氧化锌种子条带沉积的弯月面调控及纳米线阵列的生长机制研究

发布时间：2017-12-26 16:23

本文关键词：氧化锌种子条带沉积的弯月面调控及纳米线阵列的生长机制研究　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：氧化锌是Ⅱ-Ⅵ族半导体材料,拥有直接带隙宽度为3.37e V,激子束缚能为60me V,因其具有独特的光学性质,压电性质,磁特性以及能带调节能力而备受关注。目前,制备氧化锌的方法虽然很多,但其实各有优缺点。考虑到用溶液法制备氧化锌种子,不需要复杂设备,成本低,无需较高的反应温度,制备过程简单有效且无污染,非常适合我们进一步的研究工作。本实验用溶液法结合间歇式提拉法的方式在玻璃衬底上提拉条纹状氧化锌种子层,在制备种子层的过程中,涉及到三相交界处弯月面宏观和微观变化对制备种子的影响,本实验用CCD显微观察装置来对弯月面在提拉过程中的静态图像和动态变化进行观察,分析与研究提拉法中所涉及到的几个相关实验参数对弯月面宏观变化的影响,了解了种子颗粒在衬底上的沉积规律后,本实验通过溶液法结合间歇式提拉法的方式在衬底上制备条纹状氧化锌种子层,并对其进行相关的表征与分析。结合氧化锌种子的制备现状,本论文主要做了以下几方面的工作:首先,用CCD显微观察装置从多角度多方面对弯月面的静态图像进行分析与研究。在此过程中我们先对CCD显微观察装置所对应的物距、像距、视场大小、图片尺寸、景深及其光学成像原理做了系统的分析;然后从多角度对弯月面拍摄,对所拍摄到的弯月面及存在的影响因素进行分析验证;最后将表面改性后的衬底以及其它材料在液体中形成的弯月面与裸衬底在液体中所形成的弯月面进行对比分析,了解不同材料在液体中形成的弯月面不同的内在原因。其次,用CCD显微观察装置观察提拉过程中弯月面的动态变化,分析研究间歇式提拉法所涉及到的相关实验参数在提拉过程中对弯月面动态变化的影响,了解在玻璃衬底上提拉条纹状氧化锌种子条带时种子颗粒在衬底上的沉积机理。再次,本实验通过溶液法结合间歇式提拉法的方式在衬底上制备条纹状氧化锌种子层,并对其进行相关的表征与分析。最后,将沉积条纹状氧化锌种子层的衬底放在等摩尔浓度的硝酸锌和六次甲基四胺的去离子水溶液中恒温生长一定时间,并用光学显微镜,扫描隧道电子显微镜,X射线衍射仪,紫外可见分光光度计和荧光光谱仪对样品的形貌结构及生长状况进行表征与分析。SEM结果表明,生长所得产物为六方纤锌矿结构氧化锌,分布直径在100nm左右。XRD表明氧化锌纳米线/棒阵列沿着[001]方向的择优取向生长,而且结晶度高。紫外可见表明阵列在350nm附近具有较强的吸收峰。PL表明在380nm附近具有较高的紫外发光峰,可见光区无发光峰说明样品缺陷少。
[Abstract]:Zinc Oxide is a type of second and sixth family semiconductor materials. It has a direct gap width of 3.37e V, and an exciton binding energy of 60me V. Because of its unique optical properties, piezoelectric properties, magnetic properties and energy band adjustment capabilities, it has attracted much attention. At present, there are many ways to prepare Zinc Oxide, but it has its own advantages and disadvantages. Considering the preparation of Zinc Oxide seeds by solution method, no complex equipment is needed, low cost and high reaction temperature. The preparation process is simple, effective and pollution-free, which is very suitable for our further research work. This experiment by solution method combined with intermittent pulling method way striped Zinc Oxide pulling the seed layer on the glass substrate, in the preparation process of the seed layer, refers to the three-phase boundary meniscus of macroscopic and microscopic changes of seed preparation, the experiment used CCD microscopy to observe the static image and dynamic the changes of meniscus in the process of lifting device, analysis of the influence of several experimental parameters involved in the study and the Czochralski method on the macro changes of meniscus, understand the deposition of seed particles on the substrate after the experiment by solution method with intermittent coating method to prepare seed layer in striped Zinc Oxide on the substrate, and the characterization and Analysis on the related. Combined with the current situation of Zinc Oxide seed preparation, the following works were done in this paper. First, the static image of meniscus was analyzed and studied from multiple angles and multiple perspectives with CCD micro observation device. In this process, we first to CCD observations corresponding to the device object distance and image distance, field size, image size, depth and optical imaging principle were analyzed; then from the perspective of meniscus meniscus of shooting, captured and existing factors into the analysis of verification; finally, bending the surface modification of the substrate surface and other materials formed in the liquid meniscus and bare substrate formed in the liquid for comparative analysis, understand the intrinsic reason of meniscus of different materials formed in the liquid in different. Secondly, to observe the dynamic changes of CCD device with microscopic observation in the process of drawing the meniscus, related experimental parameters analysis of intermittent Czochralski method involves the change of meniscus dynamic in the process of lifting the understanding on the glass substrate pulling striped strip when Zinc Oxide seed seed particles on the substrate deposition mechanism. Thirdly, the stripe like Zinc Oxide seed layer was prepared on the substrate by solution method combined with intermittent Czochralski method, and its related characterization and analysis were carried out. Finally, the substrate deposition stripes on the other Zinc Oxide seed layer growth time constant temperature deionized water solution the molar concentration of zinc nitrate and six methyl four amine, and by optical microscopy, scanning tunneling microscope, X ray diffractometer, UV VIS spectrophotometer and fluorescence spectrometer on the morphology of the samples the structure and growth condition were characterized and analyzed. The results of SEM show that the growth product is six - party wurtzite structure Zinc Oxide with a diameter of about 100nm. XRD shows that the Zinc Oxide nanowires / rod arrays grow along the preferred orientation along the [001] direction and have high crystallinity. UV visible shows that the array has a strong absorption peak near 350nm. PL shows a high UV peak in the vicinity of 380nm, and there is no luminescence peak in the visible region indicating that the sample has less defect.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ132.41;TB383.1

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