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Pb clustering and PbI2 nanofragmentation during methylammonium lead iodide perovskite degradation
Open accessAbstract
Studying defect formation and evolution in MethylAmmonium lead Iodide (MAPbI 3) perovskite layers has a bottleneck in the softness of the matter and in its consequent sensitivity to external solicitations. Here we report that, in a polycrystalline MAPbI 3 layer, Pb-related defects aggregate into nanoclusters preferentially at the triple grain boundaries as unveiled by Transmission Electron Microscopy (TEM) analyses at low total electron dose. Pb-clusters are killer against MAPbI 3 integrity since they progressively feed up the hosting matrix. This progression is limited by the concomitant but slower transformation of the MAPbI 3 core to fragmented and interconnected nano-grains of 6H-PbI 2 that are structurally linked to the mother grain as in strain-relaxed heteroepitaxial coupling. The phenomenon occurs more frequently under TEM degradation whilst air degradation is more prone to leave uncorrelated [001]-oriented 2H-PbI 2 grains as statistically found by X-Ray Diffraction. This path is kinetically costlier but thermodynamically favoured and is easily activated by catalytic species.
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Cites
Challenges for commercializing perovskite solar cells
Rong, Y., Hu, Y., Mei, A., Tan, H., Saidaminov, M. I., Seok, S. I., McGehee, M. D., Sargent, E. H., & Han, H. (2018) · Science · doi:10.1126/science.aat8235 · Cited by 2,140
Cited by
Temperature-Dependent Optical Band Gap in CsPbBr3, MAPbBr3, and FAPbBr3 Single Crystals
Mannino, G., Deretzis, I., Smecca, E., La Magna, A., Alberti, A., Ceratti, D., & Cahen, D. (2020) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.0c00295 · Cited by 355
Self-citationZhou, Y., Herz, L. M., Jen, A. K.-Y., & Saliba, M. (2022) · Nature Energy · doi:10.1038/s41560-022-01096-5 · Cited by 281
Ferrer Orri, J., Doherty, T. A. S., Johnstone, D., Collins, S. M., Simons, H., Midgley, P. A., Ducati, C., & Stranks, S. D. (2022) · Advanced Materials · doi:10.1002/adma.202200383 · Cited by 34
Metadata
- Authors
- Alberti, A., Bongiorno, C., Smecca, E., Deretzis, I., La Magna, A., & Spinella, C.
- Venue
- Nature Communications
- Published
- 2019-05-16
- Volume
- 10
- Issue
- 1
- Pages
- 2196-2196
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2946688422
- Cited by
- 172
- References
- 1
- FWCI
- 6.87
- Type
- journal article
- Language
- en
- Open access
- gold
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- Alberti, A., Bongiorno, C., Smecca, E., Deretzis, I., La Magna, A., & Spinella, C. (2019). Pb clustering and PbI2 nanofragmentation during methylammonium lead iodide perovskite degradation. Nature Communications. https://doi.org/10.1038/s41467-019-09909-0
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