Inkjet printing of liquid-exfoliated, highly conducting graphene/poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) nanosheets for organic electronics

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In this article, highly dispersive graphene inks are demonstrated by liquid-phase exfoliation of the bulk graphite crystal in the solvent N-methyl-2-pyrrolidone (NMP).

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Desai, Jay A.; Biswas, Chandan & Kaul, Anupama May 4, 2017.

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In this article, highly dispersive graphene inks are demonstrated by liquid-phase exfoliation of the bulk graphite crystal in the solvent N-methyl-2-pyrrolidone (NMP).

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5 p.

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Abstract: In this work, highly dispersive graphene inks are demonstrated by liquid-phase exfoliation of the bulk graphite crystal in the solvent N-methyl-2-pyrrolidone (NMP). In order to make the inks suitable for inkjet printing, an avenue to tailor the viscosity of the NMP-based ink has been developed through the addition of the organic additive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The use of PEDOT:PSS with graphene inks shows the solutions to exhibit high dispersion densities as deciphered through optical absorbance measurements, while the inkjet printed structures themselves show a uniform microstructure and typical resistivity values of approximately 0.26 mΩ m on average with graphene/PEDOT:PSS inks and can be improved further with the modification of ink properties. PEDOT:PSS as a conductive surfactant enhances the electrical conductivity of graphene patterns, and a viscosity of about 12 cP which is ideal for inkjet printing can be achieved by adding a very small amount (0.25 wt. %) of PEDOT:PSS to NMP as compared to higher amounts of nonconductive surfactants like ethyl cellulose needed to obtain similar levels of viscosity. PEDOT:PSS is a workhorse of the organic electronics industry, and this work on graphene/PEDOT:PSS composite inks provides new directions to the organic electronics industry to incorporate two-dimensional layered materials in device platforms.

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  • Journal of Vacuum Science & Technology B, 35(3), American Institute of Physics, May 04, 2017, pp. 1-5

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  • Publication Title: Journal of Vacuum Science & Technology B
  • Volume: 35
  • Issue: 3
  • Peer Reviewed: Yes

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  • May 4, 2017

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  • April 17, 2017

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  • April 23, 2021, 2:25 p.m.

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  • Dec. 8, 2023, 2:51 p.m.

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Desai, Jay A.; Biswas, Chandan & Kaul, Anupama. Inkjet printing of liquid-exfoliated, highly conducting graphene/poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) nanosheets for organic electronics, article, May 4, 2017; (https://digital.library.unt.edu/ark:/67531/metadc1783001/: accessed May 30, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Engineering.

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