Self-Aligned Megahertz Organic Transistors Solution-Processed on Plastic

The processing of complex nanoscale electronic structures on plastic substrates is a significant challenge, requiring the combination of low temperature, nonaggressive, and high resolution methods. Here a scalable process flow on plastic is presented tbat enables the fabrication of flexible nano-imprinted organic field-effect transistors (OFETs) with self-aligned contacts and solution-processed semiconductor and dielectric layers, at processing temperatures <= 150 degrees C. OFETs are fabricated with device cutoff frequencies f > 1 MHz at low operating bias V-DS = -15 V. The technique allows the patterning of metal structures over four orders of magnitude from 375 nm to 1 mm without the need for a rigid carrier, and provides a fabrication pathway to high performance nanostructured organic circuitry.