Journal
NATURE MATERIALS
Volume 17, Issue 11, Pages 1027-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41563-018-0189-z
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Funding
- ERC Grant on 2DMATE
- HIPER-G
- EU Graphene Flagship
- European Science Foundation (ESF)
- Coordination Networks: Building Blocks for Functional Systems (Spp 1928, COORNET)
- German Science Council
- Max Planck Society
- Max Planck Graduate Center [2017-T1/AMB-5207]
- Regional Government of Comunidad de Madrid [2017-T1/AMB-5207]
- Alexander von Humboldt-Foundation
- Helmholtz Association of German Research Centers through the International Helmholtz Research School for Nanoelectronic Networks, IHRS NANONET [VH-KO-606]
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Metal-organic frameworks (MOFs) are hybrid materials based on crystalline coordination polymers that consist of metal ions connected by organic ligands. In addition to the traditional applications in gas storage and separation or catalysis, the long-range crystalline order in MOFs, as well as the tunable coupling between the organic and inorganic constituents, has led to the recent development of electrically conductive MOFs as a new generation of electronic materials. However, to date, the nature of charge transport in the MOFs has remained elusive. Here we demonstrate, using high-frequency terahertz photoconductivity and Hall effect measurements, Drude-type band-like transport in a semiconducting, pi-d conjugated porous Fe-3(THT)(2)(NH4)(3 )(THT, 2,3,6,7,10,11-triphenylenehexathiol) two-dimensional MOF, with a room-temperature mobility up to similar to 220 cm(2) V-1 s(-1). The temperature-dependent conductivity reveals that this mobility represents a lower limit for the material, as mobility is limited by impurity scattering. These results illustrate the potential for high-mobility semiconducting MOFs as active materials in thin-film optoelectronic devices.
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