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Dual-mode narrowband organic photodetectors for self-aligned imaging in NIR-I and NIR-II

Author

Listed:
  • Yu Tang

    (Hong Kong Baptist University)

  • Zhuangmiao Wang

    (Hong Kong Baptist University)

  • Mingsheng Gao

    (Hong Kong Baptist University)

  • Jiayin Han

    (Hong Kong Baptist University)

  • Leiming Yuan

    (Hong Kong Baptist University
    Wenzhou University)

  • Furong Zhu

    (Hong Kong Baptist University)

Abstract

The ability to detect and image in the near-infrared (NIR) regions, specifically NIR-I (700–900 nm) and NIR-II (1000–1700 nm), is crucial for medical diagnostics and bioimaging due to their exceptional tissue penetration and absorption characteristics. Organic photodetectors (OPDs) present a promising solution for self-aligned imaging in these regions, due to their tunable optoelectronic properties and flexible fabrication processes. However, achieving high-performance dual-mode narrowband OPDs for NIR-I and NIR-II detection remains a significant challenge due to the inherently broadband nature of most organic semiconductor materials. In this study, we introduce a bias-switchable dual-mode narrowband OPD with a back-to-back stacked charge collection narrowing/photodiode-type double bulk heterojunction (BHJ) architecture. The dual-mode narrowband OPD exhibits excellent wavelength selectivity and enhanced imaging capabilities, facilitating self-aligned imaging in both NIR-I and NIR-II regions. Additionally, the double BHJ architecture provides design flexibility, allowing for the realization of dual-mode narrowband responses through various BHJ configurations.

Suggested Citation

  • Yu Tang & Zhuangmiao Wang & Mingsheng Gao & Jiayin Han & Leiming Yuan & Furong Zhu, 2025. "Dual-mode narrowband organic photodetectors for self-aligned imaging in NIR-I and NIR-II," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62394-6
    DOI: 10.1038/s41467-025-62394-6
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    References listed on IDEAS

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    1. 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.
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