Cyclic Multi-Site Chelation for Efficient and Stable Inverted Perovskite Solar Cells
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Article number | e202414118 |
Journal / Publication | Angewandte Chemie - International Edition |
Volume | 64 |
Issue number | 2 |
Online published | 21 Oct 2024 |
Publication status | Published - 10 Jan 2025 |
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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.
In: Angewandte Chemie - International Edition, Vol. 64, No. 2, e202414118, 10.01.2025.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review