Journal Article

FZJ-2024-02770

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Polymer-acid-metal quasi-ohmic contact for stable perovskite solar cells beyond a 20,000-hour extrapolated lifetime

Luo, J. ; Liu, B. ; Yin, H. ; Zhou, X. ; Wu, M. ; Shi, H. ; Zhang, J.FZJ* ; Elia, J. ; Zhang, K. ; Wu, J.FZJ* ; Xie, Z. ; Liu, C.FZJ* ; Yuan, J. ; Wan, Z. (Corresponding author) ; Heumueller, T.FZJ* ; Lüer, L. ; Spiecker, E. ; Li, N. ; Jia, C. (Corresponding author) ; Brabec, C. J. (Corresponding author)FZJ* ; Zhao, Y. (Corresponding author)

2024
Nature Publishing Group UK [London]

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Please use a persistent id in citations: doi:10.1038/s41467-024-46145-7  doi:10.34734/FZJ-2024-02770

Abstract: The development of a robust quasi-ohmic contact with minimal resistance, good stability and cost-effectiveness is crucial for perovskite solar cells. We introduce a generic approach featuring a Lewis-acid layer sandwiched between dopant-free semicrystalline polymer and metal electrode in perovskite solar cells, resulting in an ideal quasi-ohmic contact even at elevated temperature up to 85 °C. The solubility of Lewis acid in alcohol facilitates nondestructive solution processing on top of polymer, which boosts hole injection from polymer into metal by two orders of magnitude. By integrating the polymer-acid-metal structure into solar cells, devices exhibit remarkable resilience, retaining 96% ± 3%, 96% ± 2% and 75% ± 7% of their initial efficiencies after continuous operation in nitrogen at 35 °C for 2212 h, 55 °C for 1650 h and 85 °C for 937 h, respectively. Leveraging the Arrhenius relation, we project an impressive T80 lifetime of 26,126 h at 30 °C.

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Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)

Research Program(s):

1. 1213 - Cell Design and Development (POF4-121) (POF4-121)
2. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2024

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