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Evidence for ion migration in hybrid perovskite solar cells with minimal hysteresis

Author

Listed:
  • Philip Calado

    (Imperial College London
    Centre for Plastic Electronics, Imperial College London)

  • Andrew M. Telford

    (Imperial College London)

  • Daniel Bryant

    (Imperial College London
    SPECIFIC, Swansea University)

  • Xiaoe Li

    (Imperial College London)

  • Jenny Nelson

    (Imperial College London
    Centre for Plastic Electronics, Imperial College London
    Imperial College London)

  • Brian C. O’Regan

    (Sunlight Scientific)

  • Piers R.F. Barnes

    (Imperial College London
    Centre for Plastic Electronics, Imperial College London)

Abstract

Ion migration has been proposed as a possible cause of photovoltaic current–voltage hysteresis in hybrid perovskite solar cells. A major objection to this hypothesis is that hysteresis can be reduced by changing the interfacial contact materials; however, this is unlikely to significantly influence the behaviour of mobile ionic charge within the perovskite phase. Here, we show that the primary effects of ion migration can be observed regardless of whether the contacts were changed to give devices with or without significant hysteresis. Transient optoelectronic measurements combined with device simulations indicate that electric-field screening, consistent with ion migration, is similar in both high and low hysteresis CH3NH3PbI3 cells. Simulation of the photovoltage and photocurrent transients shows that hysteresis requires the combination of both mobile ionic charge and recombination near the perovskite-contact interfaces. Passivating contact recombination results in higher photogenerated charge concentrations at forward bias which screen the ionic charge, reducing hysteresis.

Suggested Citation

  • Philip Calado & Andrew M. Telford & Daniel Bryant & Xiaoe Li & Jenny Nelson & Brian C. O’Regan & Piers R.F. Barnes, 2016. "Evidence for ion migration in hybrid perovskite solar cells with minimal hysteresis," Nature Communications, Nature, vol. 7(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13831
    DOI: 10.1038/ncomms13831
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    Cited by:

    1. Rodolfo López-Vicente & José Abad & Javier Padilla & Antonio Urbina, 2021. "Assessment of Molecular Additives on the Lifetime of Carbon-Based Mesoporous Perovskite Solar Cells," Energies, MDPI, vol. 14(7), pages 1-12, April.
    2. Maurizia Palummo & Daniele Varsano & Eduardo Berríos & Koichi Yamashita & Giacomo Giorgi, 2020. "Halide Pb-Free Double–Perovskites: Ternary vs. Quaternary Stoichiometry," Energies, MDPI, vol. 13(14), pages 1-28, July.
    3. Jarla Thiesbrummel & Sahil Shah & Emilio Gutierrez-Partida & Fengshuo Zu & Francisco Peña-Camargo & Stefan Zeiske & Jonas Diekmann & Fangyuan Ye & Karol P. Peters & Kai O. Brinkmann & Pietro Capriogli, 2024. "Ion-induced field screening as a dominant factor in perovskite solar cell operational stability," Nature Energy, Nature, vol. 9(6), pages 664-676, June.
    4. Taewan Kim & Jongchul Lim & Seulki Song, 2020. "Recent Progress and Challenges of Electron Transport Layers in Organic–Inorganic Perovskite Solar Cells," Energies, MDPI, vol. 13(21), pages 1-16, October.

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