| 초록 |
When an electromagnetic wave impinges on a conductor, most of the incident wave is reflected, which makes metals and transparent conducting oxides (TCOs), such as tin-doped indium oxide (ITO), opaque to visible light (429–750 THz) and far-infrared (FIR) (＜ 20 THz). This incompatibility between optical transparency and electrical conductivity is well-defined fundamental material properties, but this is often not easy to enhance both simultaneously. Opacity due to electrical conductivity is more pronounced in the lower frequency range. This fundamental incompatibility creates a barrier for the realization of enhanced user-interface and device integration. We present a design strategy for preparing megahertz-range transparent conductor and a concept towards ‘device-to-device integration’ enabled by electromagnetic wave transmittance. The approach to the properties of conductors is verified using a conducting polymer, Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), whose microstructure is effectively controlled by solution process. The use of a transparent conducting polymer as an electrode enables the fabrication of a fully functional touch-controlled display device and magnetic resonance imaging (MRI)-compatible biomedical monitoring device, which would open up a new paradigm for transparent conductors. |
