Response to Comment on “Eppur si Muove: Proton Diffusion in Halide Perovskite Single Crystals”: Measure What is Measurable, and Make Measurable What is Not So: Discrepancies between Proton Diffusion in Halide Perovskite Single Crystals and Thin Films

Davide Raffaele Ceratti, Arava Zohar, Gary Hodes, David Cahen

Research output: Contribution to journalLetterpeer-review

4 Scopus citations

Abstract

Buffeteau et al. note that the proton diffusion coefficient in MAPbI3 that is deduced (by the authors) from results, obtained by a suite of complementary techniques, on a large number of single crystals (Adv. Mater. 2020, 32, 2002467) is 5 orders of magnitude higher than what is estimated (by them) in J. Am. Chem. Soc. 2020, 142, 10431, from infrared spectroscopy on ultrathin MAPbI3 films; use of (deuterium/hydrogen) D/H isotope substitution is common to both studies. Buffeteau et al. speculated that proton diffusion in halide perovskite single crystals is dominated by 1D defects, which will somehow not be present in thin films, as those are made up of small-sized crystallites. It is shown here that the idea of a 1D defect is not supported by the body of experimental data gathered on these crystals, that the statistical analysis employed in to Buffeteau et al. to support the criticism is problematic, and it is concluded that the source of the difference must lie elsewhere. Constructive suggestions for this difference are provided and experiments to discern between possible reasons for it are proposed.

Original languageEnglish
Article number2102822
JournalAdvanced Materials
Volume33
Issue number35
DOIs
StatePublished - 2 Sep 2021

Bibliographical note

Publisher Copyright:
© 2021 Wiley-VCH GmbH

Funding

All the authors thank Sigalit Aharon for the help with the cutting of halide perovskite single crystals for SEM imaging; D.R.C. thanks Valeria Giovanna Nitti for helping with the philological research about Galileo's quote. This project received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 893194. A.Z., G.H., and D.C. thank the Yotam project, the Minerva Centre for Self-Repairing Systems for Energy & Sustainability, and the CNRS-Weizmann program for support. The figure in the table of contents image for this article is of one of the authors and appears with their consent. All the authors thank Sigalit Aharon for the help with the cutting of halide perovskite single crystals for SEM imaging; D.R.C. thanks Valeria Giovanna Nitti for helping with the philological research about Galileo's quote. This project received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska‐Curie grant agreement No. 893194. A.Z., G.H., and D.C. thank the Yotam project, the Minerva Centre for Self‐Repairing Systems for Energy & Sustainability, and the CNRS‐Weizmann program for support. The figure in the table of contents image for this article is of one of the authors and appears with their consent.

FundersFunder number
Minerva Centre for Self-Repairing Systems for Energy & Sustainability
Minerva Centre for Self‐Repairing Systems for Energy & Sustainability
Horizon 2020 Framework Programme893194
H2020 Marie Skłodowska-Curie Actions
Horizon 2020

    Keywords

    • deuteration
    • halide perovskites
    • ion diffusion
    • proton diffusion

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