Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 40, Pages 16892-16897Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta03660c
Keywords
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Funding
- Tianjin Municipal Science and Technology Commission [12JCZDJC28100]
- NSFC [21273118]
- MOE in China [IRT13022]
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Density functional theory computations were performed to investigate the adsorption of four organic molecules, including tetracyanoquinodimethane (TCNQ), tetracyanoethylene (TCNE), tetrathiafulvalene (TTF) and benzyl viologen (BV) on the basal plane of MoS2 monolayer (MoS2ML). There mainly exist non-covalent weak interactions between these organic molecules and MoS2ML with considerable charge transfer. Due to the adsorption of organic molecules, the band gap of MoS2ML can be efficiently reduced as the flat molecular levels lie in the band gap region of MoS2ML. Moreover, the adsorption of TCNQ can significantly enhance the optical absorption of MoS2ML in the infrared region of solar spectrum, whereas the adsorption of other molecules has negligible effect on the optical properties of MoS2ML. Our computations provide a flexible approach towards tuning the electronic and optical properties of MoS2ML.
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