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Mohamed Abdellah

Researcher

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Inorganic Ions Assisted Anisotropic Growth of CsPbCl3 Nanowires with Surface Passivation Effect

Author

  • Y Tang
  • X. Cao
  • Alireza Honarfar
  • Mohamed Abdellah
  • C Chen
  • J. Avila
  • L Asensio
  • Leif Hammarström
  • Sa J
  • Sophie E Canton
  • Kaibo Zheng
  • Tönu Pullerits
  • Qijin Chi

Summary, in English

All-inorganic halide perovskite nanowires (NWs) exhibit improved thermal and hydrolysis stability and could thus play a vital role in nanoscale optoelectronics. Among them, blue-light-based devices are extremely limited because of the lack of a facile method to obtain high-purity CsPbCl3 NWs. Herein, we report a direct and facile method for the synthesis of CsPbCl3 NWs assisted by inorganic ions that served both as a morphology controlling agent for the anisotropic growth of nanomaterials and a surface passivation species modulating the surface of nanomaterials. This new approach allows us to obtain high-purity and size-uniform NWs as long as 500 nm in length and 20 nm in diameter with high reproducibility. X-ray photoelectron spectroscopy and ultrafast spectroscopic measurements confirmed that a reduced band gap caused by the surface species of NWs relative to nanocubes (NCs) was achieved at the photon energy of 160 eV because of the hybrid surface passivation contributed by adsorbed inorganic ions. The resulting NWs demonstrate significantly enhanced photoelectrochemical performances, 3.5-fold increase in the photocurrent generation, and notably improved stability compared to their NC counterparts. Our results suggest that the newly designed NWs could be a promising material for the development of nanoscale optoelectronic devices.

Department/s

  • Chemical Physics
  • NanoLund

Publishing year

2018

Language

English

Pages

29574-29582

Publication/Series

ACS Applied Materials and Interfaces

Volume

10

Issue

35

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Physical Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 1944-8244