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Facets Directed Connecting Perovskite Nanocrystals.

08:00 EDT 24th March 2020 | BioPortfolio

Summary of "Facets Directed Connecting Perovskite Nanocrystals."

Connecting nanocrystals with removal of interface ligand barriers is one of the key steps for efficient carrier transportation in opto-electronic device fabrication. Typically, ion migration for crystal deformation or connection with another nanocrystals needs a solvent as medium. However, in contrary, this has been observed for CsPbBr3 perovskite nanocrystals in film where nanocrystals were swollen to get wider and fused with adjacent nanocrystals in self-assembly on film during solvent evaporation. Depending on precursor composition and exposed facets, again these connections could be programmed for tuning their connecting directions leading to different shapes. Aging further on solid substrate, these were also turned to continuous film of nanostructures eliminating all inter-particles gaps on the film. This transformation could be ceased at any point of time, simply by heating or adding sufficient ligands. Analysis suggested that these unique and controlled connections were only observed with polyhedron shaped nanostructures with certain compositions and not with traditionally cubes. Details of this solid surface transformation during solvent evaporation was analysed and inter-particle material transfer type mechanism was proposed. As these observations were not seen in chalcogenide and oxide nanocrystals, and exclusively observed in perovskite nanocrystals, this would add new fundamentals to the insights of crystal growths of nanocrystals and would also help in obtaining films of connecting nanocrystals.

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This article was published in the following journal.

Name: Journal of the American Chemical Society
ISSN: 1520-5126
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