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

Killilea NA, Wu M, Sytnyk M, Yousefi Amin AA, Mashkov O, Spiecker E, Heiß W (2019)


Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2019

Journal

Book Volume: 29

Article Number: 1807964

Journal Issue: 14

DOI: 10.1002/adfm.201807964

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.

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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, 29(14). https://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 29.14 (2019).

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