• Anthony, John E.
• Kirmani, Ahmad
• Smilgies, Detlef-M.
• Wang, Qingxiao
• Pan, Wenyang
• Payne, Marcia M.
• Li, Ruipeng
• Giannelis, Emmanuel P.

Abstract

Solution-printed organic semiconductors have emerged in recent years as promising contenders for roll-to-roll manufacturing of electronic and optoelectronic circuits. The stringent performance requirements for organic thin-film transistors (OTFTs) in terms of carrier mobility, switching speed, turn-on voltage and uniformity over large areas require performance currently achieved by organic single-crystal devices, but these suffer from scale-up challenges. Here we present a new method based on blade coating of a blend of conjugated small molecules and amorphous insulating polymers to produce OTFTs with consistently excellent performance characteristics (carrier mobility as high as 6.7 cm2 V−1 s−1, low threshold voltages of<1 V and low subthreshold swings <0.5 V dec−1). Our findings demonstrate that careful control over phase separation and crystallization can yield solution-printed polycrystalline organic semiconductor films with transport properties and other figures of merit on par with their single-crystal counterparts.

Topics

• polymer
• single crystal
• amorphous
• phase
• mobility
• semiconductor
• crystallization