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2D perovskite stabilized phase-pure formamidinium perovskite solar cells
Open accessAbstract
Compositional engineering has been used to overcome difficulties in fabricating high-quality phase-pure formamidinium perovskite films together with its ambient instability. However, this comes alongside an undesirable increase in bandgap that sacrifices the device photocurrent. Here we report the fabrication of phase-pure formamidinium-lead tri-iodide perovskite films with excellent optoelectronic quality and stability. Incorporation of 1.67 mol% of 2D phenylethylammonium lead iodide into the precursor solution enables the formation of phase-pure formamidinium perovskite with an order of magnitude enhanced photoluminescence lifetime. The 2D perovskite spontaneously forms at grain boundaries to protect the formamidinium perovskite from moisture and suppress ion migration. A stabilized power conversion efficiency (PCE) of 20.64% (certified stabilized PCE of 19.77%) is achieved with a short-circuit current density exceeding 24 mA cm−2 and an open-circuit voltage of 1.130 V, corresponding to a loss-in-potential of 0.35 V, and significantly enhanced operational stability.
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Cites
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Cited by
A Review of Perovskites Solar Cell Stability
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Caffeine Improves the Performance and Thermal Stability of Perovskite Solar Cells
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Self-citationInterfacial Residual Stress Relaxation in Perovskite Solar Cells with Improved Stability
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Metadata
- Authors
- Lee, J.-W., Dai, Z., Han, T.-H., Choi, C., Chang, S.-Y., Lee, S.-J., De Marco, N., Zhao, H., Sun, P., Huang, Y., & Yang, Y.
- Venue
- Nature Communications
- Published
- 2018-08-01
- Volume
- 9
- Issue
- 1
- Pages
- 3021-3021
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2883518282
- Cited by
- 746
- References
- 40
- FWCI
- 33.78
- Type
- journal article
- Language
- en
- Open access
- gold
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- Lee, J.-W., Dai, Z., Han, T.-H., Choi, C., Chang, S.-Y., Lee, S.-J., De Marco, N., Zhao, H., Sun, P., Huang, Y., & Yang, Y. (2018). 2D perovskite stabilized phase-pure formamidinium perovskite solar cells. Nature Communications. https://doi.org/10.1038/s41467-018-05454-4
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