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Transport Mechanism of Self-Assembled D-σ-A-Thiol Monolayers in Metal-Molecule-Metal Structure
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- Authors
- Do Hyun Kim, Hyo Young Lee, Tae Hyoung Zyoung
- Issue Date
- 2005-09
- Citation
- Synthetic Metals, v.152, no.1-3, pp.293-296
- ISSN
- 0379-6779
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Transport mechanism of rectifying D-??-A-SAc molecule in the structure of vertical metal-molecule-metal (MMM) has been investigated by using variable temperature measurement. We successfully synthesized a novel D-??-A-SAc molecule and fabricated the molecular rectifying array device by using self-assembly technique. The results of variable temperature measurements suggest that electron injection in the interface between electron donor molecule and Ti/Au electrode is dominated by a thermal emission with a barrier height of around 0.29 eV while carrier injection between thiolated A-??-D molecule and gold electrode is dominated by tunneling with a barrier height of around 0.8 eV. Therefore, we suggest that the origin of rectification comes from energy differences of two interfacial barriers in MMM device. © 2005 Elsevier B.V. All rights reserved.
- KSP Keywords
- Au electrode, Carrier injection, Gold electrodes, Interfacial barrier, Self-assembly technique, Thermal Emission, Thiol monolayer, Transport mechanism, Variable temperature, barrier height, donor molecule