Polarization fatigue in ferroelectric vinylidene fluoride and trifluoroethylene copolymer thin films

Abstract

Articles you may be interested inFerroelectric switching in Langmuir-Blodgett and spin-coated thin films of poly(vinylidene fluoride/trifluoroethylene) copolymers J. Appl. Phys. 110, 064101 (2011); 10.1063/1.3636397 Polarization behavior of poly(vinylidene fluoride-trifluoroethylene) copolymer ferroelectric thin film capacitors for nonvolatile memory application in flexible electronics J. Appl. Phys. 108, 094102 (2010); 10.1063/1.3500428 Domain stabilization effect of interlayer on ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin film

Doped polymer electrodes for high performance ferroelectric capacitors on plastic substrates

“…Fatigue in P(VDFTrFE) is very sensitive to the applied field and frequency of stress cycles, with increased fatigue at high field and low frequencies. 20,21 Fatigue performance of our devices with metal electrodes is consistent with other reports in the literature at similar frequency. 20,22 Devices with bottom polymer electrodes show a slight improvement with 31% and 44% retention for highly and poorly conducting PEDOT:PSS electrodes, respectively.…”

“…20,21 Fatigue performance of our devices with metal electrodes is consistent with other reports in the literature at similar frequency. 20,22 Devices with bottom polymer electrodes show a slight improvement with 31% and 44% retention for highly and poorly conducting PEDOT:PSS electrodes, respectively. There have been various studies published on the effect of applied voltage profile, frequency, crystallinity, and operating temperature on polarization fatigue, but most of these studies were done using metal electrodes on silicon substrates.…”

High‐Performance Ferroelectric Memory Based on Phase‐Separated Films of Polymer Blends

“…[ 5 ] Here we report the fatigue performance of our capacitors with common Pt and Au electrodes under relevant and correct conditions. [ 5,8 ] Figure 7 a shows the fatigue performance of our P(VDF-TrFE)-PPO blend fi lm capacitors upto a million (10 6 ) cycles. A bipolar triangular waveform with an electric fi eld of 100 MV/m and 10 ms pulse width (100 Hz) was applied to fatigue the devices.…”

“…[ 5 ] It has been proposed that fatigue in P(VDF-TrFE) fi lm is related to the injection of charges from electrodes which are subsequently trapped at crystallite boundaries and defects, inhibiting ferroelectric switching and leading to higher fatigue rates. [ 5,8 ] To further understand the fatigue mechanism we compared the current-voltage (leakage) characteristics of the pure and blend fi lm devices after fatigue. Figure 7 c shows high leakage current through fatigued P(VDF-TrFE) fi lm while the fi lms with 6 wt% PPO content show much lower leakage after fatigue.…”

“…[4][5][6] Nonetheless fatigue continues to be a big issue when characterized at a frequency low enough at which the dipoles in the copolymer can switch and at an applied fi eld close to saturation fi eld of the ferroelectric thin fi lm. [ 7,8 ] Furthermore there are very few limited studies on the issue of thermal stability and poor breakdown strength of thin fi lm P(VDF-TrFE) ferroelectric capacitors. [ 9,10 ] In contrast to the strategy of modifying electrodes and interfaces to improve performance of polymer ferroelectric capacitors, one can look at modifying and optimizing the properties of ferroelectric thin fi lms.…”