Roll‐to‐Roll Reverse‐Offset Printing Combined with Photonic Sintering Process for Highly Conductive Ultrafine Patterns,Advanced Engineering Materials

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Roll‐to‐Roll Reverse‐Offset Printing Combined with Photonic Sintering Process for Highly Conductive Ultrafine Patterns
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-03 , DOI: 10.1002/adem.202000463
Zhaoyang Zhong ₁ , Pyeongsam Ko _{1,

2} , Jae Young Seok ₁ , Hyuntae Kim ₁ , Sin Kwon ₁ , Hongseok Youn ₂ , Kyoohee Woo ₁

Affiliation

Herein, a roll‐to‐roll (R2R) continuous reverse‐offset (RO) printing process combined with an intense pulsed light (IPL) sintering technique for the mass production of Ag nanoparticles (NPs)‐based highly conductive, ultrafine patterns on the low‐cost, heat‐sensitive polyethylene terephthalate (PET) substrate is first explored. Variations in printing quality depending on the ink‐coating thickness and the applied pressure during the off process and printing times are observed. By these observations, their effects on pattern quality are identified, and the blanket swelling responsible for printing stability degradation is solved using infrared (IR) exposure. By analyzing the thermal behavior of RO ink, the microstructures of patterns as IPL irradiation conditions are investigated. Contrary to the case of high‐power light for a short time, a steady and gradual volume change is induced in the pattern irradiated by low‐power light for a long time so that cracks and pores are considerably suppressed. The R2R inline production of densely sintered mesh (less than ≈10 μm) transparent electrodes (R_s = 9.86 ± 0.36 Ω sq⁻¹ at T ≈ 90%) is successfully demonstrated via successive IPL irradiations synchronized with printing velocity. Finally, the potential use of R2R‐produced electrodes is clearly proved by fabricating flexible organic light‐emitting diodes (OLEDs).

中文翻译：

卷对卷反胶印与光子烧结工艺相结合的高导电性超细图案

此处，采用卷对卷（R2R）连续反向胶版（RO）印刷工艺，结合强脉冲光（IPL）烧结技术，在该纳米棒上批量生产基于Ag纳米粒子（NP）的高导电性，超精细图案首次探索了低成本，热敏性聚对苯二甲酸乙二醇酯（PET）基材。观察到印刷质量随油墨涂布厚度和关闭过程中所施加的压力以及印刷时间而变化。通过这些观察，可以确定它们对图案质量的影响，并使用红外（IR）曝光解决了导致印刷稳定性下降的橡皮布膨胀问题。通过分析RO油墨的热行为，研究了IPL辐照条件下图案的微观结构。与短时间内大功率照明的情况相反，长时间低功率光照射的图案会引起体积的稳定且逐渐变化，从而大大抑制了裂缝和气孔。R2R在线生产密集烧结网（小于≈10μm）透明电极（ř_小号 = 9.86±0.36Ω平方^-1在Ť ≈90％）通过与打印速度同步连续IPL照射被成功地证明。最后，通过制造柔性有机发光二极管（OLED）清楚地证明了R2R产生的电极的潜在用途。

更新日期：2020-06-03

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