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Perovskite photovoltaics

A sharp interface

Capping a three-dimensional metal halide perovskite with a layered, two-dimensional perovskite prevents ions from diffusing out of the perovskite keeping out oxygen and water as well as contributing to solar cell stability. New research shows that a thin cross-linked polymer layer can ensure that the boundary between the 3D and 2D materials remains sharp, further improving stability.

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Fig. 1: Preparation of the CPL and stabilisation of the 3D/2D perovskite interface.

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Correspondence to Michael D. McGehee.

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The author is an advisor to Swift Solar.

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McGehee, M.D. A sharp interface. Nat Energy 8, 224–225 (2023). https://doi.org/10.1038/s41560-023-01214-x

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