Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage
Abstract The photoluminescence (PL) of metal halide perovskites can recover after light or current‐induced degradation. This self‐healing ability is tested by acting mechanically on MAPbI3 polycrystalline microcrystals by an atomic force microscope tip (applying force, scratching, and cutting) while...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202204393 |
| _version_ | 1797962120949661696 |
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| author | Marco H. J. J. Galle Jun Li Pavel A. Frantsuzov Thomas Basché Ivan G. Scheblykin |
| author_facet | Marco H. J. J. Galle Jun Li Pavel A. Frantsuzov Thomas Basché Ivan G. Scheblykin |
| author_sort | Marco H. J. J. Galle |
| collection | DOAJ |
| description | Abstract The photoluminescence (PL) of metal halide perovskites can recover after light or current‐induced degradation. This self‐healing ability is tested by acting mechanically on MAPbI3 polycrystalline microcrystals by an atomic force microscope tip (applying force, scratching, and cutting) while monitoring the PL. Although strain and crystal damage induce strong PL quenching, the initial balance between radiative and nonradiative processes in the microcrystals is restored within a few minutes. The stepwise quenching–recovery cycles induced by the mechanical action is interpreted as a modulation of the PL blinking behavior. This study proposes that the dynamic equilibrium between active and inactive states of the metastable nonradiative recombination centers causing blinking is perturbed by strain. Reversible stochastic transformation of several nonradiative centers per microcrystal under application/release of the local stress can lead to the observed PL quenching and recovery. Fitting the experimental PL trajectories by a phenomenological model based on viscoelasticity provides a characteristic time of strain relaxation in MAPbI3 on the order of 10–100 s. The key role of metastable defect states in nonradiative losses and in the self‐healing properties of perovskites is suggested. |
| first_indexed | 2024-04-11T01:08:18Z |
| format | Article |
| id | doaj.art-2a93d49f04e7408ebb878c95ec97a7aa |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-11T01:08:18Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-2a93d49f04e7408ebb878c95ec97a7aa2023-01-04T10:53:45ZengWileyAdvanced Science2198-38442023-01-01101n/an/a10.1002/advs.202204393Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical DamageMarco H. J. J. Galle0Jun Li1Pavel A. Frantsuzov2Thomas Basché3Ivan G. Scheblykin4Department of Chemistry Johannes Gutenberg‐University Duesbergweg 10‐14 55128 Mainz GermanyChemical Physics and NanoLund Lund University Box 124 Lund 22100 SwedenVoevodsky Institute of Chemical Kinetics and Combustion Siberian Branch of the Russian Academy of Science Institutskaya 3 Novosibirsk 630090 RussiaDepartment of Chemistry Johannes Gutenberg‐University Duesbergweg 10‐14 55128 Mainz GermanyChemical Physics and NanoLund Lund University Box 124 Lund 22100 SwedenAbstract The photoluminescence (PL) of metal halide perovskites can recover after light or current‐induced degradation. This self‐healing ability is tested by acting mechanically on MAPbI3 polycrystalline microcrystals by an atomic force microscope tip (applying force, scratching, and cutting) while monitoring the PL. Although strain and crystal damage induce strong PL quenching, the initial balance between radiative and nonradiative processes in the microcrystals is restored within a few minutes. The stepwise quenching–recovery cycles induced by the mechanical action is interpreted as a modulation of the PL blinking behavior. This study proposes that the dynamic equilibrium between active and inactive states of the metastable nonradiative recombination centers causing blinking is perturbed by strain. Reversible stochastic transformation of several nonradiative centers per microcrystal under application/release of the local stress can lead to the observed PL quenching and recovery. Fitting the experimental PL trajectories by a phenomenological model based on viscoelasticity provides a characteristic time of strain relaxation in MAPbI3 on the order of 10–100 s. The key role of metastable defect states in nonradiative losses and in the self‐healing properties of perovskites is suggested.https://doi.org/10.1002/advs.202204393defectsmetastabilityphotoluminescenceself‐healingstrain |
| spellingShingle | Marco H. J. J. Galle Jun Li Pavel A. Frantsuzov Thomas Basché Ivan G. Scheblykin Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage Advanced Science defects metastability photoluminescence self‐healing strain |
| title | Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage |
| title_full | Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage |
| title_fullStr | Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage |
| title_full_unstemmed | Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage |
| title_short | Self‐Healing Ability of Perovskites Observed via Photoluminescence Response on Nanoscale Local Forces and Mechanical Damage |
| title_sort | self healing ability of perovskites observed via photoluminescence response on nanoscale local forces and mechanical damage |
| topic | defects metastability photoluminescence self‐healing strain |
| url | https://doi.org/10.1002/advs.202204393 |
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