题目： | Ligand-Assisted Coupling Manipulation for Efficient and Stable FAPbI3 Colloidal Quantum Dot Solar Cells |
作者： | Xuliang Zhang1,2, Hehe Huang1,2, Lujie Jin1,3, Chao Wen1, Qian Zhao4, Chenyu Zhao1,3, Junjun Guo1,2, Chen Cheng1,3, Hongshuai Wang1,3, Liang Zhang1,2, Youyong Li1,3, Yin Maung Maung5, Jianyu Yuan, 1,2* Wanli Ma1,3* |
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 |
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责任编辑：郭佳