Polarization fatigue of organic ferroelectric capacitors

Dong Zhao, Ilias Katsouras, Mengyuan Li, Kamal Asadi, Junto Tsurumi, Gunnar Glasser, Jun Takeya, Paul W.M. Blom, Dago M. De Leeuw

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The polarization of the ferroelectric polymer P(VDF-TrFE) decreases upon prolonged cycling. Understanding of this fatigue behavior is of great technological importance for the implementation of P(VDF-TrFE) in random-access memories. However, the origin of fatigue is still ambiguous. Here we investigate fatigue in thin-film capacitors by systematically varying the frequency and amplitude of the driving waveform. We show that the fatigue is due to delamination of the top electrode. The origin is accumulation of gases, expelled from the capacitor, under the impermeable top electrode. The gases are formed by electron-induced phase decomposition of P(VDF-TrFE), similar as reported for inorganic ferroelectric materials. When the gas barrier is removed and the waveform is adapted, a fatigue-free ferroelectric capacitor based on P(VDF-TrFE) is realized. The capacitor can be cycled for more than 10 8 times, approaching the programming cycle endurance of its inorganic ferroelectric counterparts.

Original languageEnglish
Article number5075
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 27 May 2014

ASJC Scopus subject areas

  • General

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