Negative-resistance characteristics of organic-dye-doped thin-polymer-film device

In order to develop a new negative resistance device, a single-layer device of organic-dye-doped insulating polymer has been fabricated by dipping. The current-voltage characteristics at room temperature showed remarkable negative resistance, which did not depend greatly on the combination of insulating polymers and dopants. In addition, the ratio of peak current to valley current was 23 or higher and the difference 2 V. The origin of the negative resistance is discussed in terms of tunneling transport of holes or electrons through the bulk of the dye-doped polymer.