Current-Voltage Characteristics of Bi-dithiolbenzene in Parallel Arrangement
2011
The low voltage conductance of interacting two 1,4‐dithiolbenzene (DTB) molecules is investigated. The simulation results show that the electron transport can be controlled either by changing the Fermi level position Eƒ or modifying its inter‐molecular spacing d. Molecular assembly system with close interaction between DTB units, affects significantly the conductance. In addition, the position of the Fermi plays an important role in determining the current flow. Moreover, it is important to note that Eƒ affects not only the threshold voltage Vth, but also the saturation voltage Vsat. When Eƒ approaches the LUMO energy level, Vth decreases, while Vsat increases. To conclude, the threshold voltage and the saturation voltage depend on the Fermi level position and the inter‐molecular spacing.
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