Publication
Title
Cuboidal supraparticles self-assembled from cubic CsPbBr3 perovskite nanocrystals
Author
Abstract
Colloidal CsPbBr3 nanocrystals (NCs) have emerged as promising candidates for various opto-electronic applications, such as light-emitting diodes, photodetectors, and solar cells. Here, we report on the self-assembly of cubic NCs from an organic suspension into ordered cuboidal supraparticles (SPs) and their structural and optical properties. Upon increasing the NC concentration or by addition of a nonsolvent, the formation of the SPs occurs homogeneously in the suspension, as monitored by in situ X-ray scattering measurements. The three-dimensional structure of the SPs was resolved through high-angle annular dark-field scanning transmission electron microscopy and electron tomography. The NCs are atomically aligned but not connected. We characterize NC vacancies on superlattice positions both in the bulk and on the surface of the SPs. The occurrence of localized atomic-type NC vacancies-instead of delocalized ones-indicates that NC-NC attractions are important in the assembly, as we verify with Monte Carlo simulations. Even when assembled in SPs, the NCs show bright emission, with a red shift of about 30 meV compared to NCs in suspension.
Language
English
Source (journal)
The journal of physical chemistry: C : nanomaterials and interfaces. - Washington, D.C., 2007, currens
Publication
Washington, D.C. : 2018
ISSN
1932-7447 [print]
1932-7455 [online]
Volume/pages
122 :27 (2018) , p. 15706-15712
ISI
000439003600071
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Real-time electron tomography for efficient 3D characterization of functional nanomaterials.
HIERARSACOL: Hierarchical Self Assembly of Colloids: Control and Manipulation from Nano-Granular
Colouring Atoms in 3 Dimensions (COLOURATOM).
PEGASUS-2: [PEGASUS]², giving wings to your career
Understanding and optimization of the property-structure connection of Lanthanide doped luminescent nanoparticles through advanced transmission electron microscopy.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 07.09.2018
Last edited 03.09.2021
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