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dc.contributor.authorPark, Soohyung
dc.contributor.authorSchultz, Thorsten
dc.contributor.authorXu, Xiaomin
dc.contributor.authorWegner, Berthold
dc.contributor.authorAljarb, Areej
dc.contributor.authorHan, Ali
dc.contributor.authorLi, Lain-Jong
dc.contributor.authorTung, Vincent
dc.contributor.authorAmsalem, Patrick
dc.contributor.authorKoch, Norbert
dc.date.accessioned2019-10-22T13:49:42Z
dc.date.available2019-10-22T13:49:42Z
dc.date.issued2019-09-13
dc.identifier.citationPark, S., Schultz, T., Xu, X., Wegner, B., Aljarb, A., Han, A., … Koch, N. (2019). Demonstration of the key substrate-dependent charge transfer mechanisms between monolayer MoS2 and molecular dopants. Communications Physics, 2(1). doi:10.1038/s42005-019-0212-y
dc.identifier.doi10.1038/s42005-019-0212-y
dc.identifier.urihttp://hdl.handle.net/10754/659077
dc.description.abstractTuning the Fermi level (EF) in two-dimensional transition metal dichalcogenide (TMDC) semiconductors is crucial for optimizing their application in (opto-)electronic devices. Doping by molecular electron acceptors and donors has been suggested as a promising method to achieve EF-adjustment. Here, we demonstrate that the charge transfer (CT) mechanism between TMDC and molecular dopant depends critically on the electrical nature of the substrate as well as its electronic coupling with the TMDC. Using angle-resolved ultraviolet and X-ray photoelectron spectroscopy, we reveal three fundamentally different, substrate-dependent CT mechanisms between the molecular electron acceptor 1,3,4,5,7,8-hexafluoro-tetracyano-naphthoquinodimethane (F6TCNNQ) and a MoS2 monolayer. Our results demonstrate that any substrate that acts as charge reservoir for dopant molecules can prohibit factual doping of a TMDC monolayer. On the other hand, the three different CT mechanisms can be exploited for the design of advanced heterostructures, exhibiting tailored electronic properties in (opto-)electronic devices based on two-dimensional semiconductors.
dc.description.sponsorshipThis work was funded by the Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 182087777 - SFB 951. S.P. acknowledges support by the Alexander von Humboldt-Stiftung. V.T. acknowledges the support from KAUST Solar Center Seed fund and under User Proposals (#4420 and #5067) at the Molecular Foundry, Lawrence Berkeley National Lab, supported by the Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This work was supported by the KIST Institutional Program (Project No. 2E29850) and the National Research Foundation (NRF) of Korea under Grant 2018M3D1A1058793, funded by the Korean Government. Part of Fig. 4 was created with the software VESTA (Momma, K. and Izumi, F. VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data. J. Appl. Crystallogr. 44, 1272–1276 (2011)).
dc.publisherSpringer Science and Business Media LLC
dc.relation.urlhttp://www.nature.com/articles/s42005-019-0212-y
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/.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleDemonstration of the key substrate-dependent charge transfer mechanisms between monolayer MoS2 and molecular dopants
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCommunications Physics
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionHumboldt-Universität zu Berlin, Institut für Physik & IRIS Adlershof, Brook-Taylor Straße 6, 12489, Berlin, Germany
dc.contributor.institutionHelmholtz-Zentrum für Materialien und Energie GmbH, Bereich Solarenergieforschung, Albert-Einstein-Straße 15, 12489, Berlin, Germany
dc.contributor.institutionAdvanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea
dc.contributor.institutionSchool of Materials Science and Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
dc.contributor.institutionMolecular Foundry, Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA
kaust.personAljarb, Areej
kaust.personHan, Ali
kaust.personLi, Lain-Jong
kaust.personTung, Vincent
refterms.dateFOA2019-10-22T13:56:18Z
kaust.acknowledged.supportUnitKAUST Solar Center
dc.date.published-online2019-09-13
dc.date.published-print2019-12


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This 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/.
Except where otherwise noted, this item's license is described as This 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/.