Zy-Im有机铁电薄膜的制备与电学性能表征

摘要铁电材料具有自发极化与极化反转的特性，且具有较高的介电常数与显著的热释电、压电效应，被广泛应用于多个领域，同时也是近期研究的一大热点。Zy-Im咪唑盐是一种新型的有机铁电体，制备其薄膜并测试其电学性能，有助于对其物理性质的理解、发现其可能的应用。67818

本文采用旋涂法、饱和溶液浸泡法制备了一系列Zy-Im薄膜样品，使用原子力显微镜观察了薄膜表面形貌以及电畴的情况，并尝试用压电响应力显微镜探针对电畴进行反转；使用UV紫外-可见光分光计测试其透光率，并计算了禁带宽度。本文证实了制得的薄膜具有铁电性，并在饱和Zy-Im浸泡的薄膜上观察到了自组装现象及条纹状畴。

毕业论文关键词有机铁电体薄膜旋涂法 AFM/PFM 自组装条纹状畴

毕业设计说明书（论文）外文摘要

Title The Preparation and electrical Characterization Of Zy-Im organic ferroelectric thin film

Abstract

Ferroelectric material, possesses the characteristics of spontaneous polarization, polarization reversal, high dielectric constant, outstanding pyroelectric properties and piezoelectric effect, thus it is a hot topic in recent material researches and is promising to be widely used in many areas. The Zy-Im imidazole salt is a new organic ferroelectric material, and its preparation and electrical performance test is helpful to reveal more physical properties of itself and to discover possibility of application.

In this paper, we prepared a series of Zy-Im thin films by spin-coating technology and saturated-solution-immerse method. We verified the surface topography and electric domain structure with the aid of AFM/PFM, then try to inverse the domain by the scanning electric field of PFM probe. On the other hand, we determined its light transmittance in virtue of ultraviolet spectrophotometer and calculated the forbidden bandwidth according to it. As a result, the film has certainly ferroelectric properties due to the observation of phase/amplitude loops; Simultaneously, self-assembly phenomenon and stripe-typed domain was observed in saturated-solution-immersed thin film.

Keywords organic ferroelectric film spin-coating AFM/PFM self-assemble Stripe-typed domain

1 引言 2

1.1 铁电磁体简介 2

1.2 有机物铁电体概述 4

1.3 本文研究的内容和意义 6

2 实验方案设计与研究方法 6

2.1 实验药品及仪器 6

2.2 主要设备的工作原理 7

2.2.1旋涂机工作原理 7

2.2.2 PLD（脉冲激光沉积）工作原理 9

2.2.3AFM（原子力显微镜）/PFM（压电响应力显微镜）工作原理 10

2.3 Zy-Im铁电薄膜制备过程 12

2.4 Zy-Im铁电薄膜测试过程 13

2.4.1 AFM/PFM测试 13

2.4.2透光率测试 13

2.4.3铁电回线测试 13

3 实验数据及分析 13

3.1 透光率测定及禁带宽度计算 13

3.2 AFM/PFM获得的形貌及畴结构 Zy-Im有机铁电薄膜的制备与电学性能表征:http://www.751com.cn/cailiao/lunwen_76174.html