Engineering long-term stability into perovskite solar cells via application of a multi-functional TFSI-based ionic liquid

被引:37
|
作者
Gao, Xiao-Xin [1 ,2 ,3 ]
Ding, Bin [1 ]
Kanda, Hiroyuki [1 ]
Fei, Zhaofu [1 ]
Luo, Wen [1 ,4 ]
Zhang, Yi [1 ]
Shibayama, Naoyuki [5 ]
Zuttel, Andreas [1 ]
Tirani, Farzaneh Fadaei [1 ]
Scopelliti, Rosario [1 ]
Kinge, Sachin [6 ]
Zhang, Bao [2 ]
Feng, Yaqing [2 ,3 ]
Dyson, Paul J. [1 ]
Nazeeruddin, Mohammad Khaja [1 ]
机构
[1] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
[2] Tianjin Univ, Sch Chem Engn & Technol, 135 Yaguan Rd, Tianjin 300350, Peoples R China
[3] Tianjin Univ, Tianjin Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China
[4] Swiss Fed Labs Mat Sci & Technol EMPA, CH-8600 Dubendorf, Switzerland
[5] Univ Tokyo, Grad Sch Arts & Sci, Dept Gen Syst Studies, Meguro Ku, 3-8-1 Komaba, Tokyo 1538902, Japan
[6] Toyota Motor Co Ltd, Toyota Motor Tech Ctr, Adv Technol Div, Hoge Wei 33, B-1930 Zaventem, Belgium
来源
CELL REPORTS PHYSICAL SCIENCE | 2021年 / 2卷 / 07期
基金
中国国家自然科学基金; 瑞士国家科学基金会;
关键词
CRYSTAL-STRUCTURES; HYDROGEN-BOND; EFFICIENT; COORDINATION; PASSIVATION; ENERGETICS; ANION; LEAD; SALT;
D O I
10.1016/j.xcrp.2021.100475
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Organic-inorganic metal-halide perovskite solar cells (PSCs) have achieved a certified power-conversion efficiency (PCE) of 25.5%. However, long-term stability and air stability of the PSCs are still major concerns and hamper commercialization. Herein, we employ a multi-functional ionic liquid (IL), 1,3-bis(cyanomethyl)imidazolium bis(trifluoromethylsulfonyl)imide ([Bcim][TFSI]), which contains an imidazolium cation functionalized with nitrile (CN) groups and the TFSI anion and is, additionally, able to form an extensive network of low-barrier H bonds, as an additive in perovskite-precursor solutions. Because of a combination of the Lewis-basic CN groups and the hydrophobic TFSI anion in the IL, highly crystalline perovskite films with large grain sizes are obtained. The IL-modified perovskite films afford PSCs with long-term stability and PCEs > 21%. The stability of unencapsulated devices retain >95% of their original efficiency after 1,000 h of aging. This study demonstrates the considerable potential of TFSI-based ILs to improve the performance of PSCs.
引用
收藏
页数:16
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