| 초록 |
Improvement of the optical transmission of polymer substrates is a critical requirement in order for polymers to replace conventional glass panels in a range of optical and optoelectronic applications because polymers usually transmit a lower degree of light than glasses. If a simple vacuum coating method produces an antireflective (AR) pattern of oxide nanoparticles on polymer substrates, it resolves the technical dilemmas that arise from the currently available fabrication methods, which include complicated nanolithography and solution-based coating. This would enable the realization of cost effective, high-throughput fabrication processes for highly transparent coatings on large-are polymer substrates. In this study, we report that a novel periodic AR structure of various oxide nanoparticles, including dielectric or conductive oxides, can be directly grown on polyethylene terephthalate (PET) polymer substrates by a conventional vacuum coating process using either simple sputtering or chemical vapor deposition. The nanoparticle layers provide highly efficient broadband AR characteristics in the visible range. This novel nanoarray structure and its fabrication methodology can be used for coating large-area transparent conducting electrodes on heat-sensitive polymer substrates, a goal unrealizable through currently available fabrication methods. |
