Insulator-Conductor Type Transitions in Graphene-Modified Silver Nanowire Networks: A Route to Inexpensive Transparent Conductors
Insulator-Conductor Type Transitions in Graphene-Modified Silver Nanowire Networks: A Route to Inexpensive Transparent Conductors
复制标题
石墨烯改性银纳米线网络中的绝缘体-导体类型转变：廉价透明导体的途径
DOI：
10.1002/adfm.201402547
复制
发表时间：
2014
影响因子：
19
通讯作者：
Jurewicz I
中科院分区：
文献类型：
--
作者：
Jurewicz I
银纳米线涂层是用于生产透明导体的氧化铟锡的有吸引力的替代品。为了制造触摸屏显示器所需的低薄层电阻涂层，必须生产银纳米线的多层网络，但这可能不具有成本效益。这里通过导电石墨烯片的局部沉积来改变超低密度纳米线网络的电性能来解决这个问题。与其他溶液加工材料（例如氧化石墨烯）不同，我们的原始石墨烯不含氧官能团，因此无需进一步化学处理即可导电。在线连接处的石墨烯吸附以及连接相邻电线的石墨烯有助于显着增强电性能。使用我们的方法，生产可行的透明电极所需的纳米线数量可能比同等的原始高密度纳米线网络少 50 倍以上，因此具有重大的商业意义。结果表明，使用激光烧蚀工艺，所得薄膜可以图案化为单独的电极结构，这是触摸屏传感器制造的先决条件。
Silver nanowire coatings are an attractive alternative to indium tin oxide for producing transparent conductors. To fabricate coatings with low sheet resistance required for touchscreen displays, a multi‐layer network of silver nanowires must be produced that may not be cost effective. This problem is counteracted here by modifying the electrical properties of an ultra‐low‐density nanowire network through local deposition of conducting graphene platelets. Unlike other solution‐processed materials, such as graphene oxide, our pristine graphene is free of oxygen functional groups, resulting in it being electrically conducting without the need for further chemical treatment. Graphene adsorption at inter‐wire junctions as well as graphene connecting adjacent wires contributes to a marked enhancement in electrical properties. Using our approach, the amount of nanowires needed to produce viable transparent electrodes could be more than 50 times less than the equivalent pristine high density nanowire networks, thus having major commercial implications. Using a laser ablation process, it is shown that the resulting films can be patterned into individual electrode structures, which is a pre‐requisite to touchscreen sensor fabrication.