TPE-4PDI2的OSC的最佳PCE为7.10％，远高于基于TriPE-3PDI2的OSE。此外，该PCE也高于TPE-4PDI基于设备的设备（5.53％）。据我们所知，PCE为7.10％，是基于TPE的基于NFA的OSC的最高值。这些结果表明，PDI2是构建高性能NFA的有前途的构建基块。这项工作为促进基于PDI的非富勒烯OSC的PCE提供了一种简便有效的分子设计方法。