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 language | English |
|---|---|
| Pages (from-to) | 236-244 |
| Number of pages | 9 |
| Journal | Carbon |
| Volume | 102 |
| DOIs | |
| Publication status | Published - 1 Jun 2016 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Tuning the reduction and conductivity of solution-processed graphene oxide by intense pulsed light
AU - Al-Hamry, A.
AU - Kang, H.
AU - Sowade, E.
AU - Dzhagan, V.
AU - Rodriguez, R. D.
AU - Müller, C.
AU - Zahn, D. R.T.
AU - Baumann, R. R.
AU - Kanoun, O.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84960911765&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2016.02.045
DO - 10.1016/j.carbon.2016.02.045
M3 - Article
AN - SCOPUS:84960911765
VL - 102
SP - 236
EP - 244
JO - Carbon
JF - Carbon
SN - 0008-6223
ER -