ACS Nano. 2015 May 26;9(5):5440-6. doi: 10.1021/acsnano.5b01243. Epub 2015 May 11.
We report an experimental study on the fabrication and characterization of hierarchical graphene/metal grid structures for transparent conductors. The hierarchical structure allows for uniform and local current conductivity due to the graphene and exhibits low sheet resistance because the microscale silver grid serves as a conductive backbone. Our samples demonstrate 94% diffusive transmission with a sheet resistance of 0.6 Ω/sq and a direct current to optical conductivity ratio σdc/σop of 8900. The sheet resistance of the hierarchical structure may be improved by over 3 orders of magnitude and with little decrease in transmission compared with graphene. Furthermore, the graphene protects the silver grid from thermal oxidation and better maintains the sheet resistance of the structure at elevated temperature. The graphene also strengthens the adhesion of the metal grid with the substrate such that the structure is more resilient under repeated bending.
我们报告了一项关于用于透明导体的分层石墨烯/金属网格结构的制造和特性的实验研究。由于石墨烯的存在，分层结构允许均匀和局部的电流传导，并具有低的面电阻，因为微尺度的银网格充当了导电骨架。我们的样品展示了 94%的扩散传输，面电阻为 0.6 Ω/sq，直流至光导率比 σdc/σop 为 8900。与石墨烯相比，分层结构的面电阻可能提高 3 个数量级以上，而传输损耗却很小。此外，石墨烯可以保护银网格免受热氧化，并在高温下更好地保持结构的面电阻。石墨烯还增强了金属网格与基底的附着力，使得结构在反复弯曲下更具弹性。
