Abstract
The aim of this work is to improve charge injection by interposing an appropriately oriented dipole layer between contact and semiconductor in organic thin-film transistors (OTFTs). OTFTs are fabricated with pentacene semiconductor and gold source and drain contacts. The contacts are modified with self-assembled monolayers (SAMs) made of alkane or fluorinated alkane thiols. Ultraviolet photoelectron spectroscopy (UPS) shows a respective decrease and increase of the work function of the electrodes. Consistent with these results, we observe an increase and a decrease, respectively, of the contact resistance of the OTFTs, and a further decrease when shortening the length of the fluorinated molecule.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 419-424 |
| Number of pages | 6 |
| Journal | Organic Electronics |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| State | Published - Aug 2008 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering
Keywords
- Atomic force microscopy
- Contact resistance
- Organic thin-film transistor
- Self-assembled monolayers
- Ultraviolet photoelectron spectroscopy
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Cite this
Marmont, P., Battaglini, N., Lang, P., Horowitz, G., Hwang, J., Kahn, A., Amato, C., & Calas, P. (2008). Improving charge injection in organic thin-film transistors with thiol-based self-assembled monolayers. Organic Electronics, 9(4), 419-424. https://doi.org/10.1016/j.orgel.2008.01.004