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Issue 10, 2014
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Facile preparation of reduced graphene oxide-based gas barrier films for organic photovoltaic devices

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Abstract

Reduced graphene oxide-based films were prepared to assess their effects as gas barriers on the stability of organic photovoltaic (OPV) devices. The direct spin-casting of a graphene oxide suspension onto an aluminum electrode was performed to encapsulate the associated OPV device with a reduced graphene oxide film. The lifetime of the OPV device after the reduction process was found to be increased by a factor of 50. The gas barrier properties of a graphene oxide layer are closely related to its surface roughness and dispersibility. Furthermore, these gas barrier properties can be enhanced by controlling the thermal reduction conditions. The thermal reduction of a graphene oxide film at a low heating rate results in a low water vapor permeability, only 0.1% of that of an as-prepared polyethylene naphthalate film. These results indicate that the dispersibility, surface roughness, and reduction conditions of a graphene oxide film significantly influence its gas barrier performance. Further investigations of the reduction of graphene oxide films are expected to enable further improvements in performance.

Graphical abstract: Facile preparation of reduced graphene oxide-based gas barrier films for organic photovoltaic devices

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Publication details

The article was received on 22 Jul 2014, accepted on 11 Aug 2014 and first published on 11 Aug 2014


Article type: Paper
DOI: 10.1039/C4EE02310B
Citation: Energy Environ. Sci., 2014,7, 3403-3411

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    Facile preparation of reduced graphene oxide-based gas barrier films for organic photovoltaic devices

    T. Kim, J. H. Kang, S. J. Yang, S. J. Sung, Y. S. Kim and C. R. Park, Energy Environ. Sci., 2014, 7, 3403
    DOI: 10.1039/C4EE02310B

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