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. 2024 Nov;36(46):e2411968.
doi: 10.1002/adma.202411968. Epub 2024 Sep 23.

Multi-Functional Silole Hole Transport Layer for Efficient and Stable Lead-Tin Perovskite and Tandem Solar Cells

Yuanjing Cai  1   2 , Aidan Maxwell  2 , Chongwen Li  2 , Eui Dae Jung  2 , Lewei Zeng  2 , Boran Kumral  3 , Peter Serles  3 , Zhan'ao Tan  1 , Runnan Yu  1 , Salvatore Boccia  4 , Mingxing Chen  5 , Cheng Jiang  6 , Dongcheng Chen  6 , Yanjiang Liu  2 , Zaiwei Wang  2 , Luke Grater  2
Affiliations

Multi-Functional Silole Hole Transport Layer for Efficient and Stable Lead-Tin Perovskite and Tandem Solar Cells

Yuanjing Cai et al. Adv Mater. 2024 Nov.

Abstract

Despite high theoretical efficiencies and rapid improvements in performance, high-efficiency ≈1.2 eV mixed Sn-Pb perovskite solar cells (PSCs) generally rely on poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT: PSS) as the hole transport layer (HTL); a material that is considered to be a bottleneck for long-term stability due to its acidity and hygroscopic nature. Seeking to replace PEDOT: PSS with an alternative HTL with improved atmospheric and thermal stability, herein, a silole derivative (Silole-COOH) tuned with optimal electronic properties and efficient carrier transport by incorporating a carboxyl functional group is designed, which results in an optimal band alignment for hole extraction from Sn-Pb perovskites and robust air and thermal stability. Thin films composed of the Silole-COOH exhibit superior conductivity and carrier mobility compared to PEDOT: PSS, in addition to reduced nonradiative quasi-Fermi-level splitting losses at the HTL/perovskite interface and improved quality of Sn-Pb perovskite. Replacement of PEDOT: PSS with Silole-COOH leads to 23.2%-efficient single-junction Sn-Pb PSCs, 25.8%-efficient all-perovskite tandems, and long operating stability in ambient air.

Keywords: Sn–Pb perovskites; hole transport materials; siloles; solar cells.

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References

    1. S. D. Stranks, H. J. Snaith, Nat. Nanotech. 2015, 10, 391.
    1. A. K. Jena, A. Kulkarni, T. Miyasaka, Chem. Rev. 2019, 119, 3036.
    1. M. T. Klug, R. L. Milot, J. B. Patel, T. Green, H. C. Sansom, M. D. Farrar, A. J. Ramadan, S. Martani, Z. Wang, B. Wenger, J. M. Ball, L. Langshaw, A. Petrozza, M. B. Johnston, L. M. Herz, H. J. Snaith, Energy Environ. Sci. 2020, 13, 1776.
    1. R. Lin, J. Xu, M. Wei, Y. Wang, Z. Qin, Z. Liu, J. Wu, K. Xiao, B. Chen, S. M. Park, G. Chen, H. R. Atapattu, K. R. Graham, J. Xu, J. Zhu, L. Li, C. Zhang, E. H. Sargent, H. Tan, Nature 2022, 603, 73.
    1. H. Chen, A. Maxwell, C. Li, S. Teale, B. Chen, T. Zhu, E. Ugur, G. Harrison, L. Grater, J. Wang, Z. Wang, L. Zeng, S. M. Park, L. Chen, P. Serles, R. A. Awni, B. Subedi, X. Zheng, C. Xiao, N. J. Podraza, T. Filleter, C. Liu, Y. Yang, J. M. Luther, S. D. Wolf, M. G. Kanatzidis, Y. Yan, E. H. Sargent, Nature 2022, 613, 676.

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