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PVDF/PMMA blend pyroelectric thin films

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Abstract

This paper will present a complete manufacturing process for obtaining pyroelectric thin film sensors composed of a blend of PVDF and PMMA polymers. These sensors comprise a stack of metallic (Ti/Pt) electrodes around an active pyroelectric layer and are able to detect a temperature variation through the pyroelectric effect. Deposition is achieved with solution using a spin-coating and hot plate drying method. Addition of PMMA is a technique for promoting the crystallization of PVDF in the β phase, with one of the PVDF polymer chain conformations producing a ferroelectric behaviour. Analysis of the role of the solvent evaporation rate has been carried out with FTIR and indicates that low temperature evaporation (below 70 °C) leads to the presence of β phase in the material. Polarization curve measurement also indicates the ferroelectric behaviour of deposited layers. Finally a thermal transient response indicates a pyroelectric coefficient of 20 μC m−2 K−1 which is close to the bulk material value (27 μC m−2 K−1).

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Authors and Affiliations

  1. IES CNRS Université Montpellier II, Place E.Bataillon, 34095, Montpellier, France

    Benoit Charlot, Sebastian Gauthier, Alexandra Garraud, Philippe Combette & Alain Giani

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  1. Benoit Charlot
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  2. Sebastian Gauthier
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  3. Alexandra Garraud
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  4. Philippe Combette
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  5. Alain Giani
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Correspondence to Benoit Charlot.

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Charlot, B., Gauthier, S., Garraud, A. et al. PVDF/PMMA blend pyroelectric thin films. J Mater Sci: Mater Electron 22, 1766–1771 (2011). https://doi.org/10.1007/s10854-011-0360-7

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  • DOI: https://doi.org/10.1007/s10854-011-0360-7

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