Structural engineering of metal-mesh structure applicable for transparent electrodes fabricated by self-formable cracked template

Yeong Gyu Kim, Young Jun Tak, Sung Pyo Park, Hee Jun Kim, Hyun Jae Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Flexible and transparent conducting electrodes are essential for future electronic devices. In this study, we successfully fabricated a highly-interconnected metal-mesh structure (MMS) using a self-formable cracked template. The template—fabricated from colloidal silica—can be easily formed and removed, presenting a simple and cost-effective way to construct a randomly and uniformly networked MMS. The structure of the MMS can be controlled by varying the spin-coating speed during the coating of the template solution or by stacking of metal-mesh layers. Through these techniques, the optical transparency and sheet resistance of the MMS can be designed for a specific purpose. A double-layered Al MMS showed high optical transparency (~80%) in the visible region, low sheet resistance (~20 Ω/sq), and good flexibility under bending test compared with a single-layered MMS, because of its highly-interconnected wire structure. Additionally, we identified the applicability of the MMS in the case of practical devices by applying it to electrodes of thin-film transistors (TFTs). The TFTs with MMS electrodes showed comparable electrical characteristics to those with conventional film-type electrodes. The cracked template can be used for the fabrication of a mesh structure consisting of any material, so it can be used for not only transparent electrodes, but also various applications such as solar cells, sensors, etc.

Original languageEnglish
Article number214
JournalNanomaterials
Volume7
Issue number8
DOIs
Publication statusPublished - 2017 Aug 5

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)

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