Cyclic Multi‐Site Chelation for Efficient and Stable Inverted Perovskite Solar Cells
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-cm<sup>2</sup> device and 23.49 % for a 1-cm<sup>2</sup> 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.
Authors
- Fuyi Wang (ORCID: https://orcid.org/0000-0003-0962-1260)
- Siyuan Zeng
- Yu‐Wu Zhong (ORCID: https://orcid.org/0000-0003-0712-0374)
- Chao Luo (ORCID: https://orcid.org/0000-0003-4305-6971)
- Fengzhu Li (ORCID: https://orcid.org/0000-0001-6022-4055)
- Mingquan Tao
- Qing Zhao (ORCID: https://orcid.org/0000-0003-3374-6901)
- Jizheng Wang (ORCID: https://orcid.org/0000-0003-0477-4145)
- Zhong‐Rui Lan
- Guosheng Niu (ORCID: https://orcid.org/0000-0002-6628-5892)
- Yao Zhao (ORCID: https://orcid.org/0000-0003-0613-8708)
- Zhe Liu (ORCID: https://orcid.org/0000-0002-7333-7929)
- Yong Zhang (ORCID: https://orcid.org/0000-0002-9587-4039)
- Yongjie Chen (ORCID: https://orcid.org/0000-0003-0853-9767)
- Shuai Yang (ORCID: https://orcid.org/0000-0001-9798-2239)
- Kaiyi Yang
- Yili Wang (ORCID: https://orcid.org/0000-0002-7649-3740)
- Xin Jiang (ORCID: https://orcid.org/0009-0006-5130-9165)
- Jiandong He (ORCID: https://orcid.org/0000-0002-1915-9420)
- Ruihan Wu (ORCID: https://orcid.org/0000-0002-5398-546X)
- Yuan Yu (ORCID: https://orcid.org/0000-0003-1009-5464)
- Feng Liu
- Yishun Feng
- Xiao Deng
Institutions
- City University of Hong Kong (HK)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- China Academy of Printing Technology (CN)
- Beijing National Laboratory for Molecular Sciences (CN)
- Institute of Chemistry (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2024-08-20
- DOI
- https://doi.org/10.1002/anie.202414118
- Citations
- 17
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.55
Funders
- Beijing National Laboratory for Molecular Sciences