Direct and stable α-phase formation via ionic liquid solvation for formamidinium-based perovskite solar cells
文献类型：期刊论文
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| 作者 | Chao, Lingfeng,; Xia, Yingdong; Duan, Xiaozheng; Wang, Yue ; Ran, Chenxin; Niu, Tingting; Gu, Lei; Li, Deli; Hu, Jianfei; Gao, Xingyu
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| 刊名 | Joule
 ; Joule
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| 出版日期 | 2022 ; 2022 |
| 卷号 | 6期号:9页码:2203-2217 |
| DOI | 10.1016/j.joule.2022.07.008 ; 10.1016/j.joule.2022.07.008 |
| 文献子类 | Article ; Article |
| 英文摘要 | Direct and stable α-phase formation of formamidinium lead triiodide (FAPbI3) perovskite serves as an indispensable prerequisite for constructing stable and efficient perovskite solar cells. However, the α-phase formation is highly limited by molecular additives. Here, we report a strategy for directly fabricating stable α-phase of FAPbI3 perovskite by controlling the precursor solution on the molecular level using methylammonium acetate (MAAc) ionic liquid. We found that a strong interaction between Ac− and Pb2+ via C=O···Pb chelation enables the relaxation of Pb–I bonds and thus allows the effective insertion of formamidinium iodide (FAI) into soft Pb–I framework. Molecular dynamics simulations also show that the precursor solution has undergone an exchange of coordination between I− and Ac− to provide the reaction sites for FAI. With a one-step, antisolvent-treatment-free, and air-processing approach regardless of humidity, the corresponding photovoltaic cell exhibits an efficiency close to 24% along with long operational stability over 1,000 h. © 2022 Elsevier Inc.; Direct and stable α-phase formation of formamidinium lead triiodide (FAPbI3) perovskite serves as an indispensable prerequisite for constructing stable and efficient perovskite solar cells. However, the α-phase formation is highly limited by molecular additives. Here, we report a strategy for directly fabricating stable α-phase of FAPbI3 perovskite by controlling the precursor solution on the molecular level using methylammonium acetate (MAAc) ionic liquid. We found that a strong interaction between Ac− and Pb2+ via C=O···Pb chelation enables the relaxation of Pb–I bonds and thus allows the effective insertion of formamidinium iodide (FAI) into soft Pb–I framework. Molecular dynamics simulations also show that the precursor solution has undergone an exchange of coordination between I− and Ac− to provide the reaction sites for FAI. With a one-step, antisolvent-treatment-free, and air-processing approach regardless of humidity, the corresponding photovoltaic cell exhibits an efficiency close to 24% along with long operational stability over 1,000 h. © 2022 Elsevier Inc. |
| 电子版国际标准刊号 | 25424351 ; 25424351 |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299589]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Chao, Lingfeng,,Xia, Yingdong,Duan, Xiaozheng,et al. Direct and stable α-phase formation via ionic liquid solvation for formamidinium-based perovskite solar cells, Direct and stable α-phase formation via ionic liquid solvation for formamidinium-based perovskite solar cells[J]. Joule, Joule,2022, 2022,6, 6(9):2203-2217, 2203-2217. |
| APA | Chao, Lingfeng,.,Xia, Yingdong.,Duan, Xiaozheng.,Wang, Yue.,Ran, Chenxin.,...&Chen, Yonghua.(2022).Direct and stable α-phase formation via ionic liquid solvation for formamidinium-based perovskite solar cells.Joule,6(9),2203-2217. |
| MLA | Chao, Lingfeng,,et al."Direct and stable α-phase formation via ionic liquid solvation for formamidinium-based perovskite solar cells".Joule 6.9(2022):2203-2217. |
入库方式： OAI收割
来源：高能物理研究所
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