2D Pb-Halide Perovskites Can Self-Heal Photodamage Better than 3D Ones

Sigalit Aharon; Davide Raffaele Ceratti; Naga Prathibha Jasti; Llorenç Cremonesi; Yishay Feldman; Marco Alberto Carlo Potenza; Gary Hodes; David Cahen

doi:10.1002/adfm.202113354

2D Pb-Halide Perovskites Can Self-Heal Photodamage Better than 3D Ones

Sigalit Aharon, Davide Raffaele Ceratti, Naga Prathibha Jasti, Llorenç Cremonesi, Yishay Feldman, Marco Alberto Carlo Potenza, Gary Hodes, David Cahen

Department of Chemistry

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

16 Scopus citations

Abstract

Adding a 2D character to halide perovskite (HaP) active layers in ambient-protected cells can improve their stability drastically, which is not obvious from the hydrophobicity of the large cations that force the HaP into a 2D structure. Results of two-photon confocal microscopy are reported to study inherent photo-stability of 2D Pb iodide HaPs in the interior of single crystals. Compared to 3D HaP crystals, 2D ones have higher photo-stability and, under a few sun-equivalent conditions, self-heal efficiently after photo-damage. Using both photoluminescence (PL) intensities (as function of time after photo-damage) and spectra, self-healing dynamics of 2D HaP (C₄H₉NH₃)₂PbI₄, 2D/3D (C₄H₉NH₃)₂(CH₃NH₃)₂Pb₃I₁₀ and 3D MAPbI₃ are compared. Differences in response to photo-damage and self-healing ability from different degrees of photo-damage are found between these HaPs. Based on the findings, a possible chemical mechanism for photo-damage and self-healing of the 2D HaPs is suggested: the layered lattice arrangement limits out-diffusion of degradation products, facilitating damage reversal, leading to better 2D HaP photo-stability and self-healing uniformity than for 2D/3D HaPs. One implication of the layered structures’ resilience to photo-damage is transfer of their increased stability to devices made with them, such as photovoltaic solar cells and light-emitting diodes.

Original language	English
Article number	2113354
Journal	Advanced Functional Materials
Volume	32
Issue number	24
DOIs	https://doi.org/10.1002/adfm.202113354
State	Published - 10 Jun 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Funding

S.A. thanks the Weizmann Institute for a dean's postdoctoral fellowship, and Dr. Omer Yaffe for hospitality and guidance. N.P.J. acknowledges funding from the European Union's Horizon 2020 MSCA Innovative Training Network under grant agreement no. 764787 (MAESTRO). D.C. thanks the Yotam project (via the Sustainability and Energy Research Initiative, SAERI, of the Weizmann Institute), the CNRS-Weizmann program and the Minerva Centre for Self-Repairing Systems for Energy & Sustainability, for support. S.A. thanks the Weizmann Institute for a dean's postdoctoral fellowship, and Dr. Omer Yaffe for hospitality and guidance. N.P.J. acknowledges funding from the European Union's Horizon 2020 MSCA Innovative Training Network under grant agreement no. 764787 (MAESTRO). D.C. thanks the Yotam project (via the Sustainability and Energy Research Initiative, SAERI, of the Weizmann Institute), the CNRS‐Weizmann program and the Minerva Centre for Self‐Repairing Systems for Energy & Sustainability, for support.

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
SAERI
Sustainability and Energy Research Initiative

Keywords

2D
crystals
damage
halide perovskites
photoluminescence
self-healing
stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/adfm.202113354

