Solution Processed High Performance Short Channel Organic Thin-Film Transistors with Excellent Uniformity and Ultra-low Contact Resistance for Logic and Display

High performance organic thin-film transistors (OTFTs) are fabricated by using normal spin-coating processes with the highest processing temperature of 115 °C, The devices present negligible contact resistance and excellent uniformity over 4 inch area. An average mobility higher than 4 cm
²
/V·s is achieved with 7 μm channel length devices. Ring oscillators and AMOLED displays based on the OTFTs are demonstrated. A dual gate structure is implemented to tune the threshold voltage of the OTFTs for improving the compensation and gray-level adjusting capability of an AMOLED in-pixel compensation circuit.