Layer-edge device of two-dimensional hybrid perovskites

Bin Cheng, Ting-You Li, Pai-Chun Wei, Jun Yin, Kang-Ting Ho, José Ramón Durán Retamal, Omar F. Mohammed and Jr-Hau He ()
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Bin Cheng: King Abdullah University of Science and Technology
Ting-You Li: King Abdullah University of Science and Technology
Pai-Chun Wei: King Abdullah University of Science and Technology
Jun Yin: King Abdullah University of Science and Technology
Kang-Ting Ho: King Abdullah University of Science and Technology
José Ramón Durán Retamal: King Abdullah University of Science and Technology
Omar F. Mohammed: King Abdullah University of Science and Technology
Jr-Hau He: King Abdullah University of Science and Technology

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Two dimensional layered organic-inorganic hybrid perovskites (2D perovskites) are potential candidates for next generation photovoltaic device. Especially, the out-of-plane surface perpendicular to the superlattice plane of 2D perovskites (layer-edge surface) has presented several exotic behaviors, such as layer-edge states which are found to be crucial for improving the efficiency of 2D perovskite solar cells. However, fundamental research on transport properties of layer-edge surface is still absent. In this report, we observe the electronic and opto-electronic behavior in layer-edge device of 2D perovskites. The dark and photo currents are demonstrated to strongly depend on the crystallographic orientation in layer-edge device, and such anisotropic properties, together with photo response, are related to the thickness of inorganic layers. Finally, due to the abundant hydroxyl groups, water molecules are easy to condense on the layer-edge surface, and the conductance is extremely sensitive to the humidity environment, indicating a potential application of humidity sensor.

Date: 2018
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DOI: 10.1038/s41467-018-07656-2

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