The discovery of intrinsic quantum confinement effects in the form of oscillations in the optical absorption of formamidinium lead triiodide thin films is a vivid example of the surprising physical properties of these hybrid organic–inorganic materials.
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Goñi, A.R. Echoes from quantum confinement. Nat. Mater. 19, 1138–1139 (2020). https://doi.org/10.1038/s41563-020-0796-3
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DOI: https://doi.org/10.1038/s41563-020-0796-3
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