Ion-induced field screening as a dominant factor in perovskite solar cell operational stability

Thiesbrummel J, Shah S, Gutierrez-Partida E, Zu F, Peña-Camargo F, Zeiske S, Diekmann J, Ye F, Peters KP, Brinkmann KO, Caprioglio P, Dasgupta A, Seo S, Adeleye FA, Warby J, Jeangros Q, Lang F, Zhang S, Albrecht S, Riedl T, Armin A, Neher D, Koch N, Wu Y, Le Corre VM, Snaith H, Stolterfoht M (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Nature Energy Nature Publishing Group

DOI: 10.1038/s41560-024-01487-w

Abstract

The presence of mobile ions in metal halide perovskites has been shown to adversely affect the intrinsic stability of perovskite solar cells (PSCs). However, the actual contribution of mobile ions to the total degradation loss compared with other factors such as trap-assisted recombination remains poorly understood. Here we reveal that mobile ion-induced internal field screening is the dominant factor in the degradation of PSCs under operational conditions. The increased field screening leads to a decrease in the steady-state efficiency, often owing to a large reduction in the current density. Instead, the efficiency at high scan speeds (>1,000 V s−1), where the ions are immobilized, is much less affected. We also show that the bulk and interface quality do not degrade upon ageing, yet the open-circuit voltage decreases owing to an increase in the mobile ion density. This work reveals the importance of ionic losses for intrinsic PSC degradation before chemical or extrinsic mechanical effects manifest.

Authors with CRIS profile

Vincent Marc Le Corre Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Swansea University GB United Kingdom (GB) Universität Potsdam DE Germany (DE) Humboldt-Universität zu Berlin DE Germany (DE) Bergische Universität Wuppertal DE Germany (DE) University of Oxford GB United Kingdom (GB) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Centre Suisse d’Electronique et de Microtechnique CSEM SA CH Switzerland (CH)

How to cite

APA:

Thiesbrummel, J., Shah, S., Gutierrez-Partida, E., Zu, F., Peña-Camargo, F., Zeiske, S.,... Stolterfoht, M. (2024). Ion-induced field screening as a dominant factor in perovskite solar cell operational stability. Nature Energy. https://dx.doi.org/10.1038/s41560-024-01487-w

MLA:

Thiesbrummel, Jarla, et al. "Ion-induced field screening as a dominant factor in perovskite solar cell operational stability." Nature Energy (2024).

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