A combination of experimental and numerical method for optimizing the sensitivity of ultra-thin piezoelectric sensor with interdigitated electrodes

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Abstract

We report the development of a finite element model (FE-model) for ultra-thin piezoelectric poly(vinylidene-trifluoroethylene) sensor with interdigitated electrodes (IDE) which includes the effect of a non-homogenous poling field determined via the combination of experimental and numerical methods. The non-homogenous poling magnitude is estimated by comparing the remanent polarization (P r) of IDE based device to the P r of the same material in metal-insulator-metal electrode configuration. The non-homogenous poling orientation is estimated by comparing the experimentally determined normal mode sensitivity (S n) values to FE-modelled sensitivity values with different poling orientation distributions. The poling orientation distribution is modelled using two approaches: (a) 33-direction parallel and perpendicular to the electrode plane and (b) 33-direction defined by an average angle. The first approach yields the best correspondence with the experimental results (R 2 = 94.70% and σ = 0.10

Original languageEnglish
Article number015006
JournalFlexible and Printed Electronics
Volume8
Issue number1
DOIs
Publication statusPublished - 2023
Publication typeA1 Journal article-refereed

Keywords

  • finite element modelling
  • flexible electronics
  • piezoelectric sensors
  • poling orientation
  • printed electronics
  • statistical modelling
  • ultra-thin electronics

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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