Zhou Guorong, Luo Xin, Wang Zhen, Ding Changzeng, Guo Yuxiao, Ma Changqi, Xu Bo
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
i-Lab & Printable Electronics Research Center, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, 215123, China.
ChemSusChem. 2025 Feb 1;18(3):e202401629. doi: 10.1002/cssc.202401629. Epub 2024 Oct 29.
Fullerene-based derivatives are frequently used as electron transport materials (ETMs) and interface buffers for perovskite solar cells (PSCs) due to their excellent properties, including high electron affinity and mobility, low recombination energy, tunable energy levels, and solution processability. However, significant challenges arise because fullerene derivatives tend to aggregate and dimerize, which reduces exciton dissociation and charge transport capacity. Additionally, their chemical compatibility with perovskite absorbers facilitates halide diffusion and degradation of PSCs. This overlap causes delamination and dissolution during device fabrication, hindering the performance enhancement of fullerene-based PSCs. To address these issues, researchers have developed cross-linkable fullerene materials. These materials have been shown to not only significantly improve the power conversion efficiency (PCE) of PSCs but also effectively enhance the device stability. In this review, we summarized recent research progress on cross-linkable fullerene derivatives as ETMs for PSCs. We systematically analyze the impact of these cross-linked ETMs on device performance and long-term stability, focusing on their molecular structures and working mechanisms. Finally, we discuss the future challenges that need to be overcome to advance the application of cross-linkable fullerene materials in PSCs.
基于富勒烯的衍生物因其优异的性能，包括高电子亲和力和迁移率、低复合能量、可调节的能级以及溶液可加工性，而经常被用作钙钛矿太阳能电池（PSC）的电子传输材料（ETM）和界面缓冲层。然而，由于富勒烯衍生物倾向于聚集和二聚化，这降低了激子解离和电荷传输能力，因此出现了重大挑战。此外，它们与钙钛矿吸收剂的化学兼容性促进了卤化物扩散和PSC的降解。这种重叠在器件制造过程中导致分层和溶解，阻碍了基于富勒烯的PSC的性能提升。为了解决这些问题，研究人员开发了可交联的富勒烯材料。这些材料已被证明不仅能显著提高PSC的功率转换效率（PCE），还能有效增强器件稳定性。在这篇综述中，我们总结了作为PSC的ETM的可交联富勒烯衍生物的最新研究进展。我们系统地分析了这些交联ETM对器件性能和长期稳定性的影响，重点关注它们的分子结构和工作机制。最后，我们讨论了推进可交联富勒烯材料在PSC中的应用需要克服的未来挑战。
