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Organic narrowband near-infrared photodetectors based on intermolecular charge-transfer absorption

Author

Listed:
  • Bernhard Siegmund

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Andreas Mischok

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Johannes Benduhn

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Olaf Zeika

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Sascha Ullbrich

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Frederik Nehm

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Matthias Böhm

    (Institute for Applied Physics, Technische Universität Dresden)

  • Donato Spoltore

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Hartmut Fröb

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Christian Körner

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Karl Leo

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

  • Koen Vandewal

    (Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden
    Institute for Applied Physics, Technische Universität Dresden)

Abstract

Blending organic electron donors and acceptors yields intermolecular charge-transfer states with additional optical transitions below their optical gaps. In organic photovoltaic devices, such states play a crucial role and limit the operating voltage. Due to its extremely weak nature, direct intermolecular charge-transfer absorption often remains undetected and unused for photocurrent generation. Here, we use an optical microcavity to increase the typically negligible external quantum efficiency in the spectral region of charge-transfer absorption by more than 40 times, yielding values over 20%. We demonstrate narrowband detection with spectral widths down to 36 nm and resonance wavelengths between 810 and 1,550 nm, far below the optical gap of both donor and acceptor. The broad spectral tunability via a simple variation of the cavity thickness makes this innovative, flexible and potentially visibly transparent device principle highly suitable for integrated low-cost spectroscopic near-infrared photodetection.

Suggested Citation

  • Bernhard Siegmund & Andreas Mischok & Johannes Benduhn & Olaf Zeika & Sascha Ullbrich & Frederik Nehm & Matthias Böhm & Donato Spoltore & Hartmut Fröb & Christian Körner & Karl Leo & Koen Vandewal, 2017. "Organic narrowband near-infrared photodetectors based on intermolecular charge-transfer absorption," Nature Communications, Nature, vol. 8(1), pages 1-6, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15421
    DOI: 10.1038/ncomms15421
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    Cited by:

    1. Wenjie Deng & Zilong Zheng & Jingzhen Li & Rongkun Zhou & Xiaoqing Chen & Dehui Zhang & Yue Lu & Chongwu Wang & Congya You & Songyu Li & Ling Sun & Yi Wu & Xuhong Li & Boxing An & Zheng Liu & Qi jie W, 2022. "Electrically tunable two-dimensional heterojunctions for miniaturized near-infrared spectrometers," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Kai Müller & Karl S. Schellhammer & Nico Gräßler & Bipasha Debnath & Fupin Liu & Yulia Krupskaya & Karl Leo & Martin Knupfer & Frank Ortmann, 2023. "Directed exciton transport highways in organic semiconductors," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Quan Liu & Stefan Zeiske & Xueshi Jiang & Derese Desta & Sigurd Mertens & Sam Gielen & Rachith Shanivarasanthe & Hans-Gerd Boyen & Ardalan Armin & Koen Vandewal, 2022. "Electron-donating amine-interlayer induced n-type doping of polymer:nonfullerene blends for efficient narrowband near-infrared photo-detection," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    4. Xiaopeng Feng & Chenglong Li & Jinmei Song & Yuhong He & Wei Qu & Weijun Li & Keke Guo & Lulu Liu & Bai Yang & Haotong Wei, 2024. "Differential perovskite hemispherical photodetector for intelligent imaging and location tracking," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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