期刊
ACS NANO
卷 9, 期 5, 页码 5440-5446出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b01243
关键词
graphene; silver; hierarchical structure; transparent conductors; flexible devices
类别
资金
- NSF [1233151, 1235979]
- Mascaro Center for Sustainable Innovation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1235979] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1233151] Funding Source: National Science Foundation
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 Omega/sq and a direct current to optical conductivity ratio sigma(dc)/sigma(op) 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.
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