General Decomposition Pathway of Organic–Inorganic Hybrid Perovskites through an Intermediate Superstructure and its Suppression Mechanism

Shulin Chen; Ying Zhang; Xiaowei Zhang; Jinjin Zhao; Zewen Zhao; Xiao Su; Ze Hua; Jingmin Zhang; Jian Cao; Jicai Feng; Xiao Wang; Xinzheng Li; Junlei Qi; Jiangyu Li; Peng Gao

doi:10.1002/adma.202001107

General Decomposition Pathway of Organic–Inorganic Hybrid Perovskites through an Intermediate Superstructure and its Suppression Mechanism

Shulin Chen
, Ying Zhang
, Xiaowei Zhang
, Jinjin Zhao^*
, Zewen Zhao
, Xiao Su
, Ze Hua
, Jingmin Zhang
, Jian Cao
, Jicai Feng
, Xiao Wang
, Xinzheng Li
, Junlei Qi^*
, Jiangyu Li^*
, Peng Gao^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Peking University
Shijiazhuang Tiedao University
Shenzhen Institute of Advanced Technology
Collaborative Innovation Center of Quantum Matter

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

71 Scopus citations

Abstract

Organic–inorganic hybrid perovskites (OIHPs) have generated considerable excitement due to their promising photovoltaic performance. However, the commercialization of perovskite solar cells (PSCs) is still plagued by the structural degradation of the OIHPs. Here, the decomposition mechanism of OIHPs under electron beam irradiation is investigated via transmission electron microscopy, and a general decomposition pathway for both tetragonal CH₃NH₃PbI₃ and cubic CH₃NH₃PbBr₃ is uncovered through an intermediate superstructure state of CH₃NH₃PbX_2.5, X = I, Br, with ordered vacancies into final lead halides. Such decomposition can be suppressed via carbon coating by stabilization of the perovskite structure framework. These findings reveal the general degradation pathway of OIHPs and suggest an effective strategy to suppress it, and the atomistic insight learnt may be useful for improving the stability of PSCs.

Original language	English
Article number	2001107
Journal	Advanced Materials
Volume	32
Issue number	29
DOIs	https://doi.org/10.1002/adma.202001107
State	Published - 1 Jul 2020

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SDG 7 Affordable and Clean Energy

Keywords

coatings
decomposition pathways
intermediate superstructures
organic–inorganic hybrid perovskites
suppression of degradation

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10.1002/adma.202001107

Cite this

Chen, S., Zhang, Y., Zhang, X., Zhao, J., Zhao, Z., Su, X., Hua, Z., Zhang, J., Cao, J., Feng, J., Wang, X., Li, X., Qi, J., Li, J., & Gao, P. (2020). General Decomposition Pathway of Organic–Inorganic Hybrid Perovskites through an Intermediate Superstructure and its Suppression Mechanism. Advanced Materials, 32(29), Article 2001107. https://doi.org/10.1002/adma.202001107

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title = "General Decomposition Pathway of Organic{\textendash}Inorganic Hybrid Perovskites through an Intermediate Superstructure and its Suppression Mechanism",

abstract = "Organic{\textendash}inorganic hybrid perovskites (OIHPs) have generated considerable excitement due to their promising photovoltaic performance. However, the commercialization of perovskite solar cells (PSCs) is still plagued by the structural degradation of the OIHPs. Here, the decomposition mechanism of OIHPs under electron beam irradiation is investigated via transmission electron microscopy, and a general decomposition pathway for both tetragonal CH3NH3PbI3 and cubic CH3NH3PbBr3 is uncovered through an intermediate superstructure state of CH3NH3PbX2.5, X = I, Br, with ordered vacancies into final lead halides. Such decomposition can be suppressed via carbon coating by stabilization of the perovskite structure framework. These findings reveal the general degradation pathway of OIHPs and suggest an effective strategy to suppress it, and the atomistic insight learnt may be useful for improving the stability of PSCs.",

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author = "Shulin Chen and Ying Zhang and Xiaowei Zhang and Jinjin Zhao and Zewen Zhao and Xiao Su and Ze Hua and Jingmin Zhang and Jian Cao and Jicai Feng and Xiao Wang and Xinzheng Li and Junlei Qi and Jiangyu Li and Peng Gao",

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doi = "10.1002/adma.202001107",

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AU - Chen, Shulin

AU - Zhang, Ying

AU - Zhang, Xiaowei

AU - Zhao, Jinjin

AU - Zhao, Zewen

AU - Su, Xiao

AU - Hua, Ze

AU - Zhang, Jingmin

AU - Cao, Jian

AU - Feng, Jicai

AU - Wang, Xiao

AU - Li, Xinzheng

AU - Qi, Junlei

AU - Li, Jiangyu

AU - Gao, Peng

PY - 2020/7/1

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N2 - Organic–inorganic hybrid perovskites (OIHPs) have generated considerable excitement due to their promising photovoltaic performance. However, the commercialization of perovskite solar cells (PSCs) is still plagued by the structural degradation of the OIHPs. Here, the decomposition mechanism of OIHPs under electron beam irradiation is investigated via transmission electron microscopy, and a general decomposition pathway for both tetragonal CH3NH3PbI3 and cubic CH3NH3PbBr3 is uncovered through an intermediate superstructure state of CH3NH3PbX2.5, X = I, Br, with ordered vacancies into final lead halides. Such decomposition can be suppressed via carbon coating by stabilization of the perovskite structure framework. These findings reveal the general degradation pathway of OIHPs and suggest an effective strategy to suppress it, and the atomistic insight learnt may be useful for improving the stability of PSCs.

AB - Organic–inorganic hybrid perovskites (OIHPs) have generated considerable excitement due to their promising photovoltaic performance. However, the commercialization of perovskite solar cells (PSCs) is still plagued by the structural degradation of the OIHPs. Here, the decomposition mechanism of OIHPs under electron beam irradiation is investigated via transmission electron microscopy, and a general decomposition pathway for both tetragonal CH3NH3PbI3 and cubic CH3NH3PbBr3 is uncovered through an intermediate superstructure state of CH3NH3PbX2.5, X = I, Br, with ordered vacancies into final lead halides. Such decomposition can be suppressed via carbon coating by stabilization of the perovskite structure framework. These findings reveal the general degradation pathway of OIHPs and suggest an effective strategy to suppress it, and the atomistic insight learnt may be useful for improving the stability of PSCs.

KW - coatings

KW - decomposition pathways

KW - intermediate superstructures

KW - organic–inorganic hybrid perovskites

KW - suppression of degradation

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U2 - 10.1002/adma.202001107

DO - 10.1002/adma.202001107

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SN - 0935-9648

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JO - Advanced Materials

JF - Advanced Materials

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ER -

General Decomposition Pathway of Organic–Inorganic Hybrid Perovskites through an Intermediate Superstructure and its Suppression Mechanism

Abstract

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Keywords

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