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Self-assembling monolayer-assisted perovskite growth enable high-performance solar cells
  • +7
  • Jun Li,
  • Lisha Xie,
  • Shuncheng Yang,
  • Xinyu Tong,
  • Zhenwei Pu,
  • Mengjin Yang,
  • Yujie Wu,
  • Daobin Yang,
  • Tao Wang,
  • Ziyi Ge
Jun Li
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Lisha Xie
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Shuncheng Yang
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Xinyu Tong
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Zhenwei Pu
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Mengjin Yang
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Yujie Wu
Zhejiang Sci-Tech University
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Daobin Yang
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences
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Tao Wang
Zhejiang Sci-Tech University
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Ziyi Ge
Ningbo Institute of Materials Technology and Engineering, CAS

Corresponding Author:geziyi@nimte.ac.cn

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Abstract

Inverted (p-i-n) perovskite solar cells (PSCs) are favored by researchers owing to their superior compatibility with flexible substrates and tandem device fabrication. Additionally, the hole transport layer (HTL) serves as a template for perovskite growth, which is critical for enhancing the device performance. However, the current research on how the HTL promotes perovskite crystallization is insufficient. Here, 4PADCB, a self-assembled monolayer (SAM) hole transport material, was optimized as a superior template for perovskite growth through comparative analysis; accordingly, compact perovskite film with vertical growth was prepared. The better matched energy level alignment between 4PADCB and perovskite suppressed nonradiative recombination at the interface and enabled rapid hole extraction. Moreover, high-quality perovskite film growth on 4PADCB exhibited lower Young’s modulus and less residual stress. By integrating 4PADCB into p-i-n PSCs, the optimal device achieved a power conversion efficiency of 24.80%, with an open-circuit voltage of 1.156 V, thus achieving the best rank among devices without perovskite post-treatment, additives, dopants, or intermediate layers. Furthermore, the unencapsulated device demonstrated exceptional thermostability and photostability under maximum power point tracking. Thus, this work provides a new understanding for the development of novel SAMs and perovskite growth, and it is expected to further improve device performance.
Submitted to Chinese Journal of Chemistry
12 Apr 2024Review(s) Completed, Editorial Evaluation Pending
24 Apr 2024Reviewer(s) Assigned
27 May 2024Editorial Decision: Revise Minor
30 May 20241st Revision Received
31 May 2024Submission Checks Completed
31 May 2024Assigned to Editor
31 May 2024Review(s) Completed, Editorial Evaluation Pending