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Enhancing sub-bandgap external quantum efficiency by photomultiplication for narrowband organic near-infrared photodetectors

Author

Listed:
  • Jonas Kublitski

    (Technische Universität Dresden)

  • Axel Fischer

    (Technische Universität Dresden)

  • Shen Xing

    (Technische Universität Dresden)

  • Lukasz Baisinger

    (Technische Universität Dresden)

  • Eva Bittrich

    (Leibniz-Institut für Polymerforschung Dresden e.V.)

  • Donato Spoltore

    (Technische Universität Dresden)

  • Johannes Benduhn

    (Technische Universität Dresden)

  • Koen Vandewal

    (Hasselt University)

  • Karl Leo

    (Technische Universität Dresden
    Technische Universität Dresden)

Abstract

Detection of electromagnetic signals for applications such as health, product quality monitoring or astronomy requires highly responsive and wavelength selective devices. Photomultiplication-type organic photodetectors have been shown to achieve high quantum efficiencies mainly in the visible range. Much less research has been focused on realizing near-infrared narrowband devices. Here, we demonstrate fully vacuum-processed narrow- and broadband photomultiplication-type organic photodetectors. Devices are based on enhanced hole injection leading to a maximum external quantum efficiency of almost 2000% at −10 V for the broadband device. The photomultiplicative effect is also observed in the charge-transfer state absorption region. By making use of an optical cavity device architecture, we enhance the charge-transfer response and demonstrate a wavelength tunable narrowband photomultiplication-type organic photodetector with external quantum efficiencies superior to those of pin-devices. The presented concept can further improve the performance of photodetectors based on the absorption of charge-transfer states, which were so far limited by the low external quantum efficiency provided by these devices.

Suggested Citation

  • Jonas Kublitski & Axel Fischer & Shen Xing & Lukasz Baisinger & Eva Bittrich & Donato Spoltore & Johannes Benduhn & Koen Vandewal & Karl Leo, 2021. "Enhancing sub-bandgap external quantum efficiency by photomultiplication for narrowband organic near-infrared photodetectors," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24500-2
    DOI: 10.1038/s41467-021-24500-2
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    References listed on IDEAS

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    1. Ardalan Armin & Ross D. Jansen-van Vuuren & Nikos Kopidakis & Paul L. Burn & Paul Meredith, 2015. "Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes," Nature Communications, Nature, vol. 6(1), pages 1-8, May.
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