High Frequency Solution‐Processed Organic Field‐Effect Transistors with High‐Resolution Printed Short Channels

Organic electronics is an emerging technology that enables the fabrication of devices with low-cost and simple solution-based processes at room temperature. In particular, it ideal candidate for Internet Things since can be easily integrated in everyday objects, potentially creating a distributed network wireless communicating electronics. Recent efforts allowed to boost operational frequency organic field-effect transistors (OFETs), required achieve efficient communication. However, majority cases, order increase dynamic performances OFETs, masks based lithographic techniques are used reduce device critical dimensions, such as channel overlap lengths. This study reports successful integration direct written metal contacts defining 1.4 µm short channel, printed ultra-precise deposition technique (UPD), fully solution fabricated n-type OFETs. An average transition high 25.5 MHz achieved 25 V. result demonstrates potential additive, high-resolution direct-writing operating high-frequency regime.