Analyzing a two-step polarization process in a pentacene/poly(vinylidene fluoride - Trifluoroethylene) double-layer device using Maxwell-Wagner model

Abstract

The current-voltage (I-V) measurement is one of the most common indirect measurements of ferroelectric phenomena. Here, we show that the I-V characteristic of a pentacene/poly(vinylidene fluoride - trifluoroethylene) double-layer device sandwiched between two metal electrodes can be converted into the electric field-voltage plot on the basis of the Maxwell-Wagner (MW) model. The model-predicted result is in agreement with the experimental result of the electric field, which is directly probed by optical second-harmonic generation measurement. The proposed MW model is suitable for analyzing the double-layer device with a ferroelectric layer. © 2012 American Institute of Physics.