Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a primary candidate for the conductive material in printable electronics. Currently, lateral resolutions down to only 30 μm have been demonstrated for roll-to-roll (R2R)-compatible PEDOT:PSS printing. However, increasing lateral resolution of the printing technique can increase the complexity/ability of printed devices. Topographical discontinuous dewetting (TDD) and liquid-bridge transfer (LBT) is employed as a high-resolution, scalable, R2R-compatible patterning technique to fabricate PEDOT:PSS patterns with down to 400 nm lateral resolution and high thicknesses. PEDOT:PSS ink dispersions were prepared with water/ethanol/cosolvent mixtures to enable the TDD process and ensure high conductivity. After transfer by LBT to target substrates, an impressive average conductivity of 20.5 S cm⁻¹ was measured for the transferred PEDOT:PSS patterns without any post-transfer conductivity-enhancing treatments. Post-transfer conductivity-enhancing treatments were applied that are device fabrication-compatible (acid-free) with very high conductivities up to ∼2590 S cm⁻¹ and average conductivity of ∼1190 S cm⁻¹ for PEDOT:PSS lines patterns fabricated with 4.3% dimethylformamide (DMF) cosolvent. Interestingly, DMF cosolvent in the PEDOT:PSS ink dispersion formed higher conductivity line patterns due to different drying dynamics. This work demonstrates a path to achieve high-resolution, scalable, R2R-compatible printing of PEDOT:PSS patterns while maintaining very high conductivities for future advanced printable electronic devices.

中文翻译：

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用于可印刷电子产品的高导电 PEDOT:PSS 的高分辨率和可扩展印刷

聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）是可印刷电子产品中导电材料的主要候选材料。目前，已证明卷对卷 (R2R) 兼容的 PEDOT:PSS 打印的横向分辨率低至 30 μm。然而，增加印刷技术的横向分辨率会增加印刷设备的复杂性/能力。地形不连续去湿 (TDD) 和液桥转移 (LBT) 被用作高分辨率、可扩展、兼容 R2R 的图案化技术，以制造具有低至 400 nm 横向分辨率和高厚度的 PEDOT:PSS 图案。PEDOT:PSS 油墨分散体是用水/乙醇/助溶剂混合物制备的，以实现 TDD 过程并确保高导电性。通过 LBT 转移到目标基板后，^-1是针对转移的 PEDOT:PSS 图案测量的，没有任何转移后电导率增强处理。转移后导电性增强处理已应用的是器件制造兼容的具有非常高的电导率高达~2590小号厘米（无酸） ^-1和~1190小号厘米平均电导率^-1为PEDOT：PSS的图案线与制造4.3% 二甲基甲酰胺 (DMF) 助溶剂。有趣的是，由于不同的干燥动力学，PEDOT:PSS 油墨分散体中的 DMF 助溶剂形成了更高导电性的线条图案。这项工作展示了实现高分辨率、可扩展、兼容 R2R 的 PEDOT:PSS 图案打印的途径，同时为未来的先进可打印电子设备保持非常高的导电性。