二氧化钛纳米管阵列的制备及其光电特性

发布时间：2018-03-03 02:32

本文选题：TiO2纳米管阵列　切入点：阳极氧化法　出处：《太原理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：二氧化钛（TiO2）是一种宽禁带半导体金属氧化物，广泛应用于环境监测、生物医学、气体检测、光电探测、光电转化等领域。与其传统体材料相比，其一维纳米管阵列，具有高度有序、取向性好，比表面积大、高速的电子传输通道及优异的陷光性能，在光电器件（如光电探测器、太阳能电池等）领域展现出诱人的应用前景，其重要基础是如何实现高度有序纳米管阵列的生长及其结构设计与优化。本文拟采用阳极氧化法，通过工艺的精细调控，以期实现TiO2米管阵列的可控制备，实现了具有高效光响应的光电探测器的研发，并采用新型环保型Cu2ZnSnS4(CZTS)量子点对其进行敏化，初步探索了其在太阳能电池中的应用研究。综合本论文工作，所取得的结果如下：（1）通过精细调控阳极氧化中的时间和二次氧化等关键工艺参数，实现了高度有序、长度均一、管长及管径可控的TiO2纳米管阵列的制备。（2）探索了后处理温度对TiO2纳米管晶形的影响，获得了适用于光电器件研发的锐钛矿晶形的高度有序的纳米管阵列制备。（3）采用TiO2纳米管阵列，实现了一种金属-半导体-金属（MSM）型结构的光电探测器的组装，探索了TiO2纳米管阵列结构参数对其光电探测器性能的影响，实现了高灵敏紫外光电探测器的研发，其最大光电流、光暗电流比、响应率分别为1395μA、10370和176AW-1。（4）采用“一锅法”工艺，通过工艺的探索和优化，实现了CZTS量子点的合成，其平均晶粒尺寸为5nm，晶体结构为锌黄锡矿(Kesterite)。以TiO2纳米管阵列为电子传输层，CZTS量子点为敏化剂，初步探索了其在量子点敏化太阳能电池应用研究。
[Abstract]:Titanium dioxide (TIO _ 2) is a wide band gap semiconductor metal oxide, widely used in environmental monitoring, biomedicine, gas detection, photoelectric detection, photoelectric conversion and other fields. With high order, good orientation, large specific surface area, high speed electron transmission channel and excellent trapping performance, it has shown attractive application prospects in the field of optoelectronic devices (such as photodetectors, solar cells, etc.). Its important foundation is how to realize the growth, structure design and optimization of highly ordered nanotube arrays. In this paper, anodic oxidation method is used to realize the controllable fabrication of TiO2 rice tube array and the development of photodetectors with high photoresponse. The novel environmentally friendly Cu2ZnSnS4CZTS quantum dots are used to sensitize the photodetectors. The results are as follows: (1) A preliminary exploration of its application in solar cells. 1) TiO2 nanotube arrays with high order, uniform length and controllable tube length and diameter can be fabricated by fine-tuning the key process parameters such as anodizing time and secondary oxidation. (2) the effect of post-treatment temperature on the crystal shape of TiO2 nanotubes was investigated, and a highly ordered anatase nanotube array was prepared for optoelectronic devices. The TiO2 nanotube array is used to realize the assembly of a metal-semiconductor-metal TiO2 structure photodetector. The influence of the structure parameters of the TiO2 nanotube array on the photodetector performance is explored. The high sensitive UV photodetector is developed. The maximum photocurrent, the ratio of light to dark current, and the responsivity are 1395 渭 An 10370 and 176AW-1, respectively. The synthesis of CZTS quantum dots is realized by "one pot method" process. The average grain size is 5 nm and the crystal structure is zinc-yellow tin ore Kesterite. The TiO2 nanotube array is used as the electron transport layer and the CZTS quantum dot is used as sensitizer. Its application in quantum dot-sensitized solar cells was preliminarily explored.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O614.411

【参考文献】