Improved Contact Properties of Spray-Coated AgNWs Source and Drain Electrodes in Oxide Thin-Film Transistors
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초록
내용
In this study, source and drain electrodes were prepared with silver nanowires (AgNWs) using spray coating and hot press techniques. Though the spray coating allows AgNWs patterns to be functioned as electrodes in oxide TFT, but as-sprayed films do not have good physical contact with oxide semiconductors but form an interspace that impedes electron injection into the semiconductors. Hot press produces denser AgNWs networks that were tightly contacted with the oxide semiconductors, where the hot-pressed films are considered as satisfactory source and drain electrodes for high-performance oxide TFTs with providing an easy electron injection. Finally, the resulting oxide TFTs with hot-pressed AgNWs electrodes are found to exhibit field-effect mobility up to 4.75 ± 1.5 cm2/Vs, much better than those of the TFTs with as-sprayed AgNWs electrodes. This was supported by Korea National University of Transportation in 2020.