The Saga of Water and Halide Perovskites: Evidence of Water in Methylammonium Lead Tri-Iodide

Naga Prathibha Jasti; Gennady E. Shter; Yishay Feldman; Davide Raffaele Ceratti; Adi Kama; Isaac Buchine; Gideon S. Grader; David Cahen

doi:10.1002/adfm.202204283

The Saga of Water and Halide Perovskites: Evidence of Water in Methylammonium Lead Tri-Iodide

Naga Prathibha Jasti, Gennady E. Shter, Yishay Feldman, Davide Raffaele Ceratti, Adi Kama, Isaac Buchine, Gideon S. Grader, David Cahen

Department of Chemistry

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

7 Scopus citations

Abstract

The environment humidity effects on performance of halide perovskites (HaPs), especially MAPbI₃, are known. Nevertheless, it is hard to find direct experimental evidence of H₂O in the bulk materials at the levels lower than that of Monohydrate (MAPbI₃.H₂O). Here, for the first time, direct experimental evidence of water being released from bulk (µm-s deep) of MAPbI₃ single crystal is reported. The thermogravimetric analysis coupled with mass spectrometry (TGA-MS) of evolved gases is used to detect the MS signal of H₂O from the penetrable depth and correlate it with the TGA mass loss due to H₂O leaving the material. These measurements yield an estimate of the average H₂O content of 1 H₂O molecule per three MAPbI₃ formula units (MAPbI₃.0.33H₂O). Under the relatively low temperature conditions no other evolved gases that can correspond to MAPbI₃ decomposition products, are observed in the MS. In addition to being direct evidence that there is H₂O inside MAPbI₃, the data show that H₂O diffuses into it. With this article, a solid basis is proved for further studies on the mechanisms through which water modifies the properties of MAPbI₃ and all the other halide perovskites.

Original language	English
Article number	2204283
Journal	Advanced Functional Materials
Volume	32
Issue number	43
DOIs	https://doi.org/10.1002/adfm.202204283
State	Published - 21 Oct 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.

Funding

NPJ thanks Dr. Shay Tirosh for technical support and guidance. N.P.J. and D.C. thank Reut Cohen, Michal Weitman for earlier work on this problem at Bar Ilan University, and Drs. Irit Goldian and Sidney Cohen (Weizmann Institute of Science) for the AFM measurements. The authors thank the reviewers for their constructive comments. NPJ acknowledges funding from the European Union's Horizon 2020 MSCA Innovative Training Network MAESTRO under grant agreement no. 764787. Additional support was obtained from the Nancy and Stephen Grand Technion Energy Program (GTEP). G.S.G. acknowledges the support of the Arturo Gruenebaum Chair in Materials Engineering. At Bar-Ilan University work was supported by the Israel Ministry of Energy as part of the Solar ERAnet PerDry consortium and at the Weizmann Institute of Science by the Minerva Centre for Self-Repairing Systems for Energy & Sustainability, and the CNRS-Weizmann program. NPJ thanks Dr. Shay Tirosh for technical support and guidance. N.P.J. and D.C. thank Reut Cohen, Michal Weitman for earlier work on this problem at Bar Ilan University, and Drs. Irit Goldian and Sidney Cohen (Weizmann Institute of Science) for the AFM measurements. The authors thank the reviewers for their constructive comments. NPJ acknowledges funding from the European Union's Horizon 2020 MSCA Innovative Training Network MAESTRO under grant agreement no. 764787. Additional support was obtained from the Nancy and Stephen Grand Technion Energy Program (GTEP). G.S.G. acknowledges the support of the Arturo Gruenebaum Chair in Materials Engineering. At Bar‐Ilan University work was supported by the Israel Ministry of Energy as part of the Solar ERAnet PerDry consortium and at the Weizmann Institute of Science by the Minerva Centre for Self‐Repairing Systems for Energy & Sustainability, and the CNRS‐Weizmann program.

Funders	Funder number
European Union's Horizon 2020 MSCA	764787
Minerva Centre for Self-Repairing Systems for Energy & Sustainability
Minerva Centre for Self‐Repairing Systems for Energy & Sustainability
Weizmann Institute of Science
Bar-Ilan University
Ministry of Energy, Israel

Keywords

MAPbI
humidity
monohydrate
single crystal quality

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10.1002/adfm.202204283

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title = "The Saga of Water and Halide Perovskites: Evidence of Water in Methylammonium Lead Tri-Iodide",

abstract = "The environment humidity effects on performance of halide perovskites (HaPs), especially MAPbI3, are known. Nevertheless, it is hard to find direct experimental evidence of H2O in the bulk materials at the levels lower than that of Monohydrate (MAPbI3.H2O). Here, for the first time, direct experimental evidence of water being released from bulk (µm-s deep) of MAPbI3 single crystal is reported. The thermogravimetric analysis coupled with mass spectrometry (TGA-MS) of evolved gases is used to detect the MS signal of H2O from the penetrable depth and correlate it with the TGA mass loss due to H2O leaving the material. These measurements yield an estimate of the average H2O content of 1 H2O molecule per three MAPbI3 formula units (MAPbI3.0.33H2O). Under the relatively low temperature conditions no other evolved gases that can correspond to MAPbI3 decomposition products, are observed in the MS. In addition to being direct evidence that there is H2O inside MAPbI3, the data show that H2O diffuses into it. With this article, a solid basis is proved for further studies on the mechanisms through which water modifies the properties of MAPbI3 and all the other halide perovskites.",

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AU - Shter, Gennady E.

AU - Feldman, Yishay

AU - Ceratti, Davide Raffaele

AU - Kama, Adi

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AU - Cahen, David

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AB - The environment humidity effects on performance of halide perovskites (HaPs), especially MAPbI3, are known. Nevertheless, it is hard to find direct experimental evidence of H2O in the bulk materials at the levels lower than that of Monohydrate (MAPbI3.H2O). Here, for the first time, direct experimental evidence of water being released from bulk (µm-s deep) of MAPbI3 single crystal is reported. The thermogravimetric analysis coupled with mass spectrometry (TGA-MS) of evolved gases is used to detect the MS signal of H2O from the penetrable depth and correlate it with the TGA mass loss due to H2O leaving the material. These measurements yield an estimate of the average H2O content of 1 H2O molecule per three MAPbI3 formula units (MAPbI3.0.33H2O). Under the relatively low temperature conditions no other evolved gases that can correspond to MAPbI3 decomposition products, are observed in the MS. In addition to being direct evidence that there is H2O inside MAPbI3, the data show that H2O diffuses into it. With this article, a solid basis is proved for further studies on the mechanisms through which water modifies the properties of MAPbI3 and all the other halide perovskites.

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The Saga of Water and Halide Perovskites: Evidence of Water in Methylammonium Lead Tri-Iodide

Abstract

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