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Performance Improvement for Poly(Vinylidene Fluoride-trifluoroethylene) Ferroelectric Nano-film

Author: ZhangYanNi
Tutor: XuHaiSheng
School: East China University of Science and Technology
Course: Atomic and Molecular Physics
Keywords: Ferroelectric thin films Hydrogen ions Poled
CLC: O484.4
Type: Master's thesis
Year: 2011
Downloads: 85
Quote: 0
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Abstract


Ferroelectric polymer is a low sintering temperature , easy processing and low cost. Ferroelectric polymer made ??of nano- film can occur at a low voltage polarization inversion , these advantages make the poly ( vinylidene fluoride, a copolymer of ethylene - vinyl trifluoroacetate ) P (VDF-TrFE) is representative of an organic ferroelectric high the molecule has attracted more and more attention . The first part of this article provides a brief overview of the organic ferroelectric material PVDF and its copolymers ; influencing factors of the second part of its film properties systematically discussed ; based on the experimental results , the device structure contains a buffer layer sandwich structure , can effectively improve the ferroelectric properties of the film , so the third part and the fourth part analyzes the main factors to improve the performance of ferroelectric thin film devices in the experiment using the same sandwich structure , simply by adjusting the cushioning material ( such as polyethylene stays two thiophene oxide - polystyrene sulfonic acid (PEDOT-PSSH) the ratio of the two ), and the introduction of polyvinylphosphonic acid (PVPA) to get different ferroelectric properties as cushioning material , and to arrive at a hydrogen ion is to affect the ferroelectric properties the conclusions of the most critical factors , which is due to the hydrogen ion can act as a charge compensation and thereby stabilizing the ferroelectric domain, to further improve the performance of ferroelectric . PVDF copolymers and terpolymers of potential applications in the ferroelectric capacitor and memory , the last two parts of a preliminary study and discussion .

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics > The nature of the films
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