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Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals.

Authors :
Frank K
Henke NA
Lampe C
Lorenzen T
März B
Sun X
Haas S
Gutowski O
Dippel AC
Mayer V
Müller-Caspary K
Urban AS
Nickel B
Source :
Nature communications [Nat Commun] 2024 Oct 17; Vol. 15 (1), pp. 8952. Date of Electronic Publication: 2024 Oct 17.
Publication Year :
2024

Abstract

Colloidal lead halide perovskite nanocrystals have potential for lighting applications due to their optical properties. Precise control of the nanocrystal dimensions and composition is a prerequisite for establishing practical applications. However, the rapid nature of their synthesis precludes a detailed understanding of the synthetic pathways, thereby limiting the optimisation. Here, we deduce the formation mechanisms of anisotropic lead halide perovskite nanocrystals, 1D nanorods and 2D nanoplatelets, by combining in situ X-ray scattering and photoluminescence spectroscopy. In both cases, emissive prolate nanoclusters form when the two precursor solutions are mixed. The ensuing antisolvent addition induces the divergent anisotropy: The intermediate nanoclusters are driven into a dense hexagonal mesophase, fusing to form nanorods. Contrastingly, nanoplatelets grow freely dispersed from dissolving nanoclusters, stacking subsequently in lamellar superstructures. Shape and size control of the nanocrystals are determined primarily by the antisolvent's dipole moment and Hansen hydrogen bonding parameter. Exploiting the interplay of antisolvent and organic ligands could enable more complex nanocrystal geometries in the future.<br /> (© 2024. The Author(s).)

Details

Language :
English
ISSN :
2041-1723
Volume :
15
Issue :
1
Database :
MEDLINE
Journal :
Nature communications
Publication Type :
Academic Journal
Accession number :
39420017
Full Text :
https://doi.org/10.1038/s41467-024-53221-5