Electron transport layer (ETL) plays a vital role in extracting and transporting electrons from perovskite active layer to the cathode in perovskite solar cells (PSCs). It is beneficial for boosting the efficiency and long-term stability of the devices. We skillfully incorporated fullerene and perylene diimide (PDI) and obtained a novel n-self-doping conducive C₆₀-PDI-I dimer ETL. The introduction of C₆₀ to PDI and the presence of intramolecular self-doping caused this hybrid molecule possessed high mobility and excellent defects passivation ability. As a result, C₆₀-PDI-I dimers-based device demonstrated a significantly higher champion power conversion efficiency of 18.29% than the control device based on PCBM (15.60%) and PDI (14.38%). To the best of the authors’ knowledge, this high PCE value is the leading level in the invert PSCs based PDI derivatives as ETLs. The overall mechanism analysis results showed that the origin enhancement of PCE was attributed to the improved electron extraction, reduced nonradiative recombination, and excellent defect passivation. Additionally, the long-term stability of devices based on C₆₀-PDI-I dimers was significantly enhanced, owing to the strong hydrophobic properties of C₆₀-PDI-I dimers. The successful application of C₆₀-PDI hybrid dimmers provide a new insight for designing novel PDI-based electron transport materials.

电子传输层（ETL）在钙钛矿太阳能电池（PSC）中将电子从钙钛矿活性层提取和传输到阴极起着至关重要的作用。这对于提高设备的效率和长期稳定性是有益的。我们熟练地掺入了富勒烯和per二酰亚胺（PDI），并获得了一种新型的n型自掺杂导电C ₆₀ -PDI-1二聚体ETL。C ₆₀向PDI的引入以及分子内自掺杂的存在使得该杂化分子具有高迁移率和优异的缺陷钝化能力。结果，C ₆₀-基于PDI-1二聚体的设备显示出的冠军功率转换效率比基于PCBM的控制设备（15.60％）和PDI的控制设备（14.38％）显着更高。据作者所知，此高PCE值在基于反向PSC的PDI衍生物（如ETL）中处于领先水平。总体机理分析结果表明，PCE的起源增加归因于电子提取的改善，非辐射复合的减少以及优异的缺陷钝化。此外，基于C的设备的长期稳定性₆₀ -PDI-I二聚体被显著增强，由于C的强疏水性₆₀ -PDI-I二聚体。C ₆₀的成功应用-PDI混合调光器为设计新颖的基于PDI的电子传输材料提供了新的见识。