Pushing PbS/Metal‐Halide‐Perovskite Core/Epitaxial‐Ligand‐Shell Nanocrystal Photodetectors beyond 3 µm Wavelength

Journal article
(Original article)


Publication Details

Author(s): Killilea NA, Wu M, Sytnyk M, Yousefi Amin AA, Mashkov O, Spiecker E, Heiß W
Journal: Advanced Functional Materials
Publication year: 2019
ISSN: 1616-301X
eISSN: 1616-3018
Language: English


Abstract

PbS
nanocrystals have been proven to be highly suitable for photodetector fabrication
by facile solution processing, and have been successfully tested  as photosensitive material in imaging devices.
So far, their spectral response has been blue-shifted with respect to that of
commercial bulk PbS detectors, due to quantum confinement in nanostructures
smaller than the exciton Bohr radius. Here, a PbS nanocrystal synthesis
approach is introduced, allowing to surpass this limit, and thus to push the
cut-off wavelength to the value of the bulk material. To avoid self-absorbance
from ligands within the spectral range of the photoconducting signal, an all
inorganic metal-halide-perovskite is applied to form a semiconducting ligand
shell. The photoconductors, which are provided from a single drop, do not only
show a record in long wavelength operation for PbS nanocrystal detectors but
also a room temperature detectivity >1010
Jones, which is on par with that of commercial bulk PbS detectors. Combining
these properties might find application in future low-cost infrared imagers,
which are currently still elusive due to their high prices.


FAU Authors / FAU Editors

Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)
Killilea, Niall Andrew
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)
Mashkov, Oleksandr
Institute Materials for Electronics and Energy Technology (i-MEET)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Sytnyk, Mykhailo
Institute Materials for Electronics and Energy Technology (i-MEET)
Wu, Mingjian Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Yousefi Amin, Amir-Abbas
Institute Materials for Electronics and Energy Technology (i-MEET)


Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


How to cite

APA:
Killilea, N.A., Wu, M., Sytnyk, M., Yousefi Amin, A.-A., Mashkov, O., Spiecker, E., & Heiß, W. (2019). Pushing PbS/Metal‐Halide‐Perovskite Core/Epitaxial‐Ligand‐Shell Nanocrystal Photodetectors beyond 3 µm Wavelength. Advanced Functional Materials. https://dx.doi.org/10.1002/adfm.201807964

MLA:
Killilea, Niall Andrew, et al. "Pushing PbS/Metal‐Halide‐Perovskite Core/Epitaxial‐Ligand‐Shell Nanocrystal Photodetectors beyond 3 µm Wavelength." Advanced Functional Materials (2019).

BibTeX: 

Last updated on 2019-21-05 at 16:22