喷墨打印银纳米线柔性透明导电薄膜的新见解。
Novel Insights into Inkjet Printed Silver Nanowires Flexible Transparent Conductive Films.
机构信息
Department of Materials and Food, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, China.
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
出版信息
Int J Mol Sci. 2021 Jul 19;22(14):7719. doi: 10.3390/ijms22147719.
Silver nanowire (AgNWs) inks for inkjet printing were prepared and the effects of the solvent system, wetting agent, AgNWs suspension on the viscosity, surface tension, contact angle between ink droplet and poly(ethylene) terephthalate (PET) surface, and pH value of AgNWs ink were discussed. Further, AgNWs flexible transparent conductive films were fabricated by using inkjet printing process on the PET substrate, and the effects of the number printing layer, heat treatment temperature, drop frequency, and number of nozzle on the microstructures and photoelectric properties of AgNWs films were investigated in detail. The experimental results demonstrated that the 14-layer AgNWs printed film heated at 60 °C and 70 °C had an average sheet resistance of 13 Ω∙sq and 23 Ω∙sq and average transparency of 81.9% and 83.1%, respectively, and displayed good photoelectric performance when the inkjet printing parameters were set to the voltage of 20 V, number of nozzles of 16, drop frequency of 7000 Hz, droplet spacing of 15 μm, PET substrate temperatures of 40 °C and nozzles of 35 °C during printing, and heat treatment at 60 °C for 20 min. The accumulation and overflow of AgNWs at the edges of the linear pattern were observed, which resulted in a decrease in printing accuracy. We successfully printed the heart-shaped pattern and then demonstrated that it could work well. This showed that the well-defined pattern with good photoelectric properties can be obtained by using an inkjet printing process with silver nanowires ink as inkjet material.
银纳米线（AgNWs）喷墨打印用油墨的制备及其溶剂体系、润湿剂、AgNWs 悬浮液对油墨粘度、表面张力、液滴与聚对苯二甲酸乙二醇酯（PET）表面接触角、AgNWs 油墨 pH 值的影响进行了讨论。进一步，在 PET 衬底上采用喷墨打印工艺制备了 AgNWs 柔性透明导电薄膜，并详细研究了打印层数、热处理温度、滴频、喷嘴数对 AgNWs 薄膜微观结构和光电性能的影响。实验结果表明，在 60°C 和 70°C 加热的 14 层 AgNWs 打印膜的平均方阻分别为 13 Ω∙sq 和 23 Ω∙sq，平均透光率分别为 81.9%和 83.1%，当喷墨打印参数设置为 20V 电压、16 个喷嘴、7000Hz 滴频、15μm 液滴间距、40°C PET 衬底温度和 35°C 喷嘴温度进行打印，并在 60°C 下热处理 20min 时，显示出良好的光电性能。观察到线性图案边缘处 AgNWs 的堆积和溢出，这导致打印精度下降。我们成功地打印了心形图案，并证明它可以正常工作。这表明，使用喷墨打印工艺，以银纳米线油墨作为喷墨材料，可以获得具有良好光电性能的定义明确的图案。
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