1. On‐surface Synthesis of a Semiconducting 2D Metal–Organic Framework Cu 3 (C 6 O 6 ) Exhibiting Dispersive Electronic Bands
- Author
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Anthoula C. Papageorgiou, Hu Xu, Muqing Hua, Ran Zhang, Johannes V. Barth, Bowen Xia, Yifan Gao, Joachim Reichert, Nian Lin, Li Huang, Jing Liu, and Peter Knecht
- Subjects
Electron mobility ,Materials science ,010405 organic chemistry ,business.industry ,General Chemistry ,010402 general chemistry ,01 natural sciences ,Catalysis ,0104 chemical sciences ,law.invention ,Crystallography ,Semiconductor ,Effective mass (solid-state physics) ,X-ray photoelectron spectroscopy ,law ,Direct and indirect band gaps ,Scanning tunneling microscope ,Spectroscopy ,business ,Electronic band structure - Abstract
A 2D metal-organic framework (2D-MOF) was formed on a Cu(111) substrate using benzenehexol molecules. By means of a combination of scanning tunneling microscopy and spectroscopy, X-ray photoelectron spectroscopy and density-functional theory, the structure of the 2D-MOF is determined to be Cu3 (C6 O6 ), which is stabilized by O-Cu-O bonding motifs. We find that upon adsorption on Cu(111), the 2D-MOF features a semiconductor band structure with a direct band gap of 1.5 eV. The O-Cu-O bonds offer efficient charge delocalization, which gives rise to a highly dispersive conduction band with an effective mass of 0.45 me at the band bottom, implying a high electron mobility in this material.
- Published
- 2020
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