Tuning the reduction and conductivity of solution-processed graphene oxide by intense pulsed light

A. Al-Hamry, H. Kang, E. Sowade, V. Dzhagan, R. D. Rodriguez, C. Müller, D. R.T. Zahn, R. R. Baumann, O. Kanoun

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We report about the reduction of spin-coated graphene oxide (GO) layers by intense pulsed light (IPL) treatment. The reduction is achieved in a few seconds resulting in semi-transparent graphene thin films with electrical conductivities up to 6.6 S/cm. In comparison to GO reduction by conventional thermal annealing in an oven, the IPL method is much faster, enabling applications in transparent and flexible polymer substrates. Moreover, this process is roll-to-roll compatible and chemicals-free. The parameters of IPL were optimized in order to tune the conductivity of reduced GO (rGO) films as a function of exposure energy, pulse duration, and number of pulses. The effect of IPL parameters on the morphology and the electrical properties of rGO films were investigated by vis-NIR, X-ray photoelectron, and Raman spectroscopies, as well as scanning electron microscopy, atomic force microscopy, and sheet resistance measurements. The correlation between Raman spectroscopy analysis and sheet resistance shows that the G band width can be used to evaluate the conductivity of the rGO. The IPL, in a time frame of seconds, results in higher conductivity than oven annealing of 30 min at 400 °C, which is also evidenced in the Raman spectra showing the same structural changes as X-ray photoelectron spectroscopy.

Original languageEnglish
Pages (from-to)236-244
Number of pages9
JournalCarbon
Volume102
DOIs
Publication statusPublished - 1 Jun 2016
Externally publishedYes

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Graphite
Oxides
Graphene
Tuning
Sheet resistance
Ovens
Raman spectroscopy
X ray photoelectron spectroscopy
Annealing
Oxide films
Raman scattering
Atomic force microscopy
Polymers
Electric properties
Bandwidth
Thin films
Scanning electron microscopy
Substrates

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Tuning the reduction and conductivity of solution-processed graphene oxide by intense pulsed light. / Al-Hamry, A.; Kang, H.; Sowade, E.; Dzhagan, V.; Rodriguez, R. D.; Müller, C.; Zahn, D. R.T.; Baumann, R. R.; Kanoun, O.

In: Carbon, Vol. 102, 01.06.2016, p. 236-244.

Research output: Contribution to journalArticle

Al-Hamry, A, Kang, H, Sowade, E, Dzhagan, V, Rodriguez, RD, Müller, C, Zahn, DRT, Baumann, RR & Kanoun, O 2016, 'Tuning the reduction and conductivity of solution-processed graphene oxide by intense pulsed light', Carbon, vol. 102, pp. 236-244. https://doi.org/10.1016/j.carbon.2016.02.045
Al-Hamry, A. ; Kang, H. ; Sowade, E. ; Dzhagan, V. ; Rodriguez, R. D. ; Müller, C. ; Zahn, D. R.T. ; Baumann, R. R. ; Kanoun, O. / Tuning the reduction and conductivity of solution-processed graphene oxide by intense pulsed light. In: Carbon. 2016 ; Vol. 102. pp. 236-244.
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