SPAMPINATO, Nicoletta; MAIZ, Jon; PORTALE, Giuseppe; MAGLIONE, Mario; HADZIIOANNOU, Georges; PAVLOPOULOU, Eleni

doi:10.1016/j.polymer.2018.06.072

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SPAMPINATO, Nicoletta
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies

MAIZ, Jon
Laboratoire de Chimie des Polymères Organiques [LCPO]

PORTALE, Giuseppe
NWO DUBBLE CRG [ESRF, Netherlands Org Sci Res]
University of Groningen [Groningen]

Langue

Article de revue

Ce document a été publié dans

Polymer. 2018

Elsevier

Résumé en anglais

The functional properties of P(VDF-co-TrFE) are strongly dependent on its structure, which, in turn, depends on processing conditions applied. In this work we investigate the P(VDF-co-TrFE) processing-structure-function relationships, in order to find the thermal conditions that result in optimum ferroelectric performance in thin film configuration. Our results show that annealing temperature affects mostly the remnant polarization value, Pr, while annealing time has a severe effect on the coercive field, Ec. An optimized ferroelectric functionality, in terms of high Pr of about 90 mC/m2 and low Ec of 50 MV/m, is achieved and rationalized through structural analysis by means of GIWAXS. The best performing structure exhibits a high degree of crystallinity, a preferential orientation of the crystallites with the polymer chains parallel to the substrate and the occurrence of three ferroelectric phases. A deconvolution study demonstrates the presence of a moderately unstable ferroelectric phase that is designated to facilitate ferroelectric switching. Our findings show that a single step of 15 min annealing at 135 °C leads to high performance P(VDF-co-TrFE) structure, proving that the 2 h-long annealing step that is traditionally applied is not necessary.< Réduire

Mots clés en anglais

Ferroelectric polymers

P(vdf-trfe)

Processing

Structure-function relations

Giwaxs

URI

https://oskar-bordeaux.fr/handle/20.500.12278/20029

DOI

http://dx.doi.org/10.1016/j.polymer.2018.06.072

Project ANR

Labex AMADEUS - null
IdEx Bordeaux - ANR-10-IDEX-0003-02/10-IDEX-0003
“Plate-forme de l’Université de Bordeaux pour l’organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation” - ANR-10-EQPX-0028

Origine

Importé de hal

Unités de recherche

Laboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629