Abstract
Self-healing, where a modification in some parameter is reversed with time without any external intervention, is one of the particularly interesting properties of halide perovskites. While there are a number of studies showing such self-healing in perovskites, they all are carried out on thin films, where the interface between the perovskite and another phase (including the ambient) is often a dominating and interfering factor in the process. Here, self-healing in perovskite (methylammonium, formamidinium, and cesium lead bromide (MAPbBr3, FAPbBr3, and CsPbBr3)) single crystals is reported, using two-photon microscopy to create damage (photobleaching) ≈110 µm inside the crystals and to monitor the recovery of photoluminescence after the damage. Self-healing occurs in all three perovskites with FAPbBr3 the fastest (≈1 h) and CsPbBr3 the slowest (tens of hours) to recover. This behavior, different from surface-dominated stability trends, is typical of the bulk and is strongly dependent on the localization of degradation products not far from the site of the damage. The mechanism of self-healing is discussed with the possible participation of polybromide species. It provides a closed chemical cycle and does not necessarily involve defect or ion migration phenomena that are often proposed to explain reversible phenomena in halide perovskites.
| Original language | English |
|---|---|
| Article number | 1706273 |
| Journal | Advanced Materials |
| Volume | 30 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Mar 8 2018 |
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Keywords
- bleaching
- halide perovskites
- photoluminescence
- self-healing
- self-repair
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Self-Healing Inside APbBr3 Halide Perovskite Crystals. / Ceratti, Davide Raffaele; Rakita, Yevgeny; Cremonesi, Llorenç; Tenne, Ron; Kalchenko, Vyacheslav; Elbaum, Michael; Oron, Dan; Potenza, Marco Alberto Carlo; Hodes, Gary; Cahen, David.
In: Advanced Materials, Vol. 30, No. 10, 1706273, 08.03.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Self-Healing Inside APbBr3 Halide Perovskite Crystals
AU - Ceratti, Davide Raffaele
AU - Rakita, Yevgeny
AU - Cremonesi, Llorenç
AU - Tenne, Ron
AU - Kalchenko, Vyacheslav
AU - Elbaum, Michael
AU - Oron, Dan
AU - Potenza, Marco Alberto Carlo
AU - Hodes, Gary
AU - Cahen, David
PY - 2018/3/8
Y1 - 2018/3/8
N2 - Self-healing, where a modification in some parameter is reversed with time without any external intervention, is one of the particularly interesting properties of halide perovskites. While there are a number of studies showing such self-healing in perovskites, they all are carried out on thin films, where the interface between the perovskite and another phase (including the ambient) is often a dominating and interfering factor in the process. Here, self-healing in perovskite (methylammonium, formamidinium, and cesium lead bromide (MAPbBr3, FAPbBr3, and CsPbBr3)) single crystals is reported, using two-photon microscopy to create damage (photobleaching) ≈110 µm inside the crystals and to monitor the recovery of photoluminescence after the damage. Self-healing occurs in all three perovskites with FAPbBr3 the fastest (≈1 h) and CsPbBr3 the slowest (tens of hours) to recover. This behavior, different from surface-dominated stability trends, is typical of the bulk and is strongly dependent on the localization of degradation products not far from the site of the damage. The mechanism of self-healing is discussed with the possible participation of polybromide species. It provides a closed chemical cycle and does not necessarily involve defect or ion migration phenomena that are often proposed to explain reversible phenomena in halide perovskites.
AB - Self-healing, where a modification in some parameter is reversed with time without any external intervention, is one of the particularly interesting properties of halide perovskites. While there are a number of studies showing such self-healing in perovskites, they all are carried out on thin films, where the interface between the perovskite and another phase (including the ambient) is often a dominating and interfering factor in the process. Here, self-healing in perovskite (methylammonium, formamidinium, and cesium lead bromide (MAPbBr3, FAPbBr3, and CsPbBr3)) single crystals is reported, using two-photon microscopy to create damage (photobleaching) ≈110 µm inside the crystals and to monitor the recovery of photoluminescence after the damage. Self-healing occurs in all three perovskites with FAPbBr3 the fastest (≈1 h) and CsPbBr3 the slowest (tens of hours) to recover. This behavior, different from surface-dominated stability trends, is typical of the bulk and is strongly dependent on the localization of degradation products not far from the site of the damage. The mechanism of self-healing is discussed with the possible participation of polybromide species. It provides a closed chemical cycle and does not necessarily involve defect or ion migration phenomena that are often proposed to explain reversible phenomena in halide perovskites.
KW - bleaching
KW - halide perovskites
KW - photoluminescence
KW - self-healing
KW - self-repair
UR - http://www.scopus.com/inward/record.url?scp=85040691413&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85040691413&partnerID=8YFLogxK
U2 - 10.1002/adma.201706273
DO - 10.1002/adma.201706273
M3 - Article
AN - SCOPUS:85040691413
VL - 30
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 10
M1 - 1706273
ER -