Scaling law for excitons in 2D perovskite quantum wells

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dc.citation.articleNumber2254en_US
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber9en_US
dc.contributor.authorBlancon, J.-C.en_US
dc.contributor.authorStier, A.V.en_US
dc.contributor.authorTsai, H.en_US
dc.contributor.authorNie, W.en_US
dc.contributor.authorStoumpos, C.C.en_US
dc.contributor.authorTraoré, B.en_US
dc.contributor.authorPedesseau, L.en_US
dc.contributor.authorKepenekian, M.en_US
dc.contributor.authorKatsutani, F.en_US
dc.contributor.authorNoe, G.T.en_US
dc.contributor.authorKono, J.en_US
dc.contributor.authorTretiak, S.en_US
dc.contributor.authorCrooker, S.A.en_US
dc.contributor.authorKatan, C.en_US
dc.contributor.authorKanatzidis, M.G.en_US
dc.contributor.authorCrochet, J.J.en_US
dc.contributor.authorEven, J.en_US
dc.contributor.authorMohite, A.D.en_US
dc.date.accessioned2018-09-26T14:52:44Zen_US
dc.date.available2018-09-26T14:52:44Zen_US
dc.date.issued2018en_US
dc.description.abstractRuddlesden-Popper halide perovskites are 2D solution-processed quantum wells with a general formula A2A'n-1M n X3n+1, where optoelectronic properties can be tuned by varying the perovskite layer thickness (n-value), and have recently emerged as efficient semiconductors with technologically relevant stability. However, fundamental questions concerning the nature of optical resonances (excitons or free carriers) and the exciton reduced mass, and their scaling with quantum well thickness, which are critical for designing efficient optoelectronic devices, remain unresolved. Here, using optical spectroscopy and 60-Tesla magneto-absorption supported by modeling, we unambiguously demonstrate that the optical resonances arise from tightly bound excitons with both exciton reduced masses and binding energies decreasing, respectively, from 0.221 m0 to 0.186 m0 and from 470 meV to 125 meV with increasing thickness from n equals 1 to 5. Based on this study we propose a general scaling law to determine the binding energy of excitons in perovskite quantum wells of any layer thickness.en_US
dc.identifier.citationBlancon, J.-C., Stier, A.V., Tsai, H., et al.. "Scaling law for excitons in 2D perovskite quantum wells." <i>Nature Communications,</i> 9, (2018) Springer Nature: https://doi.org/10.1038/s41467-018-04659-x.en_US
dc.identifier.digitals41467-018-04659-xen_US
dc.identifier.doihttps://doi.org/10.1038/s41467-018-04659-xen_US
dc.identifier.urihttps://hdl.handle.net/1911/102717en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.titleScaling law for excitons in 2D perovskite quantum wellsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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