The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Stabilization of the Trigonal High-Temperature Phase of Formamidinium Lead Iodide
Open accessAbstract
Formamidinium lead iodide (FAPbI3) has the potential to achieve higher performance than established perovskite solar cells like methylammonium lead iodide (MAPbI3), while maintaining a higher stability. The major drawback for the latter material is that it can crystallize at room temperature in a wide bandgap hexagonal symmetry (P63mc) instead of the desired trigonal (P3m1) black phase formed at a higher temperature (130 °C). Our results show that employing a mixture of MAI and FAI in films deposited via a two-step approach, where the MAI content is <20%, results in the exchange of FA molecules with MA without any significant lattice shrinkage. Additionally, we show with temperature-dependent X-ray diffraction that the trigonal phase exhibits no phase changes in the temperature range studied (25 to 250 °C). We attribute the stabilization of the structure to stronger interactions between the MA cation and the inorganic cage. Finally, we show that the inclusion of this small amount of MA also has a positive effect on the lifetime of the photoexcited species and results in more efficient devices.
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Cites
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Wang, R., Mujahid, M., Duan, Y., Wang, Z., Xue, J., & Yang, Y. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201808843 · Cited by 1,310
Progress on Perovskite Materials and Solar Cells with Mixed Cations and Halide Anions
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Cubic Perovskite Structure of Black Formamidinium Lead Iodide, α-[HC(NH2)2]PbI3, at 298 K
Weller, M. T., Weber, O. J., Frost, J. M., & Walsh, A. (2015) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.5b01432 · Cited by 580
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Metadata
- Authors
- Binek, A., Hanusch, F. C., Docampo, P., & Bein, T.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-03-23
- Volume
- 6
- Issue
- 7
- Pages
- 1249-1253
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2314225761
- Cited by
- 572
- References
- 25
- FWCI
- 28.55
- Type
- journal article
- Language
- en
- Open access
- green
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