One important technical hurdle that has to be overcome for using organic transistors in radio-frequency identification tags is for these devices to operate at rf frequencies (typically 13.56MHz) in the front end. It was long thought that organic transistors are too slow for this. In this letter we show that organic transistor based full-wave rectifier circuits utilizing pentacene, a p-channel organic semiconductor, can operate at this frequency with a useful efficiency. In order to achieve such high-frequency operation, we make use of the nonquasistatic state of the transistors.

Organic materials offer the possibility of printing flexible electronic devices with large area coverage in a printing press. Usually this vision conflicts with the requirement of high-resolution feature formation. The authors demonstrate here that thin film transistors with 2μm channel length can be printed using a reel-to-reel compatible process. The development of a dry printing method used in combination with a high-resolution, solvent resistant plates, and sintered metallic nanoinks enables high-resolution printing of functional liquid inks. In addition, dry printing allows for the sequential printing of solid films overcoming the severe solvent incompatibility issues faced by standard printing techniques.

No abstract

No abstract

No abstract