题目：

Ligand-Assisted Coupling Manipulation for Efficient and Stable FAPbI₃ Colloidal Quantum Dot Solar Cells

作者：

Xuliang Zhang^1,2, Hehe Huang^1,2, Lujie Jin^1,3, Chao Wen¹, Qian Zhao⁴, Chenyu Zhao^1,3, Junjun Guo^1,2, Chen Cheng^1,3, Hongshuai Wang^1,3, Liang Zhang^1,2, Youyong Li^1,3, Yin Maung Maung⁵, Jianyu Yuan, ^1,2,* Wanli Ma^1,3,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China

²Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, P. R. China

³Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China

⁴School of Materials Science and Engineering, Nankai University, Tianjin 300350, P. R. China

⁵Department of Physics, University of Yangon, Pyay Road, Yangon 11181, Myanmar

摘要：

For emerging perovskite quantum dots (QDs), understanding the surface features and their impact on the materials and devices is becoming increasingly urgent. In this family, hybrid FAPbI₃ QDs (FA: formamidium), exhibit advantages like higher ambient stability, near-infrared absorption and sufficient carrier lifetime. However, hybrid QDs suffer from difficulty in modulating surface ligand, which is essential for constructing conductive QD arrays for photovoltaics. Herein, assisted by an ionic liquid formamidine thiocyanate, we report a facile surface reconfiguration methodology to modulate surface and manipulate electronic coupling of FAPbI₃ QDs, which is exploited to enhance charge transport for fabricating high-quality QD arrays and photovoltaic devices. Finally, a record-high efficiency approaching 15% is achieved for FAPbI₃ QD solar cells, and they retain over 80% of the initial efficiency after aging in ambient environment (20-30% humidity, 25 ℃) for over 600 h.

影响因子：

15.336

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/ange.202214241