银纳米线触控电极的工艺研究

发布时间：2018-03-09 00:07

本文选题：透明导电　切入点：银纳米线　出处：《北京交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：摘要：透明导电材料一直被ITO所主导,但是随着铟资源短缺、柔性触控的快速发展以及更加廉价工艺的需求,许多替代型材料被人们研究出来。银纳米线材料是最近几年热门的研究方向,但多数限于实验室的应用研究,对于大量工业生产的应用条件还存在较大的空白,本文以量产工艺为条件对银纳米线触控电极的制备展开研究,其中透明导电电极作为ITO替代电极,非透明低电阻电极作为新一代嵌入式触控电极。首先,以银纳米线分散液为材料制备了方块电阻为15Ω/□,透过率为93%的透明导电薄膜,优化溶胶-凝胶制备条件可得到透过率为95%的透明导电薄膜。对制备的薄膜进行了图形化刻蚀研究,通过优化曝光能量、显影时间、刻蚀液和刻蚀条件刻蚀出形貌良好单边偏差为0.95um的触控电极。为了改善触控电极的硬度、粘附性和抗氧化能力,对电极旋涂OC保护层,对比其性能,OC保护层可以提高以上各项性能。其次,使用银纳米线材料制备了方块电阻为0.65Ω/□的低方块电阻薄膜,对比只用溶胶-凝胶方法和溶胶-凝胶与刮涂方式相结合的工艺,证明了通过溶胶-凝胶与刮涂方式相结合的工艺可以得到更加均匀的薄膜,并对其做了SEM与FIB表征。参考透明导电电极的曝光条件,优化了制备低电阻电极时的刻蚀条件,单边偏差接近O。其粘附性良好,对其高温稳定性能进行研究,发现在空气中温度超过250摄氏度氧化迅速,隔绝空气时温度达到300摄氏度银纳米线发生熔化断裂。最后,为了解决工艺中触控电极断线的问题,通过控制银纳米线分散液拉膜方式,制备了阵列取向的银纳米线薄膜,以取向方向制备的电极,其电阻明显降低且断线的几率大大降低。
[Abstract]:Abstract: transparent conductive material has been dominated by ITO, but with the rapid development of indium resources, flexible touch and more cheap technology needs, many alternative materials were developed. The silver nanowire material in recent years is a hot research direction, but most limited to applied research laboratory, there are still large gaps the application conditions of a large number of industrial production, the production process conditions on silver nanowire touch electrode preparation of the transparent conductive electrode as a substitution of ITO electrode, non transparent low resistance electrode as a new generation of embedded touch electrode.
First of all, the silver nanowires dispersion was used as material to prepare the sheet resistance is 15 ohms per square transmittance of transparent conductive film 93%, optimize the sol gel preparation conditions can be obtained through the rate of transparent conductive film 95%. The prepared films were graphical etching, exposure energy, through the the optimal developing time, etching solution and etching conditions of etched morphology good unilateral deviation is touch electrode 0.95um. In order to improve the hardness of the touch electrode, and the antioxidant capacity of electrode adhesion, spin coating OC protective layer, comparing its performance, OC protective layer can be improved by the performance.
Secondly, the use of silver nanowires fabricated sheet resistance for low sheet resistance of 0.65 ohm / - the only technology between the sol-gel method and sol gel coating and the ways of combining the proof process by combining sol-gel and scraping way can get more uniform film, and do the SEM and FIB respectively. The exposure condition reference transparent conductive electrode, the etching conditions for preparing low resistance electrode during the optimization, unilateral deviation close to O. with good adhesive to study its high temperature stability, it is found that the temperature in the air more than 250 degrees Celsius rapidly oxidized, the temperature reached 300 degrees Celsius silver nanowires melt fracture and cut off the air.
Finally, in order to solve the problem of disconnection of touch electrodes in the process, silver coated Nanowire Films with aligned arrays were prepared by controlling the silver nanowire dispersive liquid film pulling mode. The electrode prepared in the direction of orientation decreased significantly, and the probability of disconnection was greatly reduced.

【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TQ150.6

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