Versatile Water-Based Transfer of Large-Area Graphene Films onto Flexible Substrates

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Abstract

Next-generation electronic devices are expected to demonstrate greater utility, efficiency and durability. Meanwhile, plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN) and variety of poly(para-xylylene) polymers enable transformational advantages to device shape, flexibility, weight, transparency and recyclability. Exhibiting a combination of outstanding mechanical, electrical, optical, and chemical properties of graphene with the plastic substrates could propose ideal material for the future flexible electronics. Chemical vapor deposition (CVD) allows cost-effective fabrication of a high-quality large-area graphene films, however, the critical issue is clean and noninvasive transfer of the films onto a desired substrate. The water-based delamination of CVD grown graphene on Cu can be considered as a "green" transfer process utilizing only hot deionized water. We investigated a method requiring only two essential steps: coating of 6-inch monolayer CVD graphene with transparent and flexible polymer, and Cu delamination in hot water. Proposed method is inexpensive, reproducible, environmentally friendly, waste-free and suitable for large-scale, high quality graphene. The transfer process demonstrated films with enhanced charge carrier mobility, high uniformity, free of mechanical defects, and sheet resistance as low as similar to 50 Omega/sq with 96.5 % transparency at 550 nm wavelength.

Details

Original languageEnglish
Pages (from-to)3749-3754
Number of pages6
JournalMRS Advances
Volume2
Issue number60
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

    Research areas

  • chemical vapor deposition (CVD) (chemical reaction), electrical properties, nanoscale

ID: 16964255