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Issue 48, 2015
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The band structure of graphene oxide examined using photoluminescence spectroscopy

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Abstract

Photoluminescence (PL) spectra have been used to elucidate the band structure of graphene oxide (GO) reduced in aqueous solution. The GO reduction is measured in situ via the identification of four PL peaks produced from GO solutions with different concentrations. Using corresponding UV-visible and photoluminescence excitation (PLE) spectroscopy, and on progressing from high energy to low energy transitions, the four PL peaks are identified as σ–σ* and π–π* transitions, a π band tail due to oxygen localized states, and a π band tail due to trapped water, respectively. The labeling of the band structure has been used to challenge the prevailing assignation of the low energy transitions, reported in the literature, to molecular σ–σ* and π–π* transitions alone.

Graphical abstract: The band structure of graphene oxide examined using photoluminescence spectroscopy

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Publication details

The article was received on 30 Jan 2015, accepted on 12 Oct 2015 and first published on 16 Nov 2015


Article type: Paper
DOI: 10.1039/C5TC00307E
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J. Mater. Chem. C, 2015,3, 12484-12491
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    The band structure of graphene oxide examined using photoluminescence spectroscopy

    H. F. Liang, C. T. G. Smith, C. A. Mills and S. R. P. Silva, J. Mater. Chem. C, 2015, 3, 12484
    DOI: 10.1039/C5TC00307E

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