High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework

Renhao Dong, Peng Han, Himani Arora, Marco Ballabio, Melike Karakus, Zhe Zhang, Chandra Shekhar, Peter Adler, Petko St Petkov, Artur Erbe, Stefan C.B. Mannsfeld, Claudia Felser, Thomas Heine, Mischa Bonn, Xinliang Feng, Enrique Cánovas

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73 Citations (Scopus)

Abstract

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, π–d conjugated porous Fe 3 (THT) 2 (NH 4 ) 3 (THT, 2,3,6,7,10,11-triphenylenehexathiol) two-dimensional MOF, with a room-temperature mobility up 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.

Original languageEnglish
Pages (from-to)1027-1032
Number of pages6
JournalNature materials
Volume17
Issue number11
DOIs
Publication statusPublished - 2018 Nov 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Dong, R., Han, P., Arora, H., Ballabio, M., Karakus, M., Zhang, Z., Shekhar, C., Adler, P., Petkov, P. S., Erbe, A., Mannsfeld, S. C. B., Felser, C., Heine, T., Bonn, M., Feng, X., & Cánovas, E. (2018). High-mobility band-like charge transport in a semiconducting two-dimensional metal–organic framework. Nature materials, 17(11), 1027-1032. https://doi.org/10.1038/s41563-018-0189-z