有机分子铁电薄膜的生长和性质研究

发布时间：2018-03-27 20:23

  本文选题：功能性材料　切入点：分子基　出处：《南京大学》2017年硕士论文

【摘要】：在现在这样信息化、科技化时代,我们每个人都离不开智能化硬件,而铁电材料因为其介电性、压电性、热释电性、铁电性以及电光效应、光折变效应和非线性光学效应等重要特性,它已经被开发成为了一类比较重要的功能材料。它在信息存储、微电子、遥感等领域有重要的应用价值,铁电材料的应用推动了电子信息工业的飞速发展,具有任何其他材料都不可替代的特殊应用前景。目前应用广泛的主要是无机铁电体,比如BaTi03,PbTi03和PbZrxTii-xO3,然而昂贵的制备工艺和制备过程中产生剧毒物会限制其在新型智能设备中的应用。分子基铁电薄膜能够很好的解决上述的问题。不仅是拥有更加优异的性能,同时其在目前这种器件小型化应用上有着独天优势。二异丙胺溴晶体和4-吡啶甲胺高氯酸晶体具有较优异的铁电性能,本文期望通过制备薄膜调节其性能,为小型化器件化打下基础。本论文主要通过简单的制备仪器、方便的制备工艺,制备出了二异丙胺溴薄膜和4-吡啶甲胺高氯酸薄膜。制备出的二异丙胺溴薄膜样品的粗糙度较高,达到百纳米级别,可能这样的方式制得的薄膜并不能够大面积的工业运用;此方法能够制得单一取向的二异丙胺溴薄膜样品,且能够通过外加电场改变其生长方向。制备的4-吡啶甲胺高氯酸薄膜能够在一定区域内形成连续的平整度较高的铁电薄膜;此方法拥有其他制备方法所没有的最佳优势—使用制备技术简单且制备过程绿色无毒;制备出的薄膜样品在一定程度上能够和其单晶样品所媲美。
[Abstract]:In this age of information technology and technology, each of us is inseparable from intelligent hardware, and ferroelectric materials are due to their dielectric, piezoelectric, pyroelectric, ferroelectric and electro-optic effects. Photorefractive effect and nonlinear optical effect have been developed as a kind of important functional materials. They have important application value in the fields of information storage, microelectronics, remote sensing and so on. The application of ferroelectric materials has promoted the rapid development of electronic information industry, and has a special application prospect that any other material can not be replaced. At present, inorganic ferroelectrics are widely used. For example, BaTi03, PbTi03 and PbZrxTii-xO3, however, expensive preparation processes and the production of highly toxic substances in the preparation process will limit their application in new smart devices. Molecular based ferroelectric thin films can solve these problems very well. The diisopropylamine bromide crystal and 4-pyridylamine perchloric acid crystal have excellent ferroelectric properties. In this paper, we hope to adjust the properties of diisopropylamine bromide crystal and 4-pyridine methylamine perchloric acid crystal by preparing thin films. This paper mainly through simple preparation instrument, convenient preparation technology, Diisopropylamine bromine films and 4-pyridylamine perchloric acid films were prepared. The single orientation diisopropylamine bromine films can be prepared by this method and the growth direction can be changed by applying electric field. The prepared 4-pyridyl methylamine perchloric acid thin films can form continuous ferroelectric thin films with high flatness in a certain region. This method has the best advantages that other preparation methods do not have-simple preparation technology and green nontoxic preparation process; the prepared thin film samples can be compared to their single crystal samples to a certain extent.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O484
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本文编号：1673104