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

Shunlin Zhang; Tianyu Xiao; Farzaneh Fadaei Tirani; Rosario Scopelliti; Mohammad Khaja Nazeeruddin; Dunru Zhu; Paul J. Dyson; Zhaofu Fei

doi:10.1021/acs.inorgchem.1c03862

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

Shunlin Zhang, Tianyu Xiao, Farzaneh Fadaei Tirani, Rosario Scopelliti, Mohammad Khaja Nazeeruddin, Dunru Zhu, Paul J. Dyson, Zhaofu Fei

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Passivation of perovskite films by ionic liquids (ILs) improves the performance (efficiency and stability) of perovskite solar cells (PSCs). However, the role of ILs in the passivation of perovskite films is not fully understood. Here, we report the reactions of commonly used ILs with the components of perovskites. The reaction of ILs with perovskite precursors (PbI₂and methylammonium iodide or formamidinium iodide) in a 1:1:1 molar ratio affords one-dimensional (1D) salts composed of the IL cation interspersed along infinite 1D polymeric [PbI₃]^-_nchains. If the IL is applied in excess, the resulting crystal is composed of six cations 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.

Original language	English
Pages (from-to)	5010-5016
Number of pages	7
Journal	Inorganic Chemistry
Volume	61
Issue number	12
DOIs	https://doi.org/10.1021/acs.inorgchem.1c03862
State	Published - 28 Mar 2022

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title = "The Chemistry of the Passivation Mechanism of Perovskite Films with Ionic Liquids",

abstract = "Passivation of perovskite films by ionic liquids (ILs) improves the performance (efficiency and stability) of perovskite solar cells (PSCs). However, the role of ILs in the passivation of perovskite films is not fully understood. Here, we report the reactions of commonly used ILs with the components of perovskites. The reaction of ILs with perovskite precursors (PbI2and methylammonium iodide or formamidinium iodide) in a 1:1:1 molar ratio affords one-dimensional (1D) salts composed of the IL cation interspersed along infinite 1D polymeric [PbI3]-nchains. If the IL is applied in excess, the resulting crystal is composed of six cations 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.",

author = "Shunlin Zhang and Tianyu Xiao and {Fadaei Tirani}, Farzaneh and Rosario Scopelliti and Nazeeruddin, {Mohammad Khaja} and Dunru Zhu and Dyson, {Paul J.} and Zhaofu Fei",

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doi = "10.1021/acs.inorgchem.1c03862",

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T1 - The Chemistry of the Passivation Mechanism of Perovskite Films with Ionic Liquids

AU - Zhang, Shunlin

AU - Xiao, Tianyu

AU - Fadaei Tirani, Farzaneh

AU - Scopelliti, Rosario

AU - Nazeeruddin, Mohammad Khaja

AU - Zhu, Dunru

AU - Dyson, Paul J.

AU - Fei, Zhaofu

PY - 2022/3/28

Y1 - 2022/3/28

N2 - Passivation of perovskite films by ionic liquids (ILs) improves the performance (efficiency and stability) of perovskite solar cells (PSCs). However, the role of ILs in the passivation of perovskite films is not fully understood. Here, we report the reactions of commonly used ILs with the components of perovskites. The reaction of ILs with perovskite precursors (PbI2and methylammonium iodide or formamidinium iodide) in a 1:1:1 molar ratio affords one-dimensional (1D) salts composed of the IL cation interspersed along infinite 1D polymeric [PbI3]-nchains. If the IL is applied in excess, the resulting crystal is composed of six cations 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.

AB - Passivation of perovskite films by ionic liquids (ILs) improves the performance (efficiency and stability) of perovskite solar cells (PSCs). However, the role of ILs in the passivation of perovskite films is not fully understood. Here, we report the reactions of commonly used ILs with the components of perovskites. The reaction of ILs with perovskite precursors (PbI2and methylammonium iodide or formamidinium iodide) in a 1:1:1 molar ratio affords one-dimensional (1D) salts composed of the IL cation interspersed along infinite 1D polymeric [PbI3]-nchains. If the IL is applied in excess, the resulting crystal is composed of six cations 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.

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JO - Inorganic Chemistry

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IS - 12

ER -

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

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