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Liquid thin film dewetting-driven micropatterning of reduced graphene oxide electrodes for high performance OFETs

Title
Liquid thin film dewetting-driven micropatterning of reduced graphene oxide electrodes for high performance OFETs
Authors
Lee, Sung MinSong, Seung KeunYoon, SeongwonChung, Dae SungChang, Suk Tai
DGIST Authors
Chung, Dae Sung
Issue Date
2019-01
Citation
Journal of Materials Chemistry C, 7(1), 153-160
Type
Article
Article Type
Article
Keywords
FABRICATIONSENSORSTRANSPARENTSUPERCAPACITORSPATTERNS
ISSN
2050-7526
Abstract
We present a novel approach to produce high-resolution reduced graphene oxide (rGO) micropatterns based on a dewetting phenomenon of liquid thin films. The uniform liquid thin film of aqueous graphene oxide (GO) dispersion was formed by the meniscus dragging deposition method on a pre-patterned silanized substrate. Subsequently, selective dewetting of the water layer was induced due to the surface energy gradient on the coating substrates. After drying and chemical reduction, the high-resolution rGO micropatterns with a minimum feature size of 10 μm were realized over a large area substrate by consuming less than 1 μL of GO solution per square centimeter. As a demonstration of the application of this patterning technique, we have successfully fabricated organic field-effect transistors (OFETs) based on rGO pattern arrays as source-drain electrodes. The OFETs with the rGO electrodes exhibited a field effect mobility of 0.6 cm2 (V s)−1 with an on/off ratio of 1.79 × 106, which is higher than that of the devices with Au source-drain contacts. © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/9530
DOI
10.1039/c8tc03981j
Publisher
Royal Society of Chemistry
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringPolymer Energy Materials Lab1. Journal Articles


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