Seo Hyeong-Jin, Nah Yoon-Chae, Kim Han-Ki
School of Advanced Materials Science & Engineering, Sungkyunkwan University 2066 Seobu-ro Jangan-gu, Suwon Gyeonggi-do 440-746 Republic of Korea
IPCE, Dept. of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education Cheonan 31253 Republic of Korea.
RSC Adv. 2018 Jul 30;8(47):26968-26977. doi: 10.1039/c8ra03252a. eCollection 2018 Jul 24.
We fabricated cost-effective Cu O/Cu/Cu O multilayer grid electrodes using roll-to-roll (RTR) sputtering and patterning processes for use as transparent and flexible electrodes in flexible smart windows. To optimize the patterned Cu O/Cu/Cu O multilayer grid, the electrical and optical properties of the Cu O/Cu/Cu O multilayer grid electrodes were investigated as a function of grid width and pitch, which directly influence the filling factor of the grid. At the optimized grid width of 16 and pitch of 600 μm, the Cu O/Cu/Cu O multilayer grid had a sheet resistance of 7.17 Ohm per square and an optical transmittance of 87.6%. In addition, the mechanical properties of the optimized Cu O/Cu/Cu O multilayer grid electrode was compared to those of brittle ITO electrodes to demonstrate its outstanding flexibility. To show the potential of the Cu O/Cu/Cu O multilayer grid for smart windows, we fabricated a flexible and transparent thin film heater (TFH) and a flexible electrochromic (EC) device, which are key components of smart windows. The low saturation voltage of the Cu O/Cu/Cu O grid-based TFH and the fast on-off performance of the Cu O/Cu/Cu O grid-based EC device indicates that the RTR-processed Cu O/Cu/Cu O multilayer grid is promising as a low-cost and large-area flexible transparent electrode for high-performance smart windows.
我们采用卷对卷（RTR）溅射和图案化工艺制备了具有成本效益的CuO/Cu/CuO多层网格电极，用作柔性智能窗中的透明柔性电极。为了优化图案化的CuO/Cu/CuO多层网格，研究了CuO/Cu/CuO多层网格电极的电学和光学性能随网格宽度和间距的变化，这直接影响网格的填充因子。在优化的网格宽度为16μm、间距为600μm时，CuO/Cu/CuO多层网格的方阻为7.17Ω/sq，光学透过率为87.6%。此外，将优化后的CuO/Cu/CuO多层网格电极的机械性能与脆性ITO电极的机械性能进行了比较，以证明其出色的柔韧性。为了展示CuO/Cu/CuO多层网格在智能窗方面的潜力，我们制备了柔性透明薄膜加热器（TFH）和柔性电致变色（EC）器件，它们是智能窗的关键组件。基于CuO/Cu/CuO网格的TFH的低饱和电压和基于CuO/Cu/CuO网格的EC器件的快速开关性能表明，经RTR工艺处理的CuO/Cu/CuO多层网格有望成为用于高性能智能窗的低成本大面积柔性透明电极。
