Fabrication of Highly Transparent and Flexible NanoMesh Electrode via Self-assembly of Ultrathin Gold Nanowires

Shu Gong, Yunmeng Zhao, Lim Wei Yap, Qianqian Shi, Yan Wang, Johanis Aryo P.B. Bay, Daniel T.H. Lai, Hemayet Uddin, Wenlong Cheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Transparent electrodes simultaneously require high electrical conductivity and high optical transparency, which have been achieved with mesh metal structures. However, most currently fabricated micro- and nanoelectronic devices are produced via top-down lithography methods. Here, a bottom-up self-assembly approach to fabricate mesh electrode using ultrathin gold nanowires (AuNWs) at the air/water interface is reported. Slow partial ligand removal during the aging process is the key for the formation of such self-assembled mesh structures. The resulting mesh film has a typical mesh pore size of 8–52 μm, with a sheet resistance of ≈40 times smaller than our previously reported nonmeshed AuNWs electrodes under similar optical transmittance. Our self-assembled mesh electrodes are mechanically flexible, easily transferrable to a variety of substrates, and also patternable by marker pen lithography or cutting machine lithography, and washable, and can be directly used for touch screen and flexible interconnects for light-emitting devices. The entire fabrication process is under ambient conditions without the need for any special equipment. These attributes indicate the potential applications of self-assembled gold mesh electrodes in flexible solar cells, touch screen displays, and wearable electronics.

Original languageEnglish
Article number1600121
JournalAdvanced Electronic Materials
Volume2
Issue number7
DOIs
StatePublished - 1 Jul 2016
Externally publishedYes

Keywords

  • flexible electronics
  • mesh structures
  • self-assembly
  • transparent electrodes
  • ultrathin gold nanowires

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