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Coordination assembly of 2D ordered organic metal chalcogenides with widely tunable electronic band gaps. | LitMetric

Coordination assembly of 2D ordered organic metal chalcogenides with widely tunable electronic band gaps.

Nat Commun

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS), 155 Yangqiao Road West, Fuzhou, Fujian, 350002, China.

Published: January 2020

AI Article Synopsis

  • This research explores a new method for creating 2D organic metal chalcogenides (OMCs) by modifying organic molecules before exfoliating them, which improves the properties of inorganic 2D materials.
  • Traditional techniques faced challenges with uneven compositions at a nanoscale and limited band gap ranges.
  • The study demonstrates that by adjusting the properties of organic functional groups and metal electronegativity, the band gaps and conductivities of OMCs can be significantly enhanced, achieving better results than previous chemical methods.

Article Abstract

Engineering the band gap chemically by organic molecules is a powerful tool with which to optimize the properties of inorganic 2D materials. The obtained materials are however still limited by inhomogeneous compositions and properties at nanoscale and small adjustable band gap ranges. To overcome these problems in the traditional exfoliation and then organic modification strategy, an organic modification and then exfoliation strategy was explored in this work for preparing 2D organic metal chalcogenides (OMCs). Unlike the reported organically modified 2D materials, the inorganic layers of OMCs are fully covered by long-range ordered organic functional groups. By changing the electron-donating ability of the organic functional groups and the electronegativity of the metals, the band gaps of OMCs were varied by 0.83 eV and their conductivities were modulated by 9 orders of magnitude, which are 2 and 10 times higher than the highest values observed in the reported chemical methods, respectively.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6959344PMC
http://dx.doi.org/10.1038/s41467-019-14136-8DOI Listing

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