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Laser‐Induced Carbonization of Natural Organic Precursors for Flexible Electronics
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-09-03 , DOI: 10.1002/aelm.202000463 Simon Delacroix 1 , Huize Wang 1 , Tobias Heil 1 , Volker Strauss 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-09-03 , DOI: 10.1002/aelm.202000463 Simon Delacroix 1 , Huize Wang 1 , Tobias Heil 1 , Volker Strauss 1
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A precursor ink for carbon laser‐patterning is developed using inexpensive, naturally abundant molecular compounds, namely citric acid and urea, and used to fine‐print conductive carbon circuits on a flexible substrate. The precursor in the ink consists of organic nanoparticles obtained from the thermal treatment of citric acid and urea. This precursor is thoroughly characterized chemically and structurally. A simple recipe for the ink is then described for the creation of highly reproducible laser‐patterned carbon structures on different substrates. Homogeneous ∼20 µm thick films are cast on different substrates and characterized before and after laser‐carbonization. The carbon content of the final films is 97% and is of turbostratic graphitic nature. As reproducible laser‐induced reactions depend on precise laser conditions, the influence of material properties, film thickness, and laser fluence are thoroughly analyzed. Films on three different substrates, namely aluminum sheets, silicon wafers, and polyethylene terephthalate (PET) are characterized by electrical impedance measurements. Electrical conductivities of up to 5.21 S cm−1 and maximum current densities of 44 A cm−2 are achieved, which proved applicable as fine carbon circuits on PET as a flexible substrate. This study opens a simple synthetic avenue to producing conductive circuit elements based on carbon.
中文翻译：
柔性电子中激光诱导的天然有机前体的碳化
用于碳激光图案化的前体油墨是使用廉价的，自然丰富的分子化合物（即柠檬酸和尿素）开发的，用于在柔性基板上精细印刷导电碳电路。油墨中的前体由柠檬酸和尿素热处理获得的有机纳米颗粒组成。该前体在化学和结构上都得到了彻底的表征。然后介绍一种简单的油墨配方，以在不同的基材上创建高度可重复的激光图案化碳结构。均匀〜20 µm厚的薄膜流延到不同的基材上，并在激光碳化之前和之后进行表征。最终薄膜的碳含量为97％，具有涡轮层石墨性质。由于可重现的激光诱导反应取决于精确的激光条件，彻底分析了材料性能，膜厚和激光通量的影响。通过电阻抗测量来表征三种不同基材（即铝片，硅片和聚对苯二甲酸乙二醇酯（PET））上的薄膜。导电率高达5.21 S cm-1和44 A cm -2的最大电流密度得以实现，这被证明可作为柔性基板在PET上用作细碳电路。这项研究为生产基于碳的导电电路元件开辟了一条简单的合成途径。
更新日期：2020-10-11
中文翻译：
柔性电子中激光诱导的天然有机前体的碳化
用于碳激光图案化的前体油墨是使用廉价的，自然丰富的分子化合物（即柠檬酸和尿素）开发的，用于在柔性基板上精细印刷导电碳电路。油墨中的前体由柠檬酸和尿素热处理获得的有机纳米颗粒组成。该前体在化学和结构上都得到了彻底的表征。然后介绍一种简单的油墨配方，以在不同的基材上创建高度可重复的激光图案化碳结构。均匀〜20 µm厚的薄膜流延到不同的基材上，并在激光碳化之前和之后进行表征。最终薄膜的碳含量为97％，具有涡轮层石墨性质。由于可重现的激光诱导反应取决于精确的激光条件，彻底分析了材料性能，膜厚和激光通量的影响。通过电阻抗测量来表征三种不同基材（即铝片，硅片和聚对苯二甲酸乙二醇酯（PET））上的薄膜。导电率高达5.21 S cm-1和44 A cm -2的最大电流密度得以实现，这被证明可作为柔性基板在PET上用作细碳电路。这项研究为生产基于碳的导电电路元件开辟了一条简单的合成途径。
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