Abstract
Organic thin-film transistors TFTs, composed of a conductor, a dielectric, and a semiconductor in a multilayered structure, have become a research focus for potential application in low-cost disposable electronic devices, such as smart cards and radio-frequency identification tags, as well as in flexible-display driver circuits, nonvolatile memories, and sensors. 1-7 In particular, the easy solution processability associated with organic semiconductors drives recent research interests, focusing on printed flexible electronic and display applications. Ink-jet printing and other solution-based deposition methods have been extensively adopted for the fabrication of printed TFTs. However, not all of the component layers in organic TFTs OTFTs have been solution-processed; instead, vacuum deposition or photolithography are utilized for the creation of at least one layer in the device structure. 8-13
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