Bifunctional Organic Spacers for Formamidinium-Based Hybrid Dion-Jacobson Two-Dimensional Perovskite Solar Cells
Three-dimensional (3D) perovskite materials display remarkable potential in photovoltaics owing to their superior solar-to-electric power conversion efficiency, with current efforts focused on improving stability. Two-dimensional (2D) perovskite analogues feature greater stability toward environmental factors, such as moisture, owing to a hydrophobic organic cation that acts as a spacer between the inorganic layers, which offers a significant advantage over their comparatively less stable 3D analogues. Here, we demonstrate the first example of a formamidinium (FA) containing Dion Jacobson 2D perovskite material characterized by the BFA(n-1)Pb(n)I(3n+1) formulation through employing a novel bifunctional organic spacer (B), namely 1,4-phenyl-enedimethanammonium (PDMA). We achieve remarkable efficiencies exceeding 7% for (PDMA)-FA(2)Pb(3)I(10) based 2D perovskite solar cells resisting degradation when exposed to humid ambient air, which opens up new avenues in the design of stable perovskite materials.
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Li, Y., Milic, J. V., Ummadisingu, A., Seo, J.-Y., Im, J.-H., Kim, H.-S., Liu, Y., Dar, M. I., Zakeeruddin, S. M., Wang, P., Hagfeldt, A., & Gratzel, M. (2019). Bifunctional Organic Spacers for Formamidinium-Based Hybrid Dion-Jacobson Two-Dimensional Perovskite Solar Cells. Nano Letters, 19(1), 150–157. https://doi.org/10.1021/acs.nanolett.8b03552
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WOS:000455561300018
2019-01-01
19
1
150
157
REVIEWED
EPFL