Wide-angle x-ray diffraction evidence of structural coherence in CsPbBr3 nanocrystal superlattices
(2019) In ACS Materials Letters 1(2). p.272-276- Abstract
Films made of colloidal CsPbBr3 nanocrystals packed in isolated or densely-packed superlattices display a remarkably high degree of structural coherence. The structural coherence is revealed by the presence of satellite peaks accompanying Bragg reflections in wide-angle X-ray diffraction experiments in parallel-beam reflection geometry. The satellite peaks, also called “superlattice reflections”, arise from the interference of X-rays diffracted by the atomic planes of the orthorhombic perovskite lattice. The interference is due to the precise spatial periodicity of the nanocrystals separated by organic ligands in the superlattice. The presence of satellite peaks is a fingerprint of the high crystallinity and long-range order... (More)
Films made of colloidal CsPbBr3 nanocrystals packed in isolated or densely-packed superlattices display a remarkably high degree of structural coherence. The structural coherence is revealed by the presence of satellite peaks accompanying Bragg reflections in wide-angle X-ray diffraction experiments in parallel-beam reflection geometry. The satellite peaks, also called “superlattice reflections”, arise from the interference of X-rays diffracted by the atomic planes of the orthorhombic perovskite lattice. The interference is due to the precise spatial periodicity of the nanocrystals separated by organic ligands in the superlattice. The presence of satellite peaks is a fingerprint of the high crystallinity and long-range order of nanocrystals, comparable to those of multilayer superlattices prepared by physical methods. The angular separation between satellite peaks is highly sensitive to changes in the superlattice periodicity. These characteristics of the satellite peaks are exploited to track the superlattice compression under vacuum, as well as to observe the superlattice growth in situ from colloidal solutions by slow solvent evaporation.
(Less)
- author
- Toso, Stefano
; Baranov, Dmitry
LU
; Giannini, Cinzia ; Marras, Sergio and Manna, Liberato
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- in
- ACS Materials Letters
- volume
- 1
- issue
- 2
- pages
- 5 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85097136373
- ISSN
- 2639-4979
- DOI
- 10.1021/acsmaterialslett.9b00217
- language
- English
- LU publication?
- no
- additional info
- Funding Information: The work of S.T. and L.M. was supported by the European Union under grant agreement no. 614897 (ERC Grant TRANS-NANO). The work of D.B. was supported by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 794560 (RETAIN). Funding Information: The work of S.T. and L.M. was supported by the European Union under grant agreement no. 614897 (ERC Grant TRANS-NANO). The work of D.B. was supported by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 794560 (RETAIN). Publisher Copyright: © 2020 American Chemical Society. All rights reserved.
- id
- be9bf103-8c6a-4271-bc91-e073a67a6906
- date added to LUP
- 2023-01-17 11:59:17
- date last changed
- 2023-02-14 12:43:17
@article{be9bf103-8c6a-4271-bc91-e073a67a6906, abstract = {{<p>Films made of colloidal CsPbBr<sub>3</sub> nanocrystals packed in isolated or densely-packed superlattices display a remarkably high degree of structural coherence. The structural coherence is revealed by the presence of satellite peaks accompanying Bragg reflections in wide-angle X-ray diffraction experiments in parallel-beam reflection geometry. The satellite peaks, also called “superlattice reflections”, arise from the interference of X-rays diffracted by the atomic planes of the orthorhombic perovskite lattice. The interference is due to the precise spatial periodicity of the nanocrystals separated by organic ligands in the superlattice. The presence of satellite peaks is a fingerprint of the high crystallinity and long-range order of nanocrystals, comparable to those of multilayer superlattices prepared by physical methods. The angular separation between satellite peaks is highly sensitive to changes in the superlattice periodicity. These characteristics of the satellite peaks are exploited to track the superlattice compression under vacuum, as well as to observe the superlattice growth in situ from colloidal solutions by slow solvent evaporation.</p>}}, author = {{Toso, Stefano and Baranov, Dmitry and Giannini, Cinzia and Marras, Sergio and Manna, Liberato}}, issn = {{2639-4979}}, language = {{eng}}, number = {{2}}, pages = {{272--276}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Materials Letters}}, title = {{Wide-angle x-ray diffraction evidence of structural coherence in CsPbBr<sub>3</sub> nanocrystal superlattices}}, url = {{http://dx.doi.org/10.1021/acsmaterialslett.9b00217}}, doi = {{10.1021/acsmaterialslett.9b00217}}, volume = {{1}}, year = {{2019}}, }