Organic semiconductor-based thin-film transistors’ (TFTs) charge-carrier mobility has been enhanced up to 25 cm2/V s through the improvement of fabrication methods and greater understanding of the microstructure charge-transport mechanism. To expand the practical feasibility of organic semiconductor-based TFTs, their electrical properties should be easily accessed from the fully printed devices through a scalable printing method, such as a roll-to-roll (R2R) gravure. In this study, four commercially available organic semiconductors were separately formulated into gravure inks. They were then employed in the R2R gravure system (silver ink for printing gate and drain–source electrodes and BaTiO3 ink for printing dielectric layers) for printing 20 × 20 TFT-active matrix with the resolution of 10 pixels per inch on poly(ethylene terephthalate) (PET) foils to attain electrical properties of organic semiconductors a practical printing method. Electrical characteristics (mobility, on–off current ratio, threshold voltage, and transconductance) of the R2Rgravure-printed 20 × 20 TFT-active matrices fabricated with organicsemiconducting ink were analyzed statistically, and the results showedmore than 98% device yield and 50 % electrical variations inthe R2R gravure TFT-active matrices along the PET web.
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机译：通过改进制造方法和对微结构电荷传输机制的了解，有机半导体薄膜晶体管（TFT）的载流子迁移率提高到25 cm 2 / V s 。为了扩大基于有机半导体的TFT的实际可行性，应通过可缩放的印刷方法（例如，卷对卷（R2R）凹版印刷）从完全印刷的设备中轻松获取其电性能。在这项研究中，将四种可商购的有机半导体分别配制到凹版印刷油墨中。然后将它们用于R2R凹版印刷系统（用于印刷栅电极和漏源电极的银油墨和用于印刷介电层的BaTiO3油墨）用于印刷20×20 TFT有源矩阵，其在聚对苯二甲酸乙二醇酯上的分辨率为每英寸10像素）（PET）箔以获得有机半导体的电性能的一种实用印刷方法。 R2R的电气特性（迁移率，开关电流比，阈值电压和跨导）凹版印刷的20×20 TFT有源矩阵，由有机材料制成对半导体油墨进行统计分析，结果表明超过98％的器件良率和50％的电气变化沿PET网的R2R凹版TFT有源矩阵。
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