Weak Hydrogen Bond with Iodide Modulating Crystallization of Methylammonium Lead Iodide for High-Performance Perovskite Solar Cells
The weak hydrogen bond with methylammonium iodide (MAI) dominates the formation of methylammonium lead iodide (MAPbI<sub>3</sub>) during its nucleation and growth process. Herein, a weak hydrogen bond involving iodide is designed between the MAI and glycerol molecule in mixed solvents containing N, N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) to delay the growth of MAPbI<sub>3</sub> film. Incorporation of glycerol into the perovskite film indicates a larger grain size and suppressed nonradiative recombination of carriers in the film. Finally, the glycerol-doped perovskite solar cells (PSCs) achieve a champion power conversion efficiency (PCE) of up to 16.84%, with excellent stability to retain 92.05% of their initial PCE after 30 days of storage. The above results unveil a deep understanding of weak hydrogen bonds in high-performance perovskite photovoltaics.
Authors
- P. Li
- L Chen
- Chenglong Wang (ORCID: https://orcid.org/0000-0002-6840-9529)
- Lu Li (ORCID: https://orcid.org/0000-0001-8976-0484)
- Zhen Liang (ORCID: https://orcid.org/0000-0003-3887-7804)
- Zhe Wan
- Yongrong Sun
- Liping Yang
- Zuyong Wang
- Ning Kang
Institutions
- Hunan University (CN)
- Lanzhou Jiaotong University (CN)
- Guangdong Academy of Sciences (CN)
Publication Details
- Journal
- Micromachines
- Published
- 2025-12-24
- DOI
- https://doi.org/10.3390/mi17010015
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Lanzhou Jiaotong University