Organic printable dielectric layers are required for next-generation electronic circuits, particularly those used as gate insulators (GIs) in organic field-effect transistors (OFETs). Herein, optimized electrohydrodynamic (EHD) jet printing with an electrostatic force-assisted mode is suggested for the fabrication of polyvinyl alcohol (PVA)-based dielectric patterns after careful consideration of the ink system. The PVA molecules maintain good solubility in polar solvents, even when a crosslinking agent is added, which enables a continuous PVA jet stream with a width smaller than the diameter of the nozzle to be stably obtained. Subsequent EHD printing produces uniform PVA patterns with a smooth surface morphology suitable for the crystal growth of overlying organic semiconductors. The addition of a crosslinking agent in PVA results in direct GI patterns that exhibit superior insulating properties with high dielectric strength as compared with PVA without crosslinking agents. The OFETs with PVA-based GIs prepared with EHD printing show stable operation with low gate leakage currents. In addition, the feasibility of EHD-printed PVA layers is demonstrated for application as GIs in organic complementary logic gates.

中文翻译：

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用于有机集成器件的电流体动力印刷聚乙烯醇基栅极绝缘体

下一代电子电路需要有机可印刷介电层，特别是在有机场效应晶体管 (OFET) 中用作栅极绝缘体 (GI) 的那些。在此，在仔细考虑油墨系统后，建议使用静电力辅助模式优化电流体动力学 (EHD) 喷射印刷来制造基于聚乙烯醇 (PVA) 的介电图案。PVA分子在极性溶剂中保持良好的溶解性，即使在添加交联剂的情况下，也能稳定地获得宽度小于喷嘴直径的连续PVA射流。随后的 EHD 打印产生均匀的 PVA 图案，其表面形态光滑，适合上覆有机半导体的晶体生长。与没有交联剂的 PVA 相比，在 PVA 中添加交联剂导致直接 GI 图案表现出优异的绝缘性能和高介电强度。通过 EHD 打印制备的具有基于 PVA 的 GI 的 OFET 显示出稳定的运行和低栅极漏电流。此外，证明了 EHD 印刷 PVA 层在有机互补逻辑门中用作 GI 的可行性。