Asymmetry and Rectification in Tunnel Current of All Polymer Diode

In this paper, we present the fabrication of an all polymer diode, including the substrate and the electrodes. An insulating film of polymethylmethacrylate (PMMA) is sandwiched between two polymer electrodes: a poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS) and assembled in a polyester flexible substrate. The IxV curves show not only asymmetry but also exhibit current rectification. Also, the IxV curves suggest the existence of different electron transport mechanisms in each interface metal-insulating and insulating-metal.