scholarly journals Morphology and Ferroelectric Properties of Semiconducting/Ferroelectric Polymer Bilayers

2019 ◽  
Vol 52 (19) ◽  
pp. 7396-7402 ◽  
Author(s):  
Edgar Gutiérrez-Fernández ◽  
Esther Rebollar ◽  
Jing Cui ◽  
Tiberio A. Ezquerra ◽  
Aurora Nogales
Keyword(s):  
Ferroelectric Properties ◽  
Ferroelectric Polymer ◽  
Polymer Bilayers

An efficient route to fabricate fatigue-free P(VDF-TrFE) capacitors with enhanced piezoelectric and ferroelectric properties and excellent thermal stability for sensing and memory applications

2017 ◽  
Vol 19 (11) ◽  
pp. 7743-7750 ◽  
Author(s):  
Deepa Singh ◽  
Deepak Deepak ◽  
Ashish Garg
Keyword(s):  
Thermal Stability ◽  
Fatigue Life ◽  
Ferroelectric Properties ◽  
Piezoelectric Response ◽  
Excellent Thermal Stability ◽  
Ferroelectric Polymer ◽  
Efficient Route ◽  
Application Potential ◽  
Memory Applications

P(VDF-TrFE), the best known ferroelectric polymer, suffers from a rather low piezoelectric response as well as poor electrical fatigue life, hampering its application potential.

scholarly journals Ferroelectric Polymer Thin Films for Organic Electronics

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Manfang Mai ◽  
Shanming Ke ◽  
Peng Lin ◽  
Xierong Zeng
Keyword(s):  
Thin Films ◽  
Polymer Films ◽  
Flexible Electronics ◽  
Polyvinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Polymer Thin Films ◽  
Electronics Industry ◽  
Ferroelectric Polymer ◽  
Switching Models ◽  
Future Work

The considerable investigations of ferroelectric polymer thin films have explored new functional devices for flexible electronics industry. Polyvinylidene fluoride (PVDF) and its copolymer with trifluoroethylene (TrFE) are the most commonly used polymer ferroelectric due to their well-defined ferroelectric properties and ease of fabrication into thin films. In this study, we review the recent advances of thin ferroelectric polymer films for organic electronic applications. Initially the properties of ferroelectric polymer and fabrication methods of thin films are briefly described. Then the theoretical polarization switching models for ferroelectric polymer films are summarized and the switching mechanisms are discussed. Lastly the emerging ferroelectric devices based on P(VDF-TrFE) films are addressed. Conclusions are drawn regarding future work on materials and devices.

Epitaxial ferroelectric thin films

1994 ◽  
Vol 52 ◽  
pp. 572-573
Author(s):  
S. G. Ghonge ◽  
E. Goo ◽  
R. Ramesh ◽  
R. Haakenaasen ◽  
D. K. Fork
Keyword(s):  
Single Crystal ◽  
Work Function ◽  
Nonvolatile Memory ◽  
Ferroelectric Properties ◽  
Electrical Contact ◽  
Memory Devices ◽  
Ferroelectric Films ◽  
Si Substrates ◽  
Electro Optic ◽  
Wide Range

Microstructure of epitaxial ferroelectric/conductive oxide heterostructures on LaAIO3(LAO) and Si substrates have been studied by conventional and high resolution transmission electron microscopy. The epitaxial films have a wide range of potential applications in areas such as non-volatile memory devices, electro-optic devices and pyroelectric detectors. For applications such as electro-optic devices the films must be single crystal and for applications such as nonvolatile memory devices and pyroelectric devices single crystal films will enhance the performance of the devices. The ferroelectric films studied are Pb(Zr0.2Ti0.8)O3(PLZT), PbTiO3(PT), BiTiO3(BT) and Pb0.9La0.1(Zr0.2Ti0.8)0.975O3(PLZT).Electrical contact to ferroelectric films is commonly made with metals such as Pt. Metals generally have a large difference in work function compared to the work function of the ferroelectric oxides. This results in a Schottky barrier at the interface and the interfacial space charge is believed to responsible for domain pinning and degradation in the ferroelectric properties resulting in phenomenon such as fatigue.

Effects of LaFeO3 Additions on the Dielectric and Ferroelectric Properties of (K0.5Na0.5)NbO3 Ceramics

2013 ◽  
Vol 27 (11) ◽  
pp. 1228-1232 ◽  
Author(s):  
Hua-Lei CHENG ◽  
Hong-Liang DU ◽  
Wan-Cheng ZHOU ◽  
Fa LUO ◽  
Dong-Mei ZHU
Keyword(s):  
Ferroelectric Properties

An Investigation of the Conductive and Ferroelectric Properties of BZT Films

2020 ◽  
Vol 65 (12) ◽  
pp. 2066-2071
Author(s):  
E. V. Gushchina ◽  
B. R. Borodin ◽  
V. A. Sharov ◽  
V. V. Osipov ◽  
S. I. Pavlov ◽  
...  
Keyword(s):  
Ferroelectric Properties

Electric poling effect on capacitance of ferroelectric polymer composites

2021 ◽  
Author(s):  
S. S. Kulkarni ◽  
Arundhati H. Patil ◽  
U. V. Khadke
Keyword(s):  
Polymer Composites ◽  
Ferroelectric Polymer

scholarly journals Composite Ferroelectric Membranes Based on Vinylidene Fluoride-Tetrafluoroethylene Copolymer and Polyvinylpyrrolidone for Wound Healing

Membranes ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 21
Author(s):  
Tamara S. Tverdokhlebova ◽  
Ludmila S. Antipina ◽  
Valeriya L. Kudryavtseva ◽  
Ksenia S. Stankevich ◽  
Ilya M. Kolesnik ◽  
...  
Keyword(s):  
Wound Healing ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Composite Membranes ◽  
Modern Medicine ◽  
In Vivo Studies ◽  
Cytotoxic Effects ◽  
Complex Process ◽  
Purulent Wounds

Wound healing is a complex process and an ongoing challenge for modern medicine. Herein, we present the results of study of structure and properties of ferroelectric composite polymer membranes for wound healing. Membranes were fabricated by electrospinning from a solution of vinylidene fluoride/tetrafluoroethylene copolymer (VDF–TeFE) and polyvinylpyrrolidone (PVP) in dimethylformamide (DMF). The effects of the PVP content on the viscosity and conductivity of the spinning solution, DMF concentration, chemical composition, crystal structure, and conformation of VDF–TeFE macromolecules in the fabricated materials were studied. It was found that as PVP amount increased, the viscosity and conductivity of the spinning solutions decreased, resulting in thinner fibers. Using FTIR and XRD methods, it was shown that if the PVP content was lower than 50 wt %, the VDF–TeFE copolymer adopted a flat zigzag conformation (TTT conformation) and crystalline phases with ferroelectric properties were formed. Gas chromatography results indicated that an increase in the PVP concentration led to a higher residual amount of DMF in the material, causing cytotoxic effects on 3T3L1 fibroblasts. In vivo studies demonstrated that compared to classical gauze dressings impregnated with a solution of an antibacterial agent, ferroelectric composite membranes with 15 wt % PVP provided better conditions for the healing of purulent wounds.

scholarly journals PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix

2021 ◽  
Vol 96 ◽  
pp. 107093
Author(s):  
Vera P. Pavlović ◽  
Dragana Tošić ◽  
Radovan Dojčilović ◽  
Duško Dudić ◽  
Miroslav D. Dramićanin ◽  
...  
Keyword(s):  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Polymer Matrix ◽  
Dielectric Relaxation Process ◽  
Ferroelectric Polymer
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