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http://dx.doi.org/10.6117/kmeps.2014.21.2.001

Technology of Flexible Transparent Conductive Electrode for Flexible Electronic Devices  

Kim, Joo-Hyun (Graduate School of Mechanics and Design, Kookmin University)
Chon, Min-Woo (Graduate School of Mechanics and Design, Kookmin University)
Choa, Sung-Hoon (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology)
Publication Information
Journal of the Microelectronics and Packaging Society / v.21, no.2, 2014 , pp. 1-11 More about this Journal
Abstract
Flexible transparent conductive electrodes (TCEs) have recently attracted a great deal of attention owing to rapid advances in flexible electronic devices, such as flexible displays, flexible photovoltanics, and e-papers. As the performance and reliability of flexible electronics are critically affected by the quality of TCE films, it is imperative to develop TCE films with low resistivity and high transparency as well as high flexibility. Indium tin oxide (ITO) has been the most dominant transparent conducting material due to its high optical transparency and electrical conductivity. However, ITO is susceptible to cracking and delamination when it is bent or deformed. Therefore, various types of flexible TCEs, such as carbon nanotube, conducting polymers, graphene, metal mesh, Ag nanowires (NWs), and metal mesh have been extensively investigated. Among several options to replace ITO film, Ag NWs and metal mesh have been suggested as the promising candidate for flexible TCEs. In this paper, we focused on Ag NWs and metal mesh, and summarized the current development status of Ag NWs and metal mesh. The several critical issues such as high contact resistance and haze are discussed, and newly developed technologies to resolve these issues are also presented. In particular, the flexibility and durability of Ag NWs and metal mesh was compared with ITO electrode.
Keywords
transparent conductive electrode; flexible electronic device; silver nanowire; metal mesh; flexibility;
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