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The Role of Oxygen in the Degradation of Methylammonium Lead Trihalide Perovskite Photoactive Layers
Abstract
In this paper we report on the influence of light and oxygen on the stability of CH 3 NH 3 PbI 3 perovskite‐based photoactive layers. When exposed to both light and dry air the mp‐Al 2 O 3/CH 3 NH 3 PbI 3 photoactive layers rapidly decompose yielding methylamine, PbI 2, and I 2 as products. We show that this degradation is initiated by the reaction of superoxide (O 2−) with the methylammonium moiety of the perovskite absorber. Fluorescent molecular probe studies indicate that the O 2− species is generated by the reaction of photoexcited electrons in the perovskite and molecular oxygen. We show that the yield of O 2− generation is significantly reduced when the mp‐Al 2 O 3 film is replaced with an mp‐TiO 2 electron extraction and transport layer. The present findings suggest that replacing the methylammonium component in CH 3 NH 3 PbI 3 to a species without acid protons could improve tolerance to oxygen and enhance stability.
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Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells
Jeon, N. J., Noh, J. H., Kim, Y. C., Yang, W. S., Ryu, S., & Seok, S. I. (2014) · Nature Materials · doi:10.1038/nmat4014 · Cited by 6,723
Cited by
Dunfield, S. P., Bliss, L., Zhang, F., Luther, J. M., Zhu, K., van Hest, M. F. A. M., Reese, M. O., & Berry, J. J. (2020) · Advanced Energy Materials · doi:10.1002/aenm.201904054 · Cited by 435
Rationalization of passivation strategies toward high-performance perovskite solar cells
Zhang, Z., Qiao, L., Meng, K., Long, R., Chen, G., & Gao, P. (2023) · Chemical Society Reviews · doi:10.1039/d2cs00217e · Cited by 357
Metadata
- Authors
- Aristidou, N., Sanchez‐Molina, I., Chotchuangchutchaval, T., Brown, M., Martinez, L., Rath, T., & Haque, S. A.
- Venue
- Angewandte Chemie
- Publisher
- Wiley
- Published
- 2015-05-26
- Volume
- 127
- Issue
- 28
- Pages
- 8326-8330
- ISSN
- 0044-8249 (ISSN-L)
- 1521-3757
- OpenAlex
- W4256326152
- Cited by
- 247
- References
- 1
- FWCI
- 5.61
- Type
- journal article
- Language
- en
- Open access
- closed
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- Aristidou, N., Sanchez‐Molina, I., Chotchuangchutchaval, T., Brown, M., Martinez, L., Rath, T., & Haque, S. A. (2015). The Role of Oxygen in the Degradation of Methylammonium Lead Trihalide Perovskite Photoactive Layers. Angewandte Chemie. https://doi.org/10.1002/ange.201503153
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