The relationship between threshold voltage and dipolar character of self-assembled monolayers in organic thin-film transistors

M. Salinas, C. Jager, A. Amin, P. Dral, T. Meyer-Friedrichsen, A. Hirsch, Tim Clark, M. Halik

Research output: Contribution to journalArticlepeer-review

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–C60) 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.
Original languageEnglish
Pages (from-to)12648-12652
Number of pages5
JournalJournal of the American Chemical Society
Volume134
Issue number30
DOIs
Publication statusPublished - 2012

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