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Colloidal Quasi‐2D Methylammonium Lead Bromide Perovskite Nanostructures with Tunable Shape and High Chemical Stability

Eugen Klein, Rostyslav Lesyuk Orcid Logo, Christian Klinke

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Swansea University Author: Christian Klinke

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DOI (Published version): 10.1002/smll.202405758

Abstract

Control over the lateral dimensions of colloidal nanostructures is a complex task which requires a deep understanding of the formation mechanism and reactivity in the corresponding systems. As a result, it provides a well‐founded insight to the physical and chemical properties of these materials. In...

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Published in: Small
ISSN: 1613-6810 1613-6829
Published: Wiley 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa67750
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Abstract: Control over the lateral dimensions of colloidal nanostructures is a complex task which requires a deep understanding of the formation mechanism and reactivity in the corresponding systems. As a result, it provides a well‐founded insight to the physical and chemical properties of these materials. In this work, the preparation of quasi‐2D methylammonium lead bromide nanostripes and discuss the influence of some specific parameters on the morphology and stability of this material is demonstrated. The variation in the amount of the main ligand dodecylamine gives a large range of structures beginning with 3D brick‐like particles at low concentrations, nanostripes at elevated and ultimately nanosheets at large concentrations. The amount of the co‐ligand trioctylphosphine can alter the width of the nanostripe shape to a certain degree. The thickness can be adjusted by the amount of the second precursor methylammonium bromide. Additionally, insights are given for the suggested formation mechanism of these anisotropic structures as well as for stability against moisture at ambient conditions in comparison with differently synthesized nanosheet samples.
Keywords: 2D nanostructures, colloidal synthesis, methylammonium lead bromide, stability,
College: Faculty of Science and Engineering
Funders: The authors thank the Sylvia Speller group and Regina Lange for providing the AFM setup. The authors thank the co-worker Ronja Piehler for designing the Scheme 1. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) is acknowledged for funding of SFB 1477 “Light-Matter Interactions at Interfaces”, project number 441234705, W03 and W05. The authors also acknowledge the European Regional Development Fund of the European Union for funding the PL spectrometer (GHS-20-0035/P000376218) and X-ray diffractometer (GHS-20-0036/P000379642) and the Deutsche Forschungsgemeinschaft (DFG) for funding an electron microscope Jeol NeoARM TEM (INST 264/161-1 FUGG) and an electron microscope ThermoFisher Talos L120C (INST 264/188-1 FUGG). The authors also thank Henrik Lund and Leibniz-Institute for Catalysis, Rostock (LIKAT) for PXRD measurement in cappilary. Open access funding enabled and organized by Projekt DEAL.

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