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Single-Crystalline Perovskite Nanowire Arrays for Stable X-ray Scintillators with Micrometer Spatial Resolution

Zhang, Zhaojun LU ; Dierks, Hanna LU ; Lamers, Nils LU ; Sun, Chen LU ; Nováková, Klára LU ; Hetherington, Crispin LU orcid ; Scheblykin, Ivan G. LU orcid and Wallentin, Jesper LU (2022) In ACS Applied Nano Materials 5(1). p.881-889
Abstract

X-ray scintillation detectors based on metal halide perovskites have shown excellent light yield, but they mostly target applications with spatial resolution at the tens of micrometers level. Here, we use a one-step solution method to grow arrays of 15-μm-long single-crystalline CsPbBr3 nanowires (NWs) in an AAO (anodized aluminum oxide) membrane template, with nanowire diameters ranging from 30 to 360 nm. The CsPbBr3 nanowires in AAO (CsPbBr3 NW/AAO) show increasing X-ray scintillation efficiency with decreasing nanowire diameter, with a maximum photon yield of ∼5 »300 ph/MeV at 30 nm diameter. The CsPbBr3 NW/AAO composites also display high radiation resistance, with a scintillation-intensity decrease of only ∼20-30% after 24 h of... (More)

X-ray scintillation detectors based on metal halide perovskites have shown excellent light yield, but they mostly target applications with spatial resolution at the tens of micrometers level. Here, we use a one-step solution method to grow arrays of 15-μm-long single-crystalline CsPbBr3 nanowires (NWs) in an AAO (anodized aluminum oxide) membrane template, with nanowire diameters ranging from 30 to 360 nm. The CsPbBr3 nanowires in AAO (CsPbBr3 NW/AAO) show increasing X-ray scintillation efficiency with decreasing nanowire diameter, with a maximum photon yield of ∼5 »300 ph/MeV at 30 nm diameter. The CsPbBr3 NW/AAO composites also display high radiation resistance, with a scintillation-intensity decrease of only ∼20-30% after 24 h of X-ray exposure (integrated dose 162 Gyair) and almost no change after ambient storage for 2 months. X-ray images can distinguish line pairs with a spacing of 2 μm for all nanowire diameters, while slanted edge measurements show a spatial resolution of ∼160 lp/mm at modulation transfer function (MTF) = 0.1. The combination of high spatial resolution, radiation stability, and easy fabrication makes these CsPbBr3 NW/AAO scintillators a promising candidate for high-resolution X-ray imaging applications.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
micrometer spatial resolution, nanowire array, perovskite, X-ray imaging
in
ACS Applied Nano Materials
volume
5
issue
1
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:35128340
  • scopus:85121974141
ISSN
2574-0970
DOI
10.1021/acsanm.1c03575
language
English
LU publication?
yes
additional info
Funding Information: This project received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant agreement no. 801847). This research was also funded by the Olle Engkvist foundation, NanoLund, and Marie Sklodowska Curie Actions Cofund, Project INCA 600398. This work was partly supported by the Swedish Research Council (2020-03530) and Knut and Alice Wallenberg Foundation (2016.0059). The Research Infrastructure Fellow program from the Swedish Foundation for Strategic Research also provided support for this research. Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
id
573c631c-e3a8-4298-b5cd-79a0d2715de6
date added to LUP
2022-01-07 10:20:19
date last changed
2024-11-04 14:06:07
@article{573c631c-e3a8-4298-b5cd-79a0d2715de6,
  abstract     = {{<p>X-ray scintillation detectors based on metal halide perovskites have shown excellent light yield, but they mostly target applications with spatial resolution at the tens of micrometers level. Here, we use a one-step solution method to grow arrays of 15-μm-long single-crystalline CsPbBr3 nanowires (NWs) in an AAO (anodized aluminum oxide) membrane template, with nanowire diameters ranging from 30 to 360 nm. The CsPbBr3 nanowires in AAO (CsPbBr3 NW/AAO) show increasing X-ray scintillation efficiency with decreasing nanowire diameter, with a maximum photon yield of ∼5 »300 ph/MeV at 30 nm diameter. The CsPbBr3 NW/AAO composites also display high radiation resistance, with a scintillation-intensity decrease of only ∼20-30% after 24 h of X-ray exposure (integrated dose 162 Gyair) and almost no change after ambient storage for 2 months. X-ray images can distinguish line pairs with a spacing of 2 μm for all nanowire diameters, while slanted edge measurements show a spatial resolution of ∼160 lp/mm at modulation transfer function (MTF) = 0.1. The combination of high spatial resolution, radiation stability, and easy fabrication makes these CsPbBr3 NW/AAO scintillators a promising candidate for high-resolution X-ray imaging applications. </p>}},
  author       = {{Zhang, Zhaojun and Dierks, Hanna and Lamers, Nils and Sun, Chen and Nováková, Klára and Hetherington, Crispin and Scheblykin, Ivan G. and Wallentin, Jesper}},
  issn         = {{2574-0970}},
  keywords     = {{micrometer spatial resolution; nanowire array; perovskite; X-ray imaging}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  pages        = {{881--889}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Nano Materials}},
  title        = {{Single-Crystalline Perovskite Nanowire Arrays for Stable X-ray Scintillators with Micrometer Spatial Resolution}},
  url          = {{http://dx.doi.org/10.1021/acsanm.1c03575}},
  doi          = {{10.1021/acsanm.1c03575}},
  volume       = {{5}},
  year         = {{2022}},
}