Li Donghai, Wang Li, Ji Wenhui, Wang Hongchen, Yue Xiaoping, Sun Qizeng, Li Lin, Zhang Chengwu, Liu Jinhua, Lu Gang, Yu Hai-Dong, Huang Wei
Institute of Advanced Materials (IAM) & Key Laboratory of Flexible Electronics (KLoFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing 211816, PR China.
Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, PR China.
ACS Appl Mater Interfaces. 2021 Jan 13;13(1):1735-1742. doi: 10.1021/acsami.0c16066. Epub 2020 Dec 23.
Transparent conductive films (TCFs) based on silver nanowires (AgNWs) are becoming one of the best candidates in realizing flexible optoelectronic devices. The AgNW-based TCF is usually prepared by coating AgNWs on a transparent polymer film; however, the coated AgNWs easily detach from the polymer underneath because of the weak adhesion between them. Herein, a network of AgNWs is embedded in the transparent hydroxypropyl methyl cellulose film, which has a strong adhesion with the AgNWs. The obtained TCF shows high optical transmittance (>85%), low roughness (rms = 4.8 ± 0.5 nm), and low haze (<0.2%). More importantly, owing to the embedding structure and strong adhesion, this TCF also shows excellent electromechanical stability, which is superior to the reported ones. Employing this TCF in a flexible electrochromic device, the obtained device exhibits excellent cyclic electromechanical stability and high coloring efficiency. Our work demonstrates a promising TCF with superior electromechanical stability for future applications in flexible optoelectronics.
基于银纳米线（AgNWs）的透明导电薄膜（TCFs）正成为实现柔性光电器件的最佳候选材料之一。基于AgNWs的TCF通常是通过将AgNWs涂覆在透明聚合物薄膜上制备的；然而，由于涂覆的AgNWs与下面的聚合物之间附着力较弱，它们很容易从聚合物上脱落。在此，AgNWs网络被嵌入到与AgNWs具有强附着力的透明羟丙基甲基纤维素薄膜中。所制备的TCF具有高光学透过率（>85%）、低粗糙度（均方根偏差=4.8±0.5nm）和低雾度（<0.2%）。更重要的是，由于其嵌入结构和强附着力，这种TCF还表现出优异的机电稳定性，优于已报道的同类材料。将这种TCF应用于柔性电致变色器件中，所制备的器件表现出优异的循环机电稳定性和高显色效率。我们的工作展示了一种具有优异机电稳定性的、有前景的TCF，可用于未来的柔性光电子学应用。
