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Ultralow dark current in near-infrared perovskite photodiodes by reducing charge injection and interfacial charge generation

Author

Listed:
  • Riccardo Ollearo

    (Eindhoven University of Technology)

  • Junke Wang

    (Eindhoven University of Technology)

  • Matthew J. Dyson

    (Eindhoven University of Technology)

  • Christ H. L. Weijtens

    (Eindhoven University of Technology)

  • Marco Fattori

    (Eindhoven University of Technology)

  • Bas T. Gorkom

    (Eindhoven University of Technology)

  • Albert J. J. M. Breemen

    (TNO at Holst Centre)

  • Stefan C. J. Meskers

    (Eindhoven University of Technology)

  • René A. J. Janssen

    (Eindhoven University of Technology
    Dutch Institute for Fundamental Energy Research)

  • Gerwin H. Gelinck

    (Eindhoven University of Technology
    TNO at Holst Centre)

Abstract

Metal halide perovskite photodiodes (PPDs) offer high responsivity and broad spectral sensitivity, making them attractive for low-cost visible and near-infrared sensing. A significant challenge in achieving high detectivity in PPDs is lowering the dark current density (JD) and noise current (in). This is commonly accomplished using charge-blocking layers to reduce charge injection. By analyzing the temperature dependence of JD for lead-tin based PPDs with different bandgaps and electron-blocking layers (EBL), we demonstrate that while EBLs eliminate electron injection, they facilitate undesired thermal charge generation at the EBL-perovskite interface. The interfacial energy offset between the EBL and the perovskite determines the magnitude and activation energy of JD. By increasing this offset we realized a PPD with ultralow JD and in of 5 × 10−8 mA cm−2 and 2 × 10−14 A Hz−1/2, respectively, and wavelength sensitivity up to 1050 nm, establishing a new design principle to maximize detectivity in perovskite photodiodes.

Suggested Citation

  • Riccardo Ollearo & Junke Wang & Matthew J. Dyson & Christ H. L. Weijtens & Marco Fattori & Bas T. Gorkom & Albert J. J. M. Breemen & Stefan C. J. Meskers & René A. J. Janssen & Gerwin H. Gelinck, 2021. "Ultralow dark current in near-infrared perovskite photodiodes by reducing charge injection and interfacial charge generation," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-27565-1
    DOI: 10.1038/s41467-021-27565-1
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    1. Yingjie Tang & Peng Jin & Yan Wang & Dingwei Li & Yitong Chen & Peng Ran & Wei Fan & Kun Liang & Huihui Ren & Xuehui Xu & Rui Wang & Yang (Michael) Yang & Bowen Zhu, 2023. "Enabling low-drift flexible perovskite photodetectors by electrical modulation for wearable health monitoring and weak light imaging," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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