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Suppressing Halide Segregation Via Dual-Anchoring Strategy for 31.20% Perovskite/Silicon Tandem Solar Cells

Du, Hao ; Li, Jiawen ; Ma, Zhu ; Zhang, Qian ; Gou, Fuchun ; Li, Yixian ; Chen, Bo ; Lv, Zhuo ; Xiang, Dengqian and Hou, Shanyue , et al. (2025) In Advanced Energy Materials
Abstract

The efficiency and stability of wide bandgap (WBG) perovskite solar cells (PSCs) are constrained by photo-induced halide segregation and severe non-radiative recombination, which significantly impedes the advancement of high-efficiency and stable perovskite/silicon tandem solar cells (PSTSCs). In this work, a potassium 4-sulfonic-1,8-naphthalic anhydride salt (4S-NAPS), featuring dual-anchoring sites, is incorporated into the perovskite precursor. The sulfonic group (─SO3−) and carbonyl group (C═O) interact with uncoordinated Pb2+ ions on the perovskite surface. In addition, K⁺ ions occupy interstitial sites within the crystal lattice, thereby effectively enhancing the ion migration barrier and... (More)

The efficiency and stability of wide bandgap (WBG) perovskite solar cells (PSCs) are constrained by photo-induced halide segregation and severe non-radiative recombination, which significantly impedes the advancement of high-efficiency and stable perovskite/silicon tandem solar cells (PSTSCs). In this work, a potassium 4-sulfonic-1,8-naphthalic anhydride salt (4S-NAPS), featuring dual-anchoring sites, is incorporated into the perovskite precursor. The sulfonic group (─SO3−) and carbonyl group (C═O) interact with uncoordinated Pb2+ ions on the perovskite surface. In addition, K⁺ ions occupy interstitial sites within the crystal lattice, thereby effectively enhancing the ion migration barrier and suppressing halide phase separation. Owing to the dual-anchoring effect of 4S-NAPS, a single-junction WBG PSC (1.68 eV) delivers a power conversion efficiency (PCE) of 22.95% and an open-circuit voltage (VOC) of 1.26 V, representing one of the highest efficiencies reported for WBG PSCs. Moreover, the unencapsulated modified devices retain 90% of initial efficiency after 3000 h in a nitrogen atmosphere, demonstrating remarkable operational stability. Notably, the fabricated monolithic PSTSC achieves a PCE of 31.20%, a VOC of 1.950 V, and exhibits negligible hysteresis. This dual-anchoring strategy provides a promising avenue for fabricating highly efficient and stable WBG PSCs and offers new insights into achieving superior performance in PSTSCs.

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publishing date
type
Contribution to journal
publication status
epub
subject
keywords
dual-anchoring strategy, halide segregation, high efficiency, perovskite/silicon tandem solar cells, wide-bandgap perovskite
in
Advanced Energy Materials
publisher
Wiley-Blackwell
external identifiers
  • scopus:105017842561
ISSN
1614-6832
DOI
10.1002/aenm.202503565
language
English
LU publication?
yes
id
079e72a9-3444-4bf9-a7b5-5960f2879ac1
date added to LUP
2025-12-05 14:31:45
date last changed
2025-12-05 14:32:52
@article{079e72a9-3444-4bf9-a7b5-5960f2879ac1,
  abstract     = {{<p>The efficiency and stability of wide bandgap (WBG) perovskite solar cells (PSCs) are constrained by photo-induced halide segregation and severe non-radiative recombination, which significantly impedes the advancement of high-efficiency and stable perovskite/silicon tandem solar cells (PSTSCs). In this work, a potassium 4-sulfonic-1,8-naphthalic anhydride salt (4S-NAPS), featuring dual-anchoring sites, is incorporated into the perovskite precursor. The sulfonic group (─SO<sub>3</sub><sup>−</sup>) and carbonyl group (C═O) interact with uncoordinated Pb<sup>2+</sup> ions on the perovskite surface. In addition, K⁺ ions occupy interstitial sites within the crystal lattice, thereby effectively enhancing the ion migration barrier and suppressing halide phase separation. Owing to the dual-anchoring effect of 4S-NAPS, a single-junction WBG PSC (1.68 eV) delivers a power conversion efficiency (PCE) of 22.95% and an open-circuit voltage (V<sub>OC</sub>) of 1.26 V, representing one of the highest efficiencies reported for WBG PSCs. Moreover, the unencapsulated modified devices retain 90% of initial efficiency after 3000 h in a nitrogen atmosphere, demonstrating remarkable operational stability. Notably, the fabricated monolithic PSTSC achieves a PCE of 31.20%, a V<sub>OC</sub> of 1.950 V, and exhibits negligible hysteresis. This dual-anchoring strategy provides a promising avenue for fabricating highly efficient and stable WBG PSCs and offers new insights into achieving superior performance in PSTSCs.</p>}},
  author       = {{Du, Hao and Li, Jiawen and Ma, Zhu and Zhang, Qian and Gou, Fuchun and Li, Yixian and Chen, Bo and Lv, Zhuo and Xiang, Dengqian and Hou, Shanyue and Chen, Yi and Du, Zhuowei and You, Wei and Yang, Junbo and Zheng, Shenshen and Huang, Cheng and Zhang, Fengying and Yu, Jian and Xiang, Yan and Zheng, Kaibo and Lin, Zedong and Feng, Wenyong and Hu, Yuchao and Zhang, Yifeng and Long, Wei and Xing, Guoqiang}},
  issn         = {{1614-6832}},
  keywords     = {{dual-anchoring strategy; halide segregation; high efficiency; perovskite/silicon tandem solar cells; wide-bandgap perovskite}},
  language     = {{eng}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Advanced Energy Materials}},
  title        = {{Suppressing Halide Segregation Via Dual-Anchoring Strategy for 31.20% Perovskite/Silicon Tandem Solar Cells}},
  url          = {{http://dx.doi.org/10.1002/aenm.202503565}},
  doi          = {{10.1002/aenm.202503565}},
  year         = {{2025}},
}