Cyclic Multi-Site Chelation for Efficient and Stable Inverted Perovskite Solar Cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Jiandong He
  • Shuai Yang
  • Chao Luo
  • Xin Jiang
  • Zhe Liu
  • Yishun Feng
  • Ruihan Wu
  • Zhong-Rui Lan
  • Mingquan Tao
  • Guosheng Niu
  • Kaiyi Yang
  • Yu Yuan
  • Yili Wang
  • Xiao Deng
  • Yongjie Chen
  • Siyuan Zeng
  • Yao Zhao
  • Fuyi Wang
  • Yu-Wu Zhong
  • Weifeng Zhang
  • Qing Zhao
  • Feng Liu
  • Gui Yu
  • Jizheng Wang

Detail(s)

Original languageEnglish
Article numbere202414118
Journal / PublicationAngewandte Chemie - International Edition
Volume64
Issue number2
Online published21 Oct 2024
Publication statusPublished - 10 Jan 2025

Abstract

Trap-assisted non-radiative recombination losses and moisture-induced degradation significantly impede the development of highly efficient and stable inverted (p–i–n) perovskite solar cells (PSCs), which require high-quality perovskite bulk. In this research, we mitigate these challenges by integrating thermally stable perovskite layers with Lewis base covalent organic frameworks (COFs). The ordered pore structure and surface binding groups of COFs facilitate cyclic, multi-site chelation with undercoordinated lead ions, enhancing the perovskite quality across both its bulk and grain boundaries. This process not only reduces defects but also promotes improved energy alignment through n-type doping at the surface. The inclusion of COF dopants in p–i–n devices achieves power conversion efficiencies (PCEs) of 25.64 % (certified 24.94 %) for a 0.0748-cm2 device and 23.49 % for a 1-cm2 device. Remarkably, these devices retain 81 % of their initial PCE after 978 hours of accelerated aging at 85°C, demonstrating remarkable durability. Additionally, COF-doped devices demonstrate excellent stability under illumination and in moist conditions, even without encapsulation. © 2024 Wiley-VCH GmbH.

Research Area(s)

  • 2D covalent organic frameworks, chelation, DFT calculations, inverted perovskite solar cells, Lewis base

Citation Format(s)

Cyclic Multi-Site Chelation for Efficient and Stable Inverted Perovskite Solar Cells. / He, Jiandong; Yang, Shuai; Luo, Chao et al.
In: Angewandte Chemie - International Edition, Vol. 64, No. 2, e202414118, 10.01.2025.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review