Structural and chemical properties of anion exchanged CsPb(Br(1−x)Cl x )3 heterostructured perovskite nanowires imaged by nanofocused x-rays
(2024) In Nanotechnology 35(26).- Abstract
Over the last years metal halide perovskites have demonstrated remarkable potential for integration in light emitting devices. Heterostructures allow for tunable bandgap depending on the local anion composition, crucial for optoelectronic devices, but local structural effects of anion exchange in single crystals is not fully understood. Here, we investigate how the anion exchange of CsPbBr3 nanowires fully and locally exposed to HCl vapor affects the local crystal structure, using nanofocused x-rays. We study the nanoscale composition and crystal structure as function of HCl exposure time and demonstrate the correlation of anion exchange with changes in the lattice parameter. The local composition was measured by x-ray... (More)
Over the last years metal halide perovskites have demonstrated remarkable potential for integration in light emitting devices. Heterostructures allow for tunable bandgap depending on the local anion composition, crucial for optoelectronic devices, but local structural effects of anion exchange in single crystals is not fully understood. Here, we investigate how the anion exchange of CsPbBr3 nanowires fully and locally exposed to HCl vapor affects the local crystal structure, using nanofocused x-rays. We study the nanoscale composition and crystal structure as function of HCl exposure time and demonstrate the correlation of anion exchange with changes in the lattice parameter. The local composition was measured by x-ray fluorescence and x-ray diffraction, with general agreement of both methods but with much less variation using latter. The heterostructured nanowires exhibit unintentional gradients in composition, both axially and radially. Ferroelastic domains are observed for all HCl exposure times, and the magnitude of the lattice tilt at the domain walls scales with the Cl concentration.
(Less)
- author
- organization
- publishing date
- 2024-06-24
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- heterostructures, nanowires, x-ray diffraction, x-ray fluorescence
- in
- Nanotechnology
- volume
- 35
- issue
- 26
- article number
- 265710
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85190297511
- pmid:38502953
- ISSN
- 0957-4484
- DOI
- 10.1088/1361-6528/ad355c
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2024 The Author(s). Published by IOP Publishing Ltd
- id
- 93a506d6-3a05-48eb-9e9f-d2c1babfb43b
- date added to LUP
- 2024-04-22 09:51:52
- date last changed
- 2024-09-24 00:43:06
@article{93a506d6-3a05-48eb-9e9f-d2c1babfb43b, abstract = {{<p>Over the last years metal halide perovskites have demonstrated remarkable potential for integration in light emitting devices. Heterostructures allow for tunable bandgap depending on the local anion composition, crucial for optoelectronic devices, but local structural effects of anion exchange in single crystals is not fully understood. Here, we investigate how the anion exchange of CsPbBr<sub>3</sub> nanowires fully and locally exposed to HCl vapor affects the local crystal structure, using nanofocused x-rays. We study the nanoscale composition and crystal structure as function of HCl exposure time and demonstrate the correlation of anion exchange with changes in the lattice parameter. The local composition was measured by x-ray fluorescence and x-ray diffraction, with general agreement of both methods but with much less variation using latter. The heterostructured nanowires exhibit unintentional gradients in composition, both axially and radially. Ferroelastic domains are observed for all HCl exposure times, and the magnitude of the lattice tilt at the domain walls scales with the Cl concentration.</p>}}, author = {{Marçal, L. A.B. and Lamers, N. and Hammarberg, S. and Zhang, Zhaojun and Chen, Huaiyu and Dzhigaev, D. and Gomez-Gonzalez, M. A. and Parker, J. E. and Björling, A. and Mikkelsen, A. and Wallentin, J.}}, issn = {{0957-4484}}, keywords = {{heterostructures; nanowires; x-ray diffraction; x-ray fluorescence}}, language = {{eng}}, month = {{06}}, number = {{26}}, publisher = {{IOP Publishing}}, series = {{Nanotechnology}}, title = {{Structural and chemical properties of anion exchanged CsPb(Br<sub>(1−x)</sub>Cl<sub> x </sub>)<sub>3</sub> heterostructured perovskite nanowires imaged by nanofocused x-rays}}, url = {{http://dx.doi.org/10.1088/1361-6528/ad355c}}, doi = {{10.1088/1361-6528/ad355c}}, volume = {{35}}, year = {{2024}}, }