Highly Stable Ni-Based Flexible Transparent Conducting Panels Fabricated by Laser Digital Patterning

Vu Binh Nam, Jaeho Shin, Yeosang Yoon, Trinh Thi Giang, Jinhyeong Kwon, Young D. Suh, Junyeob Yeo, Sukjoon Hong, Seung Hwan Ko, Daeho Lee

Research output: Contribution to journalArticlepeer-review

107 Scopus citations

Abstract

A novel simple laser digital patterning process to fabricate Ni-based flexible transparent conducting panels using solution-processed nonstoichiometric nickel oxide (NiO x ) thin films and their applications for flexible transparent devices are reported in this study. A large-scale synthesis route to produce NiO x nanoparticle (NP) ink is also demonstrated. A low-power continuous-wave laser irradiation photothermochemically reduces and sinters selected areas of a NiO x NP thin film to produce Ni electrode patterns. Owing to the innovative NiO x NP ink and substantially lowered applied laser power density, Ni conductors can be fabricated, for the first time to the best of the authors' knowledge, even on a polyethylene terephthalate substrate, which is known to have one of the lowest glass-transition temperatures among polymers. The resultant Ni electrodes exhibit a high-temperature oxidation resistance up to approximately 400 °C, and high corrosion resistance in tap water and even in seawater. Moreover, a superior mechanical stability of the Ni conductors is confirmed by tape-pull, ultrasonic-bath, bending/twisting, and cyclic bending (up to 10 000 cycles) tests. Finally, flexible transparent touch screen panels and electrical heaters are fabricated with mesh-type Ni conductors to demonstrate possible applications.

Original languageEnglish
Article number1806895
JournalAdvanced Functional Materials
Volume29
Issue number8
DOIs
StatePublished - 21 Feb 2019

Keywords

  • laser digital patterning
  • Ni electrode
  • NiO nanoparticle ink
  • touch screen panels
  • transparent flexible heaters

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