Shao Cong, He Jingyi, Ma Jiaxin, Wang Yirong, Niu Guosheng, Zhang Pengfei, Yang Kaiyi, Zhao Yao, Wang Fuyi, Li Yongjun, Wang Jizheng
CAS Key Laboratory of Organic Solids, Institute of Chemistry, Beijing National Laboratory for Molecular Sciences, Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Nanomicro Lett. 2025 Jan 28;17(1):121. doi: 10.1007/s40820-024-01630-y.
Finding ways to produce dense and smooth perovskite films with negligible defects is vital for achieving high-efficiency perovskite solar cells (PSCs). Herein, we aim to enhance the quality of the perovskite films through the utilization of a multifunctional additive in the perovskite anti-solvent, a strategy referred to as anti-solvent additive engineering. Specifically, we introduce ortho-substituted-4'-(4,4″-di-tert-butyl-1,1':3',1″-terphenyl)-graphdiyne (o-TB-GDY) as an AAE additive, characterized by its sp/sp-cohybridized and highly π-conjugated structure, into the anti-solvent. o-TB-GDY not only significantly passivates undercoordinated lead defects (through potent coordination originating from specific high π-electron conjugation), but also serves as nucleation seeds to effectively enhance the nucleation and growth of perovskite crystals. This markedly reduces defects and non-radiative recombination, thereby increasing the power conversion efficiency (PCE) to 25.62% (certified as 25.01%). Meanwhile, the PSCs exhibit largely enhanced stability, maintaining 92.6% of their initial PCEs after 500 h continuous 1-sun illumination at ~ 23 °C in a nitrogen-filled glove box.
找到制备致密、光滑且缺陷可忽略不计的钙钛矿薄膜的方法对于实现高效钙钛矿太阳能电池（PSC）至关重要。在此，我们旨在通过在钙钛矿反溶剂中使用多功能添加剂来提高钙钛矿薄膜的质量，这种策略被称为反溶剂添加剂工程。具体而言，我们将邻位取代的4'-(4,4″-二叔丁基-1,1':3',1″-三联苯)-石墨二炔（o-TB-GDY）作为一种AAE添加剂引入反溶剂中，其特征在于其sp/sp共杂化和高度π共轭结构。o-TB-GDY不仅能显著钝化欠配位的铅缺陷（通过源自特定高π电子共轭的强配位作用），还能作为成核种子有效促进钙钛矿晶体的成核和生长。这显著减少了缺陷和非辐射复合，从而将功率转换效率（PCE）提高到25.62%（经认证为25.01%）。同时，PSC表现出大大增强的稳定性，在氮气填充的手套箱中于约23°C下连续1太阳光照500小时后，仍保持其初始PCE的92.6%。
