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Dmitry Baranov. Portrait.

Dmitry Baranov

Associate senior lecturer

Dmitry Baranov. Portrait.

How Antisolvent-Induced Ligand Stripping Shapes CsPbX3 Nanocrystals and Their Assemblies

Author

  • Jonas L. Hiller
  • Robert Thalwitzer
  • Ata Bozkurt
  • Ross Ewan Carter
  • Theresa Hettiger
  • Markus Fröhlich
  • Richard Hodak
  • Matheus Gomes Ferreira
  • Martin Eberle
  • Ekaterina Kneschaurek
  • Gerard N. Hinsley
  • Bihan Wang
  • Kuan Hoon Ngoi
  • Elke Nadler
  • Wojciech Roseker
  • Fabian Westermeier
  • Michael Sprung
  • Dmitry Baranov
  • Jannika Lauth
  • Frank Schreiber
  • Ivan A. Vartanyants
  • Marcus Scheele
  • Ivan A. Zaluzhnyy
Show all

Summary, in English

Supercrystals of lead-halide perovskite nanocrystals combine the semiconducting properties of bulk perovskites with quantum confinement effects and extend them to the macroscopic scale. Supercrystals assembled via a two-layer phase diffusion process using an acetonitrile antisolvent were recently shown to be unusually robust. We investigate how the acetonitrile-assisted self-assembly process influences surface chemistry, the atomic lattice of nanocrystals, and the structure of the supercrystal. Using quantitative NMR spectroscopy, nanofocused X-ray diffraction, and optical spectroscopy, we show that a reduced density of the ligand shell caused by the exposure to acetonitrile in the assembly underlies the mechanical robustness of these supercrystals. Ligand stripping further drives a highly size-selecting lateral growth of the supercrystal and induces anisotropic relaxation of the nanocrystal atomic lattice while preserving the electronic coupling and robust light-emitting properties of the assembly. That enables the mechanical manipulation of supercrystals such as stacking, thereby opening new avenues for integration into optoelectronic devices.

Department/s

  • Lund Laser Centre, LLC
  • LTH Profile Area: Photon Science and Technology
  • LU Profile Area: Light and Materials
  • NanoLund: Centre for Nanoscience
  • Chemical Physics
  • LTH Profile Area: Nanoscience and Semiconductor Technology

Publishing year

2026

Language

English

Pages

2955-2963

Publication/Series

Nano Letters

Volume

26

Issue

8

Document type

Article

Publisher

The American Chemical Society (ACS)

Topic

  • Materials Chemistry

Keywords

  • SDG 7 - Affordable and Clean Energy

Status

Published

Project

  • Engineering of Superfluorescent Nanocrystal Solids

ISBN/ISSN/Other

  • ISSN: 1530-6992