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Electronic coupling between the unoccupied states of the organic and inorganic sublattices of methylammonium lead iodide: A hybrid organic-inorganic perovskite single crystal
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Condensed Matter Physics of Energy Materials. Uppsala Univ, Condensed Matter Phys Energy Mat, Div Xray Photon Sci, Dept Phys & Astron, Box 516, S-75121 Uppsala, Sweden..ORCID iD: 0000-0003-2932-7018
Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden..
Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden.;Raja Ramanna Ctr Adv Technol, Theory & Simulat Lab, HRDS, Indore 452013, India..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Condensed Matter Physics of Energy Materials. Uppsala Univ, Condensed Matter Phys Energy Mat, Div Xray Photon Sci, Dept Phys & Astron, Box 516, S-75121 Uppsala, Sweden.;Swerim AB, S-16407 Stockholm, Sweden..
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2021 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 104, no 4, article id L041302Article in journal (Refereed) Published
Abstract [en]

Organic-inorganic halide perovskites have been intensively reinvestigated due to their applications, yet the optoelectronic function of the organic cation remains unclear. Through organic-selective resonant Auger electron spectroscopy measurements on well-defined single-crystal surfaces, we find evidence for electronic coupling in the unoccupied states between the organic and inorganic sublattices of the prototypical hybrid perovskite, which is contrary to the notion based on previous studies that the organic cation is electronically inert. The coupling is relevant for electron dynamics in the material and for understanding optoelectronic functionality.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC American Physical Society, 2021. Vol. 104, no 4, article id L041302
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Condensed Matter Physics
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URN: urn:nbn:se:uu:diva-453921DOI: 10.1103/PhysRevB.104.L041302ISI: 000678811100009OAI: oai:DiVA.org:uu-453921DiVA, id: diva2:1596897
Funder
EU, Horizon 2020, 730872Swedish Research Council, 2018-06465Swedish Research Council, 2018-04330Swedish Research Council, 2014-6463Swedish Research Council, 2018-05336Swedish Research Council, 2018-05525Swedish Research Council, 2018-05973Swedish Energy Agency, P43549-1Swedish Energy Agency, 2017-006797Available from: 2021-09-23 Created: 2021-09-23 Last updated: 2024-01-15Bibliographically approved

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Man, GabrielSimonov, KonstantinSvanström, SebastianButorin, SergeiRensmo, Håkan
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