Technology Development of High-Performance Printed Organic Thin-Film Transistors

Abstract

Direct printing of organic thin-film transistors (TFTs) provides cost-efficient and eco-friendly fabrication of electronic applications on flexible substrates with minimal material consumption, high speed and large area. However, despite the improvement of device performance over 30 years, electronics industry still has not adopted printed organic TFTs for manufacturing electronic applications due to their low carrier mobility, non-uniformity, and poor bias-stability. Here, we developed high-performance printed organic TFTs using indacenodithiophene copolymer with benzothiadiazole (IDT-BT) semiconducting polymer. The fabricated devices showed high mobility (>1 cm2/Vs), on/off ratio (>107), uniformity (<10%), and bias-stability (< 5 %). This high-performance printed organic TFTs indicate its high commercial application potential in flexible display backplanes and integrated circuits.