Cite this

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title = "2D Pb-Halide Perovskites Can Self-Heal Photodamage Better than 3D Ones",

abstract = "Adding a 2D character to halide perovskite (HaP) active layers in ambient-protected cells can improve their stability drastically, which is not obvious from the hydrophobicity of the large cations that force the HaP into a 2D structure. Results of two-photon confocal microscopy are reported to study inherent photo-stability of 2D Pb iodide HaPs in the interior of single crystals. Compared to 3D HaP crystals, 2D ones have higher photo-stability and, under a few sun-equivalent conditions, self-heal efficiently after photo-damage. Using both photoluminescence (PL) intensities (as function of time after photo-damage) and spectra, self-healing dynamics of 2D HaP (C4H9NH3)2PbI4, 2D/3D (C4H9NH3)2(CH3NH3)2Pb3I10 and 3D MAPbI3 are compared. Differences in response to photo-damage and self-healing ability from different degrees of photo-damage are found between these HaPs. Based on the findings, a possible chemical mechanism for photo-damage and self-healing of the 2D HaPs is suggested: the layered lattice arrangement limits out-diffusion of degradation products, facilitating damage reversal, leading to better 2D HaP photo-stability and self-healing uniformity than for 2D/3D HaPs. One implication of the layered structures{\textquoteright} resilience to photo-damage is transfer of their increased stability to devices made with them, such as photovoltaic solar cells and light-emitting diodes.",

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year = "2022",

month = jun,

day = "10",

doi = "10.1002/adfm.202113354",

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AU - Aharon, Sigalit

AU - Ceratti, Davide Raffaele

AU - Jasti, Naga Prathibha

AU - Cremonesi, Llorenç

AU - Feldman, Yishay

AU - Potenza, Marco Alberto Carlo

AU - Hodes, Gary

AU - Cahen, David

PY - 2022/6/10

Y1 - 2022/6/10

N2 - Adding a 2D character to halide perovskite (HaP) active layers in ambient-protected cells can improve their stability drastically, which is not obvious from the hydrophobicity of the large cations that force the HaP into a 2D structure. Results of two-photon confocal microscopy are reported to study inherent photo-stability of 2D Pb iodide HaPs in the interior of single crystals. Compared to 3D HaP crystals, 2D ones have higher photo-stability and, under a few sun-equivalent conditions, self-heal efficiently after photo-damage. Using both photoluminescence (PL) intensities (as function of time after photo-damage) and spectra, self-healing dynamics of 2D HaP (C4H9NH3)2PbI4, 2D/3D (C4H9NH3)2(CH3NH3)2Pb3I10 and 3D MAPbI3 are compared. Differences in response to photo-damage and self-healing ability from different degrees of photo-damage are found between these HaPs. Based on the findings, a possible chemical mechanism for photo-damage and self-healing of the 2D HaPs is suggested: the layered lattice arrangement limits out-diffusion of degradation products, facilitating damage reversal, leading to better 2D HaP photo-stability and self-healing uniformity than for 2D/3D HaPs. One implication of the layered structures’ resilience to photo-damage is transfer of their increased stability to devices made with them, such as photovoltaic solar cells and light-emitting diodes.

AB - Adding a 2D character to halide perovskite (HaP) active layers in ambient-protected cells can improve their stability drastically, which is not obvious from the hydrophobicity of the large cations that force the HaP into a 2D structure. Results of two-photon confocal microscopy are reported to study inherent photo-stability of 2D Pb iodide HaPs in the interior of single crystals. Compared to 3D HaP crystals, 2D ones have higher photo-stability and, under a few sun-equivalent conditions, self-heal efficiently after photo-damage. Using both photoluminescence (PL) intensities (as function of time after photo-damage) and spectra, self-healing dynamics of 2D HaP (C4H9NH3)2PbI4, 2D/3D (C4H9NH3)2(CH3NH3)2Pb3I10 and 3D MAPbI3 are compared. Differences in response to photo-damage and self-healing ability from different degrees of photo-damage are found between these HaPs. Based on the findings, a possible chemical mechanism for photo-damage and self-healing of the 2D HaPs is suggested: the layered lattice arrangement limits out-diffusion of degradation products, facilitating damage reversal, leading to better 2D HaP photo-stability and self-healing uniformity than for 2D/3D HaPs. One implication of the layered structures’ resilience to photo-damage is transfer of their increased stability to devices made with them, such as photovoltaic solar cells and light-emitting diodes.

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KW - damage

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ER -

2D Pb-Halide Perovskites Can Self-Heal Photodamage Better than 3D Ones

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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