The Chemistry of the Passivation Mechanism of Perovskite Films with Ionic Liquids

被引：19
|
作者：
Zhang, Shunlin [1 ,2 ]
Xiao, Tianyu [1 ]
Tirani, Farzaneh Fadaei [2 ]
Scopelliti, Rosario [2 ]
Nazeeruddin, Mohammad Khaja [2 ]
Zhu, Dunru [1 ]
Dyson, Paul J. [2 ]
Fei, Zhaofu [2 ]
机构：
[1] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China
[2] Ecole Polytech Fed Lausanne EPFL, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland
来源：
INORGANIC CHEMISTRY | 2022年 / 61卷 / 12期
基金：
瑞士国家科学基金会; 中国国家自然科学基金;
关键词：
SOLAR-CELLS; LEAD IODIDE; ORGANIC CATIONS; ASSISTED GROWTH; STABILITY; CRYSTALLIZATION; CRYSTALS;
D O I：
10.1021/acs.inorgchem.1c03862
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Passivation of perovskite films by ionic liquids (ILs)improves the performance (efficiency and stability) of perovskitesolar cells (PSCs). However, the role of ILs in the passivation ofperovskitefilms is not fully understood. Here, we report thereactions of commonly used ILs with the components ofperovskites. The reaction of ILs with perovskite precursors (PbI2and methylammonium iodide or formamidinium iodide) in a 1:1:1molar ratio affords one-dimensional (1D) salts composed of the ILcation interspersed along infinite 1D polymeric [PbI3]-nchains. If the IL is applied in excess, the resulting crystal is composed of sixcations surrounding a discrete [Pb3I12]6-cluster. All the isolated salts were unambiguously characterized by single-crystal X-ray diffraction analysis, which also reveals extensive hydrogen-bonding interactions
引用
收藏
页码：5010 / 5016
页数：7
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