| 概 要 |
Organic materials as synthetic metals and field-effect transistors (OFETs) have attracted a great deal of interest in the last years due to their unique processing characteristics and performance levels achieved. However, in order to have devices suitable for low-cost integrated circuit technology, it is not only necessary to have materials with high carrier mobility but they also need to be solution-processed.
Using TTF derivatives as building blocks we have prepared by solution-based methods metallic and semiconducting layers over polymers that behave not only as molecular conductors but also as very good pressure sensors. In addition “all organic” circuits can be drawn by thermal treatment of these composite materials.
Results in the preparations of single-crystal OFETs based on tetrathiafulvalene (TTF) derivatives prepared from solutions will also be presented. These crystals exhibit one of the highest mobility found for solution-processed materials, 3.6 cm2/Vs as well as a very good ON/OFF ratio (ON/OFF > 7・105) and are also among the highest reported for OFETs. By changing the characteristics of the organic building blocks we are able to tune the OFETs mobility and a correlation between the crystal packing and the mobility can be established.
The results on the electrical properties of self-assembled monolayers of similar compounds on Au(111) will also be presented as well as conducting fibers, gels and 2D organizations.
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