Perovskite-Chalcogenide Epitaxial Heterostructures: Possibility of Multiple Axial Orientations of CsPbBr3 Nanocrystals on PbBi2S4 Nanorods

Patra, A and Jagadish, K and Shyamal, S and Ravishankar, N and Pradhan, N (2024) Perovskite-Chalcogenide Epitaxial Heterostructures: Possibility of Multiple Axial Orientations of CsPbBr3 Nanocrystals on PbBi2S4 Nanorods. In: Chemistry of Materials .

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Abstract

The chemistry of designing epitaxial perovskite-chalcogenide nanocrystal heterostructures still could not be established yet in spite of significant successes in understanding both perovskite and chalcogenide nanostructures formation. Interfacing the ionic-covalent bonding at the junction of both remains the major obstacle for establishing the seamless formation of such nanostructures. Keeping the compatibility of Bi(III) ions with Pb(II) in different lead halide perovskite nanocrystals, herein, multiple possibilities of interface junctions of ionic CsPbBr3 and covalent PbBi2S4 sulfide nanocrystals are reported. Creating the common Pb(II) sublattice structures in this system indeed helped in designing such a wide possibility of nanocrystal heterostructures, and this supported the connection of CsPbBr3 polyhedral nanocrystals with PbBi2S4 nanorods in different orientations. While epitaxial heterostructure formations are typically observed with the interface of specific facets of two nanoscale materials, here, for perovskites, this provides multiple options of different facets combination. This concept remained important for fundamental understanding in creating junctions of ionic-covalent crystals and also helped in establishing the method for designing halide perovskite-chalcogenide nanocrystal heterostructures. Such interface junctions, where defects are mostly generated due to halide deficiency, quench the optical emission, but, in contrary, enhance the catalytic activities. © 2024 American Chemical Society.

Item Type: Journal Article
Additional Information: The copyright for this article belongs to American Chemical Society.
Uncontrolled Keywords: Bismuth compounds; Bromine compounds; Catalyst activity; Chalcogenides; Lead compounds; Nanorods; Perovskite; Sulfur compounds, Axial orientations; Covalent bonding; Epitaxial heterostructure; Halide perovskites; Ionic-covalent crystals; Multiple-axial; Nanoscale material; Nanostructure formation; Optical emissions; Sublattice structure, Nanocrystals
Subjects: Division of Chemical Sciences > Materials Research Centre
Depositing User: Kavya T T Thekkan Thottathil
Date Deposited: 30 Aug 2024 05:55
Last Modified: 30 Aug 2024 05:55
URI: https://eprints.iisc.ac.in/id/eprint/84905

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