Graphene Oxide Thin Films: Synthesis and Optical Characterization

Prías Barragán JJ, Gross K, Darío Perea J, Killilea NA, Heiß W, Brabec C, Calderón HA, Prieto P (2020)

Publication Type: Journal article

Publication year: 2020

Journal

ChemistrySelect Wiley-VCH

Book Volume: 5

Pages Range: 11737-11744

Journal Issue: 38

DOI: 10.1002/slct.202002481

Abstract

The oxidized derivative of graphene named Graphene oxide (GO) are attractive materials as optoelectronic devices due to their optical response in the mid-infrared wavelength spectral range; however, very large-scaled synthesis methods and optical characterization are required. Here, GO thin films are fabricated on quartz by implementing simple two-step pyrolysis processes by using renewable bamboo as source material. The effect of carbonization temperature (TCA) on the compositional, vibrational, and optoelectronic properties of the system are investigated. It was found that as TCA increases, graphite conversion rises, oxygen coverage reduces from 17 % to 4 %, and the band-gap energy monotonically decreases from 0.30 to 0.11 eV. Theoretical predictions of the energy band-gap variations with the oxide coverage obtained via density functional theory (DFT) computational simulations agree well with the experimental results, providing evidence of oxygen-mediated charge-transport scattering. Interestingly, in the optical response, increased TCA results in a blue-shift of the absorption and the absorbance spectrum can be correlated with the large size distribution of the graphitic nano-crystals of the samples. These results suggest that graphene oxide-bamboo pyroligneous acid (GO) thin films exhibit optoelectronic response useful in developing photodetectors and emitter devices in the mid-infrared (MIR) spectral range.

Authors with CRIS profile

Niall Andrew Killilea Institute Materials for Electronics and Energy Technology (i-MEET) Wolfgang Heiß Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Universidad del Quindio CO Colombia (CO) University of Valle / Universidad del Valle (Univalle) CO Colombia (CO) University of Toronto CA Canada (CA)

How to cite

APA:

Prías Barragán, J.J., Gross, K., Darío Perea, J., Killilea, N.A., Heiß, W., Brabec, C.,... Prieto, P. (2020). Graphene Oxide Thin Films: Synthesis and Optical Characterization. ChemistrySelect, 5(38), 11737-11744. https://dx.doi.org/10.1002/slct.202002481

MLA:

Prías Barragán, J. J., et al. "Graphene Oxide Thin Films: Synthesis and Optical Characterization." ChemistrySelect 5.38 (2020): 11737-11744.

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