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Ligand-Assisted Coupling Manipulation for Efficient and Stable FAPbI3 Colloidal Quantum Dot Solar Cells |
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| Authors: | Xuliang Zhang Hehe Huang Lujie Jin Chao Wen Qian Zhao Chenyu Zhao Junjun Guo Chen Cheng Hongshuai Wang Prof Liang Zhang Prof Youyong Li Prof Yin Maung Maung Prof Jianyu Yuan Prof Wanli Ma |
| Institution: | 1. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China
Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu P. R. China Contribution: Conceptualization (equal), Data curation (lead), ?Investigation (lead), Writing - original draft (lead);2. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu P. R. China Contribution: Data curation (equal), Formal analysis (supporting), ?Investigation (equal), Methodology (supporting), Writing - original draft (supporting);3. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123 P. R. China Contribution: Data curation (supporting), Formal analysis (supporting), ?Investigation (supporting), Methodology (supporting), Writing - review & editing (supporting);4. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Contribution: ?Investigation (supporting), Methodology (supporting), Writing - original draft (supporting);5. School of Materials Science and Engineering, Nankai University, Tianjin, 300350 P. R. China Contribution: Conceptualization (supporting), Supervision (supporting), Writing - review & editing (supporting);6. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123 P. R. China Contribution: Data curation (supporting), ?Investigation (supporting);7. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu P. R. China Contribution: Formal analysis (supporting), ?Investigation (supporting);8. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123 P. R. China Contribution: Data curation (supporting);9. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123 P. R. China Contribution: Supervision (supporting);10. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu P. R. China Contribution: Resources (supporting), Supervision (supporting);11. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123 P. R. China Contribution: Resources (supporting), Supervision (supporting);12. Department of Physics, University of Yangon, Pyay Road, Yangon, 11181 Myanmar Contribution: Funding acquisition (supporting), Resources (supporting), Writing - review & editing (supporting);13. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123 P. R. China |
| Abstract: | 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 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 °C) for over 600 h. |
| Keywords: | Electronic Coupling FAPbI3 Ligand Perovskite Quantum Dot Solar Cells |