Effects of the permanent dipoles of self-assembled monolayer-treated insulator surfaces on the field-effect mobility of a pentacene thin-film transistor
Open Access
- 26 March 2007
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (13) , 132104
- https://doi.org/10.1063/1.2457776
Abstract
In order to investigate the effects of permanent dipoles on insulator surfaces on the electrical properties of organic thin-film transistors, the authors fabricated insulators with various self-assembled monolayers and similar surface energies. Surprisingly, they found that the field-effect mobility of pentacene thin-film transistors increases by a factor of approximately 20 for insulators with an electron-withdrawing group. This remarkable increase in the field-effect mobility is due to the increase in the hole density of the insulator surface that arises from the increased band bending of the insulator/semiconductor interface.Keywords
This publication has 11 references indexed in Scilit:
- Low-voltage and high-field-effect mobility organic transistors with a polymer insulatorApplied Physics Letters, 2006
- Enhancement of Field‐Effect Mobility Due to Surface‐Mediated Molecular Ordering in Regioregular Polythiophene Thin Film TransistorsAdvanced Functional Materials, 2005
- Using Self‐Assembling Dipole Molecules to Improve Hole Injection in Conjugated PolymersAdvanced Functional Materials, 2004
- Threshold voltage shift in organic field effect transistors by dipole monolayers on the gate insulatorJournal of Applied Physics, 2004
- Phase State Effect on Adhesion Behavior of Self-Assembled MonolayersLangmuir, 2004
- Control of carrier density by self-assembled monolayers in organic field-effect transistorsNature Materials, 2004
- Surface Potential Control of an Insulator Layer for the High Performance Organic FETSynthetic Metals, 2003
- High-mobility polymer gate dielectric pentacene thin film transistorsJournal of Applied Physics, 2002
- Controlling the Work Function of Indium Tin Oxide: Differentiating Dipolar from Local Surface EffectsJournal of the American Chemical Society, 2002
- Controlling Schottky energy barriers in organic electronic devices using self-assembled monolayersPhysical Review B, 1996