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Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells through SnF2–Pyrazine Complex
Abstract
To fabricate efficient formamidinium tin iodide (FASnI3) perovskite solar cells (PSCs), it is essential to deposit uniform and dense perovskite layers and reduce Sn(4+) content. Here we used solvent-engineering and nonsolvent dripping process with SnF2 as an inhibitor of Sn(4+). However, excess SnF2 induces phase separation on the surface of the perovskite film. In this work, we report the homogeneous dispersion of SnF2 via the formation of the SnF2-pyrazine complex. Consequently, we fabricated FASnI3 PSCs with high reproducibility, achieving a high power conversion efficiency of 4.8%. Furthermore, the encapsulated device showed a stable performance for over 100 days, maintaining 98% of its initial efficiency.
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Cited by
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Perovskites for Next-Generation Optical Sources
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Metadata
- Authors
- Lee, S. J., Shin, S. S., Kim, Y. C., Kim, D., Ahn, T. K., Noh, J. H., Seo, J., & Seok, S. I.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-03-17
- Volume
- 138
- Issue
- 12
- Pages
- 3974-3977
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2296106661
- Cited by
- 817
- References
- 18
- FWCI
- 41.16
- Type
- journal article
- Language
- en
- Open access
- closed
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