Multiscale understanding of electric polarization in poly(vinylidene fluoride)-based ferroelectric polymers

Abstract

Poly(vinylidene fluoride) (PVDF) and PVDF-based copolymers with trifluoroethylene (PVDF-TrFE) have attracted considerable academic and industrial interest due to their ferroelectric properties, which are only presented in very few polymers. However,...

Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

“…1a, b show the composite nano-and microstructure of P(VDF-TrFE) given by high-resolution bimodal AFM. The polymer crystallises in the form of rice-like domains, consisting of stacks of lamellae 17,18,[37][38][39] . The polymer chains are ordered in crystalline formations within the platelet-like lamellae, while in the gaps between lamellae the polymer chains adopt a disordered conformation, which produces the amorphous interlamellar regions.…”

Surface silanized MWCNTs doped PVDF nanocomposite with self-organized dipoles: an intrinsic study on the dielectric, piezoelectric, ferroelectric, and energy harvesting phenomenology

“…Orientation polarization occurs when there is a permanent dipole moment in the material. 39 When an external electrical eld (in our case 1 V) is applied across the PVDF material, a permanent dipole moment arises due to the C-F bond. Furthermore, higher dipole (C-F) orientation inside the polymer matrix in the direction of the applied electrical eld leads to orientation polarization.…”

“…This increased polar b-phase contributed to the high dielectric constant (relative permittivity) governed by orientation polarization. 39,40 The overall increment in dielectric constant in the PVDF nanocomposite is the synergistic contributions from orientation and interfacial polarization. Similarly, Fig.…”

Ferroelectric Polymer Drives Performance Enhancement of Non‐fullerene Organic Solar Cells

“…Ferroelectrics polymers are a type of polymer crystal materials with ferroelectricity. The spontaneous polarization of the ferroelectric dipoles can be readily switched by the applied electric field and induce a stable and controllable internal electric field in optoelectronic devices [21–26] . At present, researchers have made some successful attempts on ferroelectric materials in the field of perovskite solar cells [27–30] .…”