School of Chemical Engineering and Materials Science , Chung-Ang University , Seoul 156-756 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4541-4550. doi: 10.1021/acsami.8b17415. Epub 2019 Jan 16.
Metal mesh is a promising material for flexible transparent conducting electrodes due to its outstanding physical and electrical properties. The excellent control of the sheet resistance and transmittance provided by the metal mesh electrodes is a great advantage for microelectronic applications. Thus, over the past decade, many studies have been performed in order to realize high-performance metal mesh; however, the lack of cost-effective fabrication processes and the weak adhesion between the metal mesh and substrate have hindered its widespread adoption for flexible optoelectronic applications. In this study, a new approach for fabricating robust silver mesh without using hazardous organic solvents is achieved by combining colloidal deposition and silver enhancement steps. The adhesion of the metal mesh was greatly improved by introducing an intermediate adhesion layer. Various patterns relevant to optoelectronic applications were fabricated with a minimum feature size of 700 nm, resulting in high optical transmittance of 97.7% and also high conductivity (71.6 Ω sq) of the metal mesh. In addition, we demonstrated an effective transparent heater using the silver mesh with excellent exothermic behavior, which heated up to 245 °C with 7 V applied voltage.
金属网格由于其出色的物理和电气性能，是一种很有前途的柔性透明导电电极材料。金属网格电极提供的出色的电阻和透光率控制，是微电子应用的一大优势。因此，在过去的十年中，已经进行了许多研究，以实现高性能的金属网格；然而，缺乏具有成本效益的制造工艺以及金属网格与基底之间较弱的附着力，阻碍了其在柔性光电应用中的广泛采用。在这项研究中，通过结合胶体沉积和银增强步骤，实现了一种新的制造稳健的银网格的方法，而无需使用危险的有机溶剂。通过引入中间附着层，极大地提高了金属网格的附着力。各种与光电应用相关的图案以最小特征尺寸 700nm 进行制造，从而实现了 97.7%的高光透过率和 71.6Ωsq 的高导电性。此外，我们展示了一种使用具有出色放热性能的银网格的有效透明加热器，在施加 7V 的电压时，它可以加热到 245°C。
