Manufacturing and characterization of graphene transparent conductive films by using liquid phase exfoliation

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  • SAKAGUCHI Daiki
    Department of Applied Mechanics, Graduate School of Waseda University
  • ARAO Yoshihiko
    Department of Chemical Engineering, Tokyo Institute of Technology
  • HOSOI Atsushi
    Department of Applied Mechanics and Aerospace Engineering, Waseda University
  • KAWADA Hiroyuki
    Department of Applied Mechanics and Aerospace Engineering, Waseda University Kagami Memorial Research Institute for Materials Science and Technology, Waseda University

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Other Title
  • 液相剥離法を用いた薄層グラフェンによる透明導電膜の作製および特性評価

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<p>Transparent conductive films (TCFs) are widely used in various electronic devices. In addition, due to the excellent transparency (T=97.7%) and electrical conductivity by the effect of sp2 hybridized orbital, using graphene for the materials of TCFs is ideal. Typical method for manufacturing graphene TCFs is chemical vapor deposition (CVD) method. However, CVD method takes a high cost. On the other hand, liquid phase exfoliation (LPE) is the method for obtaining thin-layer graphene by peeling graphite in the organic solvent. In the LPE, method of making graphite oxide and peeling graphite is often used, but this method has problem that falling down conductivity due to structural defect in graphene. In this study, we used pressure homogenizer to obtain thin-layer graphene without using chemical treatment. Then, we made TCFs by using thin-layer graphene and evaluated some characteristics. Finally, we investigated transmittance and sheet resistance of the TCFs.</p>

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