  Organic printed electronics is proving its suitability for the development of
wearable, lightweight, distributed applications in combination with
cost-effective production processes. Nonetheless, some necessary features for
several envisioned disruptive mass-produced products are still lacking: among
these radio-frequency (RF) communication capability, which requires high
operational speed combined with low supply voltage in electronic devices
processed on cheap plastic foils. Here, we demonstrate that high-frequency,
low-voltage, polymer field-effect transistors can be fabricated on plastic with
the sole use of a combination of scalable printing and digital laser-based
techniques. These devices reach an operational frequency in excess of 1 MHz at
the challengingly low bias voltage of 2 V, and exceed 14 MHz operation at 7 V.
In addition, when integrated into a rectifying circuit, they can provide a DC
voltage at an input frequency of 13.56 MHz, opening the way for the
implementation of RF devices and tags with cost-effective production processes.
