Highly Stable Sn─Pb Perovskite Solar Cells Enabled by Phenol-Functionalized Hole Transporting Material
Wu J, Hu M, Dai Q, Alkan EA, Barabash A, Zhang J, Liu C, Hauch JA, Han GF, Jiang Q, Wang T, Seok SI, Brabec CJ (2025)
Publication Type: Journal article
Publication year: 2025
Journal
Abstract
Sn─Pb perovskites, a most promising low bandgap semiconductor for multi-junction solar cells, are often limited by instability due to the susceptibility of Sn2+ to oxidation. Inspired by the antioxidative properties of polyphenolic compounds, we introduce the reductive phenol group and strong electronegative fluorine into an organic conjugated structure and design a multi-functional polymer with fluorine and phenol units (PF─OH). The design of PF─OH allows the effective rise in the energy barrier of Sn2+ oxidation, leading to a significant enhancement in the stability of Sn─Pb perovskite devices from 200 to 8000 h—an improvement of around 100 times. Additionally, the strong binding energy between Sn2+ and the phenol in PF─OH critically influences Sn─Pb perovskite's crystallization and grain growth, resulting in perovskite films with fewer pinholes at the buried interface and extended carrier lifetimes. This enhancement not only boosts the power conversion efficiency (PCE) to 23.61%, but also significantly improves the operational stability of the devices. Ultimately, this design strategy has been proven universal through the phenolization of a series of molecules, marking a milestone in enhancing the stability of Sn─Pb perovskites.
Authors with CRIS profile
Involved external institutions
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원
Korea, Republic of (KR)
Jilin University (JLU) / 吉林大学
China (CN)
Germany (DE)
Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원
Korea, Republic of (KR)
Jilin University (JLU) / 吉林大学
China (CN)
How to cite
APA:
Wu, J., Hu, M., Dai, Q., Alkan, E.A., Barabash, A., Zhang, J.,... Brabec, C.J. (2025). Highly Stable Sn─Pb Perovskite Solar Cells Enabled by Phenol-Functionalized Hole Transporting Material. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.202424515
MLA:
Wu, Jianchang, et al. "Highly Stable Sn─Pb Perovskite Solar Cells Enabled by Phenol-Functionalized Hole Transporting Material." Angewandte Chemie International Edition (2025).
BibTeX: Download