Scalable photonic sources using two-dimensional lead halide perovskite superlattices

Jakub Jagielski, Simon F. Solari, Lucie Jordan, Declan Scullion, Balthasar Blülle, Yen-Ting Li, Frank Krumeich, Yu-Cheng Chiu, Beat Ruhstaller, Elton J. G. Santos and Chih-Jen Shih ()
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Jakub Jagielski: ETH Zürich
Simon F. Solari: ETH Zürich
Lucie Jordan: ETH Zürich
Declan Scullion: Queen’s University Belfast
Balthasar Blülle: Fluxim AG
Yen-Ting Li: National Taiwan University of Science and Technology
Frank Krumeich: ETH Zürich
Yu-Cheng Chiu: National Taiwan University of Science and Technology
Beat Ruhstaller: Fluxim AG
Elton J. G. Santos: Queen’s University Belfast
Chih-Jen Shih: ETH Zürich

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Miniaturized photonic sources based on semiconducting two-dimensional (2D) materials offer new technological opportunities beyond the modern III-V platforms. For example, the quantum-confined 2D electronic structure aligns the exciton transition dipole moment parallel to the surface plane, thereby outcoupling more light to air which gives rise to high-efficiency quantum optics and electroluminescent devices. It requires scalable materials and processes to create the decoupled multi-quantum-well superlattices, in which individual 2D material layers are isolated by atomically thin quantum barriers. Here, we report decoupled multi-quantum-well superlattices comprised of the colloidal quantum wells of lead halide perovskites, with unprecedentedly ultrathin quantum barriers that screen interlayer interactions within the range of 6.5 Å. Crystallographic and 2D k-space spectroscopic analysis reveals that the transition dipole moment orientation of bright excitons in the superlattices is predominantly in-plane and independent of stacking layer and quantum barrier thickness, confirming interlayer decoupling.

Date: 2020
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DOI: 10.1038/s41467-019-14084-3

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