| 초록 |
In a recent decade, the development of highly conductive, printable electrodes have tremendous attention in various research fields as the most important constituent components for large-area, low-cost electronics. In terms of an indispensable sintering process for generating electrodes from printable metallic nanomaterials, a flash-light based sintering technique has been regarded as a viable approach for continuous roll-to-roll processes. In this study, in order for satisfying these requisites in both of material and process, we report cost-effective, printable Cu electrodes that can be applicable to vulnerable polyethylene terephthalate (PET) substrates, by incorporating a heretofore-unrecognized ultrathin plasmonic thermal/optical barrier, which is composed of 30 nm-thick Ag nanoparticle layer. The different plasmonic behaviors during a flash-light-sintering process are investigated for both Ag and Cu nanoparticles, based on a combinatorial interpretation for experimental results and theoretical calculations. It is demonstrated that by a continuous printing process and a continuous flash-light-sintering process, the large-area Cu electrodes are formed successfully on PET substrates, with a sheet resistance of 0.24 Ω/square and a resistivity of 22.6 μΩ·cm. |
