Effects of the Addition of Tin Powder to Perovskite Precursor Solutions on Band Bending at PEDOT:PSS/Perovskite Interfaces in Mixed-Cation Mixed-Halide Tin Perovskite Solar Cells

Wang, Yihuang; Yamaguchi, Seira; Motohashi, Mayu; Kimata, Haru; Xue, Dong; Zou, Xiangtao; Saeki, Akinori; Nakamura, Tomoya; Wakamiya, Atsushi; Marumoto, Kazuhiro

doi:10.1021/acs.jpclett.4c00797

J. Phys. Chem. Lett.

2024

DOI: 10.1021/acs.jpclett.4c00797

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Effects of the Addition of Tin Powder to Perovskite Precursor Solutions on Band Bending at PEDOT:PSS/Perovskite Interfaces in Mixed-Cation Mixed-Halide Tin Perovskite Solar Cells

Yihuang Wang,

Seira Yamaguchi,

Mayu Motohashi

et al.

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

Cai,

Maxwell,

et al. 2024

Advanced Materials

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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.

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

Cai,

Maxwell,

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

show abstract

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Effects of the Addition of Tin Powder to Perovskite Precursor Solutions on Band Bending at PEDOT:PSS/Perovskite Interfaces in Mixed-Cation Mixed-Halide Tin Perovskite Solar Cells

Cited by 1 publication

References 37 publications

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

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

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