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Updated: May 21, 2026

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
Published on: April 19, 2021
The relationship between threshold voltage and dipolar character of self-assembled monolayers in organic thin-film
Michael Salinas1, Christof M Jäger, Atefeh Y Amin
1Organic Materials & Devices, Institute of Polymer Materials, University Erlangen-Nürnberg, Erlangen, Germany.
Abstract:
We report a quantitative study that describes and correlates the threshold voltage of low-voltage organic field-effect transistors with the molecular structure of self-assembled monolayer dielectrics. We have observed that the component of the dipole moment of such self-assembled molecules perpendicular to the surface correlates linearly with the threshold voltage shift in devices. The model was validated using three different organic semiconductors (pentacene, α,α'-dihexylsexithiophene, and fullerene-C(60)) on six different self-assembled monolayers. The correlation found can help optimize future devices, by tuning the dipole moments of the molecules that constitute the self-assembled monolayer.
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