摘要：三氧化钨因其晶体结构特点以及畸变使得三氧化钨薄膜具有许多特性，是一种优良的可致变色材料，着色效率高、可逆性好、响应时间短等是纳米结构三氧化钨薄膜的特性[1]。材料的表面形貌和结构会对材料的性质会产生很大程度的影响，微观结构的不同将使材料呈现出不同的特性[2]。本实验通过水热法，在氟掺杂氧化锡薄膜(fluorine doped tin  oxide, FTO)透明导电层上合成三氧化钨薄膜。利用水热法可以合成具有各种特殊纳米结构的材料的特性，通过水热法合成的纳米结构的三氧化钨薄膜具有更大的比表面积，且稳定性高。通过电化学测试来判断三氧化钨薄膜对电流的响应，以及薄膜的循环稳定性；通过电致变色改变薄膜对光的透过率实现对可透过光的可控。结合以上充放电过程中三氧化钨薄膜的褪变色以及对可透过光的透过率的调节，改进实验技术以及实验参数，结合现阶段三氧化钨薄膜在传感器以及智能窗等领域的应用，展望三氧化钨薄膜在这些领域的突破与进展。80982

毕业论文关键词：三氧化钨薄膜；水热法；电化学测试；电致变色；透过率

Preparation and Optical Properties of WO3 Electrochromic Films

Abstract: Due to the crystal structure characteristics and distortion, tungsten oxide thin films has many characteristics, it’s an excellent material which can be discolored。 High coloration, good reversibility, short response time and so on are the feature of nanostructureed tungsten oxide thin films。 The surface morphology and structure of the material have a great effect on the nature of the material, and the different structure of the material can make the materials show different properties。 In this experiment, tungsten oxide thin films were synthesized by hydrothermal method on a porous layer of fluorine doped tin oxide (FTO)。 The use of hydrothermal method can be synthesized with a variety of special nano-structure of the characteristics of the material, through the hydrothermal method synthesis of nanostructured tungsten oxide thin films has a greater surface area, coupled with high stability。 Through 

electrochemical testing to determine tungsten trioxide The response of the film to the current to determine, as well as the film cycle stability, by electrochromic change the films to the light transmittance to achieve controllable through the light。 Combined with the above-mentioned charge and discharge process of tungsten oxide thin films degeneration and the transmission of light through the regulation, improve the experimental techniques and experimental parameters, combined with the current stage of tungsten oxide thin films in the sensor and intelligent windows and other fields of application, Looking forward to the breakthrough and progress of tungsten trioxide films in these areas。

KeyWords: nanostructured tungsten oxide thin films; Hydrothermal method; Electrochemical testing; Electrochromic; Light transmittance

目录

1 绪论 1

1。1 WO3薄膜 1

1。1。1 WO3简介 1

1。1。2 WO3的结构 1

1。1。3 WO3薄膜的变色原理 2

1。1。4 WO3薄膜的制备方法 3

1。2 本课题研究的主要内容 4

1。2。1研究该课题的重要意义及目的 4

1。2。2实验可行方案 5

2 实验部分 6

2。1 试剂与仪器 6

2。1。1 实验所用试剂