A direct-writing fabrication process for fully inkjet-printed short-channel organic thin-film transistors (OTFTs) has been developed. Channels as narrow as 800 nm between two printed Ag electrodes were achieved by printing a special Ag ink on an SU-8 interlayer, which can be partially dissolved by the solvents used in the Ag ink. The ridge formed along the printed Ag line edges due to redistribution of the interlayer material during the drying process limits the ink spread, and separates neighboring printed lines, and is the key to defining an ultra-narrow channel for transistor fabrication. The short-channel OTFTs fabricated using this technique have demonstrated well-defined linear and saturation regimes. An extracted mobility of 0.27 cm²/Vs with an on/off ratio of 10⁵ was obtained at a driving voltage of −12 V. The excellent performance of these devices demonstrates the potential of this technique in fabrication of short-channel devices using standard printing technologies.

已经开发出用于完全喷墨印刷的短通道有机薄膜晶体管（OTFT）的直接写入制造工艺。通过在SU-8中间层上印刷一种特殊的Ag油墨，可以在两个印刷的Ag电极之间形成800 nm的窄通道，该油墨可以被Ag油墨中使用的溶剂部分溶解。由于在干燥过程中中间层材料的重新分布，沿着印刷的Ag线边缘形成的脊限制了油墨的散布，并分隔了相邻的印刷线，这是定义用于晶体管制造的超窄通道的关键。使用这种技术制造的短通道OTFT已经证明了定义明确的线性和饱和状态。抽取的迁移率为0.27 cm ² / Vs，开/关比为10 ⁵ 在-12 V的驱动电压下获得了λ。这些器件的出色性能证明了该技术在使用标准印刷技术制造短通道器件中的潜力。