Elucidating the Weakly Reversible Cs-Pb-Br Perovskite Nanocrystal Reaction Network with High-Throughput Maps and Transformations

Journal of the American Chemical Society
Jakob DahlA Paul Alivisatos

Abstract

Advances in automation and data analytics can aid exploration of the complex chemistry of nanoparticles. Lead halide perovskite colloidal nanocrystals provide an interesting proving ground: there are reports of many different phases and transformations, which has made it hard to form a coherent conceptual framework for their controlled formation through traditional methods. In this work, we systematically explore the portion of Cs-Pb-Br synthesis space in which many optically distinguishable species are formed using high-throughput robotic synthesis to understand their formation reactions. We deploy an automated method that allows us to determine the relative amount of absorbance that can be attributed to each species in order to create maps of the synthetic space. These in turn facilitate improved understanding of the interplay between kinetic and thermodynamic factors that underlie which combination of species are likely to be prevalent under a given set of conditions. Based on these maps, we test potential transformation routes between perovskite nanocrystals of different shapes and phases. We find that shape is determined kinetically, but many reactions between different phases show equilibrium behavior. We demonstrate a dy...Continue Reading

References

Aug 30, 2008·Journal of the American Chemical Society·Jonathan S OwenA Paul Alivisatos
Dec 7, 2010·Journal of the American Chemical Society·Jonathan S OwenA Paul Alivisatos
Jun 8, 2011·ACS Combinatorial Science·Radislav PotyrailoHubert Lam
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Mar 31, 2017·Journal of the American Chemical Society·Zeke LiuA Paul Alivisatos
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Feb 6, 2020·Nature Methods·Pauli VirtanenUNKNOWN SciPy 1.0 Contributors
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Citations

Nov 4, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Rosaria BresciaGiovanni Bertoni
Jan 2, 2021·Chemistry of Materials : a Publication of the American Chemical Society·Muhammad ImranLiberato Manna
Dec 7, 2021·The Journal of Physical Chemistry Letters·Suman BeraNarayan Pradhan

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