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; Yicheng Zhao

doi:10.1038/s41467-024-46145-7

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

Nat Commun. 2024 Mar 5;15(1):2002. doi: 10.1038/s41467-024-46145-7.

Authors

Junsheng Luo^#^{1

2

3}, Bowen Liu^#², Haomiao Yin¹, Xin Zhou⁴, Mingjian Wu⁴, Hongyang Shi², Jiyun Zhang^{2

5}, Jack Elia², Kaicheng Zhang², Jianchang Wu^{2

5}, Zhiqiang Xie², Chao Liu^{2

5}, Junyu Yuan³, Zhongquan Wan^{6

7}, Thomas Heumueller^{2

5}, Larry Lüer^{2

5}, Erdmann Spiecker⁴, Ning Li^{2

5

8}, Chunyang Jia^{9

10}, Christoph J Brabec^{11

12}, Yicheng Zhao^{13

14}

Affiliations

¹ National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, PR China.
² Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science, Friedrich-Alexander University Erlangen-Nürnberg, Martensstr. 7, 91058, Erlangen, Germany.
³ Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, PR China.
⁴ Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), Department of Materials Science, FriedrichAlexander-Universität Erlangen-Nürnberg, Cauerstr. 3, D-91058, Erlangen, Germany.
⁵ Helmholtz-Institute Erlangen-Nürnberg (HI-ERN), Immerwahrstr. 2, 91058, Erlangen, Germany.
⁶ National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, PR China. zqwan@uestc.edu.cn.
⁷ Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, PR China. zqwan@uestc.edu.cn.
⁸ Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 510640, Guangzhou, PR China.
⁹ National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, PR China. cyjia@uestc.edu.cn.
¹⁰ Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, 518110, Shenzhen, PR China. cyjia@uestc.edu.cn.
¹¹ Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science, Friedrich-Alexander University Erlangen-Nürnberg, Martensstr. 7, 91058, Erlangen, Germany. christoph.brabec@fau.de.
¹² Helmholtz-Institute Erlangen-Nürnberg (HI-ERN), Immerwahrstr. 2, 91058, Erlangen, Germany. christoph.brabec@fau.de.
¹³ National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, 611731, Chengdu, PR China. zhaoyicheng@uestc.edu.cn.
¹⁴ Helmholtz-Institute Erlangen-Nürnberg (HI-ERN), Immerwahrstr. 2, 91058, Erlangen, Germany. zhaoyicheng@uestc.edu.cn.

^# Contributed equally.

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.

Abstract

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