Negative differential resistance polymer devices and circuits incorporating same

A device comprising:

• a first electrical contact, a second electrical contact, a semiconducting or semimetallic organic layer disposed at least partially between the first and second electrical contacts, and a tunneling barrier layer disposed at least partially between the semiconducting or semimetallic organic layer and the first electrical contact, the tunneling barrier layer having a thickness effective to enable flow of an electrical current through the tunneling barrier layer responsive to an operative electrical bias applied across the first and second electrical contacts, the electrical current exhibiting negative differential resistance for at least some applied electrical bias values, wherein the first electrical contact, the second electrical contact, the semiconducting or semimetallic organic layer, and the tunneling barrier layer define a negative differential resistance polymer diode;
• and
• additional circuit elements interconnected with the negative differential resistance polymer diode to define a mixed signal circuit.