Halide perovskites as disposable epitaxial templates for the phase-selective synthesis of lead sulfochloride nanocrystals

Stefano Toso, Muhammad Imran (), Enrico Mugnaioli, Anna Moliterni (), Rocco Caliandro, Nadine J. Schrenker, Andrea Pianetti, Juliette Zito, Francesco Zaccaria, Ye Wu, Mauro Gemmi (), Cinzia Giannini, Sergio Brovelli (), Ivan Infante (), Sara Bals () and Liberato Manna ()
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Stefano Toso: Istituto Italiano di Tecnologia
Muhammad Imran: Istituto Italiano di Tecnologia
Enrico Mugnaioli: Istituto Italiano di Tecnologia
Anna Moliterni: Istituto di Cristallografia – Consiglio Nazionale delle Ricerche (IC–CNR)
Rocco Caliandro: Istituto di Cristallografia – Consiglio Nazionale delle Ricerche (IC–CNR)
Nadine J. Schrenker: University of Antwerp
Andrea Pianetti: Università degli Studi di Milano-Bicocca
Juliette Zito: Istituto Italiano di Tecnologia
Francesco Zaccaria: Istituto Italiano di Tecnologia
Ye Wu: Istituto Italiano di Tecnologia
Mauro Gemmi: Istituto Italiano di Tecnologia
Cinzia Giannini: Istituto di Cristallografia – Consiglio Nazionale delle Ricerche (IC–CNR)
Sergio Brovelli: Università degli Studi di Milano-Bicocca
Ivan Infante: Istituto Italiano di Tecnologia
Sara Bals: University of Antwerp
Liberato Manna: Istituto Italiano di Tecnologia

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Colloidal chemistry grants access to a wealth of materials through simple and mild reactions. However, even few elements can combine in a variety of stoichiometries and structures, potentially resulting in impurities or even wrong products. Similar issues have been long addressed in organic chemistry by using reaction-directing groups, that are added to a substrate to promote a specific product and are later removed. Inspired by such approach, we demonstrate the use of CsPbCl3 perovskite nanocrystals to drive the phase-selective synthesis of two yet unexplored lead sulfochlorides: Pb3S2Cl2 and Pb4S3Cl2. When homogeneously nucleated in solution, lead sulfochlorides form Pb3S2Cl2 nanocrystals. Conversely, the presence of CsPbCl3 triggers the formation of Pb4S3Cl2/CsPbCl3 epitaxial heterostructures. The phase selectivity is guaranteed by the continuity of the cationic subnetwork across the interface, a condition not met in a hypothetical Pb3S2Cl2/CsPbCl3 heterostructure. The perovskite domain is then etched, delivering phase-pure Pb4S3Cl2 nanocrystals that could not be synthesized directly.

Date: 2022
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DOI: 10.1038/s41467-022-31699-1

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