Jung Hyunsu, Go Hyeck, Park Gye-Choon, Kim Seongku, Yun Changhun
Center for Nano-Photonics Convergence Technology, Korea Institute of Industrial Technology (KITECH), Gwangju, 61012, Korea.
Department of Electrical Engineering, Mokpo National University, Muan, 58554, Korea.
J Nanosci Nanotechnol. 2019 Apr 1;19(4):2044-2048. doi: 10.1166/jnn.2019.16114.
The new stretchable transparent electrode was proposed and fabricated based on a process which utilizes silver nanowires (AgNWs) on a Polyurethane (PU) substrate. In order to overcome the rough surface nature of the silver nanowire electrode, a titanium oxide (TiO₂) buffer layer was over-coated and then followed by a heat treatment of organo-metalic sol-gel solution. The fabricated stretchable electrodes exhibit electrical sheet resistance of 24 Ω/□, transmittance of 78% at 550 nm wavelength and average surface roughness of less than 5 nm. In addition, without adding additional conductive polymer layers, the fabricated AgNW-based electrode can maintain its initial electrical resistance even if nearly 130% strain is applied. In this letter, the critical role of a TiO₂ buffer layer in achieving the high performance of the AgNW stretchable electrode is discussed.
基于一种在聚氨酯（PU）基板上利用银纳米线（AgNWs）的工艺，提出并制造了新型可拉伸透明电极。为了克服银纳米线电极表面粗糙的特性，在其表面包覆了一层氧化钛（TiO₂）缓冲层，然后对有机金属溶胶 - 凝胶溶液进行热处理。所制备的可拉伸电极的方阻为24Ω/□，在550nm波长处的透过率为78%，平均表面粗糙度小于5nm。此外，在不添加额外导电聚合物层的情况下，所制备的基于AgNW的电极即使施加近130%的应变也能保持其初始电阻。在这篇信函中，讨论了TiO₂缓冲层在实现高性能AgNW可拉伸电极方面的关键作用。
