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Efficient Interlayer Exciton Transport in Two-Dimensional Metal-Halide Perovskites.
preprintsubmitted on 09.10.2020, 15:50 and posted on 12.10.2020, 12:37 by Alvaro J Magdaleno, Michael Seitz, Michel Frising, Ana Herranz de la Cruz, Antonio I. Fernández-Domínguez, Ferry Prins
We present transient microscopy measurements of interlayer energy transport in (PEA)2PbI4 perovskite. We find efficient interlayer exciton transport (0.06 cm2/s), which translates into a diffusion length that exceeds 100 nm and a sub-ps timescale for energy transfer. While still slower than in-plane exciton transport (0.2 cm2/s), our results show that excitonic energy transport is considerably less anisotropic than charge-carrier transport for 2D perovskites.
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in Materials Horizons