2D metallic grids that consist of various nanomaterials that are suitable for the replacement of indium tin oxide in transparent electronics (TEs) manufacturing. High‐resolution conductive grids with large open areas are often required while considering high transmittance. However, previous research shows that this kind of TE often cannot have high transmittance and low sheet resistance simultaneously; it hinders the fabrication techniques and materials from practical applications. Herein, direct fabrication of a high‐performance TE through electrohydrodynamic jet 3D printing technique is reported. Micro‐scale 3D metallic grids with an aspect ratio of above‐5 were printed on a polyester film using Ag nanoparticles. The metal grids with high aspect ratios exhibit an average sheet resistance of 3 Ω sq⁻¹ and transparency of 96%. Both optical and electrical performances are significantly enhanced for which the large cross‐section of the metallic grid is contributed. Furthermore, the flexibility of printed TE is also characterized by the bending and recovering test. It is believed that the printed flexible TE, which utilize a high aspect ratio, 3D metallic grids may replace the conventional ITO glass for which both high transmittance and conductivity are achieved with economic efficiency.

中文翻译：

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电动流体喷射印刷3D金属网格：朝向高性能透明电极

由各种纳米材料组成的2D金属网格，适用于在透明电子（TE）制造中替代氧化铟锡。考虑到高透射率，通常需要具有大开口区域的高分辨率导电网格。但是，以往的研究表明，这种TE常常不能同时具有高透射率和低薄层电阻。它阻碍了制造技术和材料的实际应用。本文报道了通过电动流体喷射3D打印技术直接制造高性能TE的方法。使用银纳米颗粒，将长宽比大于5的微型3D金属网格打印在聚酯薄膜上。高纵横比的金属栅格的平均薄层电阻为3Ωsq ^-1透明度为96％。光学和电学性能均得到显着提高，这是因为金属栅格的横截面较大。此外，印刷的TE的挠性还通过弯曲和恢复测试来表征。可以相信，利用高纵横比的3D金属栅格的印刷柔性TE可以代替常规的ITO玻璃，对于传统的ITO玻璃而言，其既具有高透射率又具有高导电率，并且具有经济效益。