Fig. 1
From: Giant power factors in p- and n-type large-area graphene films on a flexible plastic substrate
a Schematic illustration of a procedure for fabricating an EDLT sample using CVD-grown large-area graphene films on a PET substrate. An optical image of the graphene-based EDLT sample with the four-point-probe configuration is also indicated. The ion gel film is a mixture of an ionic liquid, [DEME][TFSI], and an organic polymer, P(VDF-HFP). The scale bar corresponds to 1 cm. b The drain current (ID) – voltage (V4pp) curves at various gate voltages. A drain voltage ranging from −0.1 to 0.1 V was applied. c The four-point-probe electrical conductivity (σ) as a function of VG − VCNP
