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Two-dimensional Perovskitoids Enhance Stability in Perovskite Solar Cells

Nature (2024)Cite this article

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Abstract

Two-dimensional (2D)/three-dimensional (3D) perovskite heterostructures have played a key role in advancing the performance of perovskite solar cells (PSCs)1,2. However, the migration of cations between 2D and 3D layers results in the disruption of octahedral networks that leads to degradation in performance over time3,4. We hypothesized that perovskitoids, with robust organic-inorganic networks enabled by edge- and face-sharing, could impede ion migration. We explored a set of perovskitoids of varying dimensionality, and found that cation migration within perovskitoid/perovskite heterostructures was suppressed compared to the 2D/3D perovskite case. Increasing the dimensionality of perovskitoids improves charge transport when they are interfaced with 3D perovskite surfaces – this the result of enhanced octahedral connectivity and out-of-plane orientation. The 2D perovskitoid (A6BfP)8Pb7I22 (A6BfP: N-aminohexyl-benz[f]-phthalimide) provides efficient passivation of perovskite surfaces and enables uniform large-area perovskite films. Devices based on perovskitoid/perovskite heterostructures achieve a certified quasi-steady-state power conversion efficiency of 24.6% for centimeter-area PSCs. We removed the fragile hole transport layers and showed stable operation of the underlying perovskitoid/perovskite heterostructure at 85°C for 1,250 hours for encapsulated large-area devices in an air ambient.

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Author notes

  1. These authors contributed equally: Cheng Liu, Yi Yang, Hao Chen, Ioannis Spanopoulos, Abdulaziz S. R. Bati

Authors and Affiliations

  1. Department of Chemistry, Northwestern University, 2145 Sheridan Rd, Evanston, Illinois, USA

    Cheng Liu, Yi Yang, Hao Chen, Ioannis Spanopoulos, Abdulaziz S. R. Bati, Isaiah W. Gilley, Jianhua Chen, Robert P. Reynolds, Taylor E. Wiggins, Chuying Huang, Jared Fletcher, Lin X. Chen, Bin Chen, Ding Zheng, Tobin J. Marks, Antonio Facchetti, Edward H. Sargent & Mercouri G. Kanatzidis

  2. Department of Chemistry, University of South Florida, Tampa, Florida, USA

    Ioannis Spanopoulos

  3. Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario, Canada

    Aidan Maxwell, Zaiwei Wang & Edward H. Sargent

  4. KAUST Solar Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia

    Badri Vishal & Stefaan De Wolf

  5. Department of Electrical and Computer Engineering, Northwestern University, 2145 Sheridan Rd, Evanston, Illinois, USA

    Yuan Liu & Edward H. Sargent

  6. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr NW, Atlanta, Georgia, USA

    Antonio Facchetti

Authors
  1. Cheng Liu
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  2. Yi Yang
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  3. Hao Chen
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  4. Ioannis Spanopoulos
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  5. Abdulaziz S. R. Bati
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  6. Isaiah W. Gilley
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  7. Jianhua Chen
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  8. Aidan Maxwell
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  9. Badri Vishal
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  10. Robert P. Reynolds
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  12. Zaiwei Wang
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  13. Chuying Huang
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  14. Jared Fletcher
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  15. Yuan Liu
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  16. Lin X. Chen
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  17. Stefaan De Wolf
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  18. Bin Chen
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  19. Ding Zheng
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  20. Tobin J. Marks
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  21. Antonio Facchetti
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  22. Edward H. Sargent
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  23. Mercouri G. Kanatzidis
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Corresponding authors

Correspondence to Ding Zheng, Tobin J. Marks, Antonio Facchetti, Edward H. Sargent or Mercouri G. Kanatzidis.

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Supplementary Information

This file contains Supplementary Text; Supplementary Figures 1-29: Supplementary Tables 1-11 and Supplementary References 1-21.

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Cite this article

Liu, C., Yang, Y., Chen, H. et al. Two-dimensional Perovskitoids Enhance Stability in Perovskite Solar Cells. Nature (2024). https://doi.org/10.1038/s41586-024-07764-8

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  • DOI: https://doi.org/10.1038/s41586-024-07764-8

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