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Dual-band infrared imaging using stacked colloidal quantum dot photodiodes

Nature photonics, 2019-04, Vol.13 (4), p.277-282 [Peer Reviewed Journal]

2019© The Author(s), under exclusive licence to Springer Nature Limited 2019 ;ISSN: 1749-4885 ;EISSN: 1749-4893 ;DOI: 10.1038/s41566-019-0362-1

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  • Title:
    Dual-band infrared imaging using stacked colloidal quantum dot photodiodes
  • Author: Tang, Xin ; Ackerman, Matthew M. ; Chen, Menglu ; Guyot-Sionnest, Philippe
  • Subjects: Bias ; Cameras ; Colloiding ; Cryogenic temperature ; Electronics industry ; Infrared imaging ; Optoelectronic devices ; Photodiodes ; Polarity ; Quantum dots ; Remote monitoring ; Sensors ; Short wave radiation ; Spectra ; Spectral sensitivity
  • Is Part Of: Nature photonics, 2019-04, Vol.13 (4), p.277-282
  • Description: Infrared multispectral imaging is attracting great interest with the increasing demand for sensitive, low-cost and scalable devices that can distinguish coincident spectral information. However, the widespread use of such detectors is still limited by the high cost of epitaxial semiconductors. In contrast, the solution processability and wide spectral tunability of colloidal quantum dots (CQDs) have inspired various inexpensive, high-performance optoelectronic devices. Here, we demonstrate a two-terminal CQD dual-band detector, which provides a bias-switchable spectral response in two distinct bands. A vertical stack of two rectifying junctions in a back-to-back diode configuration is created by engineering a strong and spatially stable doping process. By controlling the bias polarity and magnitude, the detector can be rapidly switched between short-wave infrared and mid-wave infrared at modulation frequencies up to 100 kHz with D* above 1010 jones at cryogenic temperature. The detector performance is illustrated by dual-band infrared imaging and remote temperature monitoring.Colloidal quantum dot detectors, switchable between short-wave infrared and mid-wave infrared, are demonstrated.
  • Publisher: London: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 1749-4885
    EISSN: 1749-4893
    DOI: 10.1038/s41566-019-0362-1
  • Source: ProQuest Central
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