Directly Drawn Organic Transistors by Capillary Pen: A New Facile Patterning Method using Capillary Action for Soluble Organic Materials

摘要

Printed electronics constitute an emerging class of printing technologies with potential applications in photovoltaics, transistors, displays, batteries, antennas, and sensors. Recent attention has focused on the realization of low cost large-area enabling platforms for flexible and disposable devices. High-resolution direct printing techniques are of particular interest as alternatives to the conventional vacuum deposition and photolithographic patterning of functional films, such as gate electrodes, gate dielectrics, source and drain contacts, and semiconductor layers. Among the various direct printing techniques, including micro-contact printing (μ-CP), nano-imprinting, solid state embossing, screen printing, drop-on-demand (DOD) inkjet printing, and roll-to-roll printing, inkjet printing techniques, in which a solution is jetted through a nozzle, have held great potential for the micro- and nano-scale patterning of solution-processed materials. Inkjet printing is amenable to high-throughput processing, yields a high-printing accuracy, and is a simple process. Notwithstanding the apparent advantages of inkjet printing, the technique is limited in its applicability to certain commercial-purpose printing techniques because organic inks are highly sensitive to the jetting condition, including the temperature, viscosity, concentration, and humidity.