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Morphological Regulation of Printed Low-Temperature Conductive Ink
Langmuir ( IF 3.7 ) Pub Date : 2022-07-27 , DOI: 10.1021/acs.langmuir.2c01249 Taijiang Liu 1 , Runpeng Guo 2 , Yubin Fu 1 , Jie Zhao 1 , Honglong Ning 1 , Zhiqiang Fang 3 , Zhihao Liang 1 , Xiaoqin Wei 4 , Rihui Yao 1 , Junbiao Peng 1
Langmuir ( IF 3.7 ) Pub Date : 2022-07-27 , DOI: 10.1021/acs.langmuir.2c01249 Taijiang Liu 1 , Runpeng Guo 2 , Yubin Fu 1 , Jie Zhao 1 , Honglong Ning 1 , Zhiqiang Fang 3 , Zhihao Liang 1 , Xiaoqin Wei 4 , Rihui Yao 1 , Junbiao Peng 1
Affiliation
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The unbalanced evaporation of solvents in low-temperature sintered inks for printed electronics leads to a series of problems in the actual printing process, including printed pattern distortion, surface cracking, and the coffee ring effect, which has become a serious obstacle to this technique. Here, we present a comprehensive investigation of the influence of the solvent composition, environmental, and sintering conditions on the complicated pattern formation process of reactive silver inks. The results first showed that only inks with a certain wettability of solvents could form well-defined patterns. Then, the solvent composition and ambient humidity can be adjusted to balance the nonequilibrium evaporative flow within the liquid and thus to obtain a flat liquid film. Combined with the rapid UV sintering process, the particle size, porosity, and roughness could be controlled to produce dense and homogeneous silver films. Finally, we successfully printed silver electrodes with a smooth and dense surface (Rqs ∼ 21 nm in 0.8 × 0.8 mm2 area and less than 1% porosity) under an optimized relative humidity (RH) of 50–60% at room temperature with the solvent composition of IPA (isopropanol)/2,3-BD (2,3-butanediol) = 8:2. In addition, we also demonstrated high-performance Pr–IZO (praseodymium-doped indium–zinc oxide) thin film transistors (TFTs) with a mobility (μsat) of 2.14 cm2/V/s and Ion/Ioff ratio of over 107 using source–drain electrodes printed under optimized conditions.
中文翻译：
印刷低温导电油墨的形态调控
印刷电子用低温烧结油墨中溶剂的不平衡蒸发导致实际印刷过程中出现的一系列问题，包括印刷图案变形、表面开裂、咖啡环效应等，已成为该技术的严重障碍。在这里，我们全面研究了溶剂组成、环境和烧结条件对活性银油墨复杂图案形成过程的影响。结果首先表明，只有具有一定溶剂润湿性的油墨才能形成清晰的图案。然后，可以调节溶剂组成和环境湿度以平衡液体内的非平衡蒸发流动，从而获得平坦的液膜。结合快速紫外烧结工艺，粒度、孔隙率、并且可以控制粗糙度以产生致密且均匀的银膜。最后，我们成功打印出表面光滑致密的银电极（R qs ∼ 21 nm in 0.8 × 0.8 mm 2 area and小于 1% porosity) 在优化的相对湿度 (RH) 为 50-60% 室温下，溶剂组合物为 IPA（异丙醇）/2,3-BD (2,3-丁二醇) = 8:2。此外，我们还展示了迁移率 (μ sat ) 为 2.14 cm 2 /V/s 和I on / I off比为超过 10 7使用在优化条件下印刷的源漏电极。
更新日期：2022-07-27
中文翻译：
印刷低温导电油墨的形态调控
印刷电子用低温烧结油墨中溶剂的不平衡蒸发导致实际印刷过程中出现的一系列问题，包括印刷图案变形、表面开裂、咖啡环效应等，已成为该技术的严重障碍。在这里，我们全面研究了溶剂组成、环境和烧结条件对活性银油墨复杂图案形成过程的影响。结果首先表明，只有具有一定溶剂润湿性的油墨才能形成清晰的图案。然后，可以调节溶剂组成和环境湿度以平衡液体内的非平衡蒸发流动，从而获得平坦的液膜。结合快速紫外烧结工艺，粒度、孔隙率、并且可以控制粗糙度以产生致密且均匀的银膜。最后，我们成功打印出表面光滑致密的银电极（R qs ∼ 21 nm in 0.8 × 0.8 mm 2 area and小于 1% porosity) 在优化的相对湿度 (RH) 为 50-60% 室温下，溶剂组合物为 IPA（异丙醇）/2,3-BD (2,3-丁二醇) = 8:2。此外，我们还展示了迁移率 (μ sat ) 为 2.14 cm 2 /V/s 和I on / I off比为超过 10 7使用在优化条件下印刷的源漏电极。
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