Physically based DC lifetime model for lead zirconate titanate films

Lauren M. Garten, Manabu Hagiwara, Song Won Ko, Susan Trolier-Mckinstry

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Accurate lifetime predictions for Pb(Zr0.52Ti0.48)O3 thin films are critical for a number of applications, but current reliability models are not consistent with the resistance degradation mechanisms in lead zirconate titanate. In this work, the reliability and lifetime of chemical solution deposited (CSD) and sputtered Pb(Zr0.52Ti0.48)O3 thin films are characterized using highly accelerated lifetime testing (HALT) and leakage current-voltage (I-V) measurements. Temperature dependent HALT results and impedance spectroscopy show activation energies of approximately 1.2 eV for the CSD films and 0.6 eV for the sputtered films. The voltage dependent HALT results are consistent with previous reports, but do not clearly indicate what causes device failure. To understand more about the underlying physical mechanisms leading to degradation, the I-V data are fit to known conduction mechanisms, with Schottky emission having the best-fit and realistic extracted material parameters. Using the Schottky emission equation as a base, a unique model is developed to predict the lifetime under highly accelerated testing conditions based on the physical mechanisms of degradation.

Original languageEnglish
Article number122903
JournalApplied Physics Letters
Volume111
Issue number12
DOIs
Publication statusPublished - 2017 Sep 18

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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