Polymer-acid-metal quasi-ohmic contact for stable perovskite solar cells beyond a 20,000-hour extrapolated lifetime

Junsheng Luo, Bowen Liu, Haomiao Yin, Xin Zhou, Mingjian Wu, Hongyang Shi, Jiyun Zhang, Jack Elia, Kaicheng Zhang, Jianchang Wu, Zhiqiang Xie, Chao Liu, Junyu Yuan, Zhongquan Wan (), Thomas Heumueller, Larry Lüer, Erdmann Spiecker, Ning Li, Chunyang Jia (), Christoph J. Brabec () and Yicheng Zhao ()
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Junsheng Luo: University of Electronic Science and Technology of China
Bowen Liu: Friedrich-Alexander University Erlangen-Nürnberg
Haomiao Yin: University of Electronic Science and Technology of China
Xin Zhou: FriedrichAlexander-Universität Erlangen-Nürnberg
Mingjian Wu: FriedrichAlexander-Universität Erlangen-Nürnberg
Hongyang Shi: Friedrich-Alexander University Erlangen-Nürnberg
Jiyun Zhang: Friedrich-Alexander University Erlangen-Nürnberg
Jack Elia: Friedrich-Alexander University Erlangen-Nürnberg
Kaicheng Zhang: Friedrich-Alexander University Erlangen-Nürnberg
Jianchang Wu: Friedrich-Alexander University Erlangen-Nürnberg
Zhiqiang Xie: Friedrich-Alexander University Erlangen-Nürnberg
Chao Liu: Friedrich-Alexander University Erlangen-Nürnberg
Junyu Yuan: University of Electronic Science and Technology of China
Zhongquan Wan: University of Electronic Science and Technology of China
Thomas Heumueller: Friedrich-Alexander University Erlangen-Nürnberg
Larry Lüer: Friedrich-Alexander University Erlangen-Nürnberg
Erdmann Spiecker: FriedrichAlexander-Universität Erlangen-Nürnberg
Ning Li: Friedrich-Alexander University Erlangen-Nürnberg
Chunyang Jia: University of Electronic Science and Technology of China
Christoph J. Brabec: Friedrich-Alexander University Erlangen-Nürnberg
Yicheng Zhao: University of Electronic Science and Technology of China

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: 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.

Date: 2024
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DOI: 10.1038/s41467-024-46145-7

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