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Ivan Scheblykin. Portrait.

Ivan Scheblykin

Professor

Ivan Scheblykin. Portrait.

Free-Standing Metal Halide Perovskite Nanowire Arrays with Blue-Green Heterostructures

Author

  • Zhaojun Zhang
  • Nils Lamers
  • Chen Sun
  • Crispin Hetherington
  • Ivan G. Scheblykin
  • Jesper Wallentin

Summary, in English

Vertically aligned metal halide perovskite (MHP) nanowires are promising for various optoelectronic applications, which can be further enhanced by heterostructures. However, present methods to obtain free-standing vertically aligned MHP nanowire arrays and heterostructures lack the scalability needed for applications. We use a low-temperature solution process to prepare free-standing vertically aligned green-emitting CsPbBr3 nanowires from anodized aluminum oxide templates. The length is controlled from 1 to 20 μm by the precursor amount. The nanowires are single-crystalline and exhibit excellent photoluminescence, clear light guiding and high photoconductivity with a responsivity of 1.9 A/W. We demonstrate blue-green heterostructured nanowire arrays by converting the free-standing part of the nanowires to CsPbCl1.1Br1.9 in an anion exchange process. Our results demonstrate a scalable, self-aligned, and lithography-free approach to achieve high quality free-standing MHP nanowires arrays and heterostructures, offering new possibilities for optoelectronic applications.

Department/s

  • Synchrotron Radiation Research
  • Chemical Physics
  • Centre for Analysis and Synthesis
  • NanoLund: Centre for Nanoscience

Publishing year

2022-03-24

Language

English

Pages

2941-2947

Publication/Series

Nano Letters

Volume

22

Issue

7

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Condensed Matter Physics (including Material Physics, Nano Physics)

Keywords

  • free-standing nanowires arrays
  • metal halide perovskite
  • nanowire heterostructure arrays
  • vapor anion exchange

Status

Published

ISBN/ISSN/Other

  • ISSN: 1530-6984