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In Situ Imaging of Ferroelastic Domain Dynamics in CsPbBr3Perovskite Nanowires by Nanofocused Scanning X-ray Diffraction

Marçal, Lucas A.B. LU ; Oksenberg, Eitan ; Dzhigaev, Dmitry LU ; Hammarberg, Susanna LU ; Rothman, Amnon ; Björling, Alexander LU ; Unger, Eva LU ; Mikkelsen, Anders LU ; Joselevich, Ernesto and Wallentin, Jesper LU (2020) In ACS Nano 14(11). p.15973-15982
Abstract

The interest in metal halide perovskites has grown as impressive results have been shown in solar cells, light emitting devices, and scintillators, but this class of materials have a complex crystal structure that is only partially understood. In particular, the dynamics of the nanoscale ferroelastic domains in metal halide perovskites remains difficult to study. An ideal in situ imaging method for ferroelastic domains requires a challenging combination of high spatial resolution and long penetration depth. Here, we demonstrate in situ temperature-dependent imaging of ferroelastic domains in a single nanowire of metal halide perovskite, CsPbBr3. Scanning X-ray diffraction with a 60 nm beam was used to retrieve local structural... (More)

The interest in metal halide perovskites has grown as impressive results have been shown in solar cells, light emitting devices, and scintillators, but this class of materials have a complex crystal structure that is only partially understood. In particular, the dynamics of the nanoscale ferroelastic domains in metal halide perovskites remains difficult to study. An ideal in situ imaging method for ferroelastic domains requires a challenging combination of high spatial resolution and long penetration depth. Here, we demonstrate in situ temperature-dependent imaging of ferroelastic domains in a single nanowire of metal halide perovskite, CsPbBr3. Scanning X-ray diffraction with a 60 nm beam was used to retrieve local structural properties for temperatures up to 140 °C. We observed a single Bragg peak at room temperature, but at 80 °C, four new Bragg peaks appeared, originating in different real-space domains. The domains were arranged in periodic stripes in the center and with a hatched pattern close to the edges. Reciprocal space mapping at 80 °C was used to quantify the local strain and lattice tilts, revealing the ferroelastic nature of the domains. The domains display a partial stability to further temperature changes. Our results show the dynamics of nanoscale ferroelastic domain formation within a single-crystal perovskite nanostructure, which is important both for the fundamental understanding of these materials and for the development of perovskite-based devices.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CsPbBr, domains, ferroelasticity, nanowires, perovskite, X-ray diffraction
in
ACS Nano
volume
14
issue
11
pages
15973 - 15982
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:33074668
  • scopus:85096121149
ISSN
1936-0851
DOI
10.1021/acsnano.0c07426
language
English
LU publication?
yes
id
8cd06c2d-616e-4a4c-b46b-cc86c006596d
date added to LUP
2020-11-26 09:59:36
date last changed
2021-01-06 02:56:49
@article{8cd06c2d-616e-4a4c-b46b-cc86c006596d,
  abstract     = {<p>The interest in metal halide perovskites has grown as impressive results have been shown in solar cells, light emitting devices, and scintillators, but this class of materials have a complex crystal structure that is only partially understood. In particular, the dynamics of the nanoscale ferroelastic domains in metal halide perovskites remains difficult to study. An ideal in situ imaging method for ferroelastic domains requires a challenging combination of high spatial resolution and long penetration depth. Here, we demonstrate in situ temperature-dependent imaging of ferroelastic domains in a single nanowire of metal halide perovskite, CsPbBr3. Scanning X-ray diffraction with a 60 nm beam was used to retrieve local structural properties for temperatures up to 140 °C. We observed a single Bragg peak at room temperature, but at 80 °C, four new Bragg peaks appeared, originating in different real-space domains. The domains were arranged in periodic stripes in the center and with a hatched pattern close to the edges. Reciprocal space mapping at 80 °C was used to quantify the local strain and lattice tilts, revealing the ferroelastic nature of the domains. The domains display a partial stability to further temperature changes. Our results show the dynamics of nanoscale ferroelastic domain formation within a single-crystal perovskite nanostructure, which is important both for the fundamental understanding of these materials and for the development of perovskite-based devices.</p>},
  author       = {Marçal, Lucas A.B. and Oksenberg, Eitan and Dzhigaev, Dmitry and Hammarberg, Susanna and Rothman, Amnon and Björling, Alexander and Unger, Eva and Mikkelsen, Anders and Joselevich, Ernesto and Wallentin, Jesper},
  issn         = {1936-0851},
  language     = {eng},
  number       = {11},
  pages        = {15973--15982},
  publisher    = {The American Chemical Society (ACS)},
  series       = {ACS Nano},
  title        = {In Situ Imaging of Ferroelastic Domain Dynamics in CsPbBr<sub>3</sub>Perovskite Nanowires by Nanofocused Scanning X-ray Diffraction},
  url          = {http://dx.doi.org/10.1021/acsnano.0c07426},
  doi          = {10.1021/acsnano.0c07426},
  volume       = {14},
  year         = {2020},
}