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

Yanzhou Li, Xiaoming Jiang, Zhihua Fu, Qingqing Huang, Guan-E. Wang, Wei-Hua Deng, Chen Wang, Zhenzhu Li, Wanjian Yin, Banglin Chen and Gang Xu ()
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Yanzhou Li: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Xiaoming Jiang: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Zhihua Fu: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Qingqing Huang: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Guan-E. Wang: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Wei-Hua Deng: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)
Chen Wang: Soochow University
Zhenzhu Li: Soochow University
Wanjian Yin: Soochow University
Banglin Chen: University of Texas at San Antonio
Gang Xu: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS)

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: 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 107 times higher than the highest values observed in the reported chemical methods, respectively.

Date: 2020
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DOI: 10.1038/s41467-019-14136-8

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