Mechanism Of Electrochromic Films And Experimental Preparation

Electrochromic material refers to an optical property(reflectivity, transmissivity, absorptivity, etc.) in the stability under the action of applied electric, a reversible color change phenomenon. In the electrochromic material, the electrically conductive polymer is electrochromic material emerging member. Conductive polymer because of its unique optoelectronic properties and become very promising material. Among them, the polyaniline conductive polymer with its easy to form a stable structure, with high charge mobility, electrical characteristics of various favorable photochromic properties and photochemical stability and continue to attract people’s enthusiasm for research. Electrochromic devices, such as glare-free mirrors, smart windows, display, military camouflage, and so has a wide range of applications. Polyaniline-based conductive polymer as a very important electrochromic polymer, having outstanding electrical conductivity and good oxidation and reduction, in the visible and near-infrared region having a high optical contrast and fast response time. And, polyaniline has easy processing, fast response, rich color change and many advantages of low cost, thus becoming the focus of electrochromic electrical research. In the ITO(indium tin oxide) glass prepared polyaniline and polyaniline this thesis electrochemical constant potential method- diphenylamine sulfonate composite film structure and morphology of polyaniline were characterized, and polyaniline- diphenylamine sulfonate composite films were cyclic voltammetry, current- time curve test, UR-IR spectrophotometer testing electrochemical tests. The main content of this paper is as follows.1.The first chapter is electrochromic. From electrochromic definition electrochromic material, color electrochromic mechanism of electricity, four application specific description electrochromic power development and application of electrochromic for the third chapter, the fourth chapter of color theory provides in accordance with.2.Chapter 2. Introduction to polyaniline. From the four structures, conductive mechanism, synthesis and application of polyaniline specific introduction about the polyaniline, for the third chapter, Chapter IV laid the theoretical and experimental part basis.3. Chapter 3 synthesis and study of polyaniline discoloration. Conducting polyaniline films synthesized by electrochemical three-electrode system potentiostatic method sulfuric acid solution mixed system- in aniline. By optimizing the polymerization time and the test solution PH value obtained polyaniline film with the best performance, and its polymerization mechanism, structure, color mechanism is analyzed.4. The fourth chapter of polyaniline- diphenylamine sulfonate composite membrane preparation. Potentiostatic electrochemical method, the use of aniline and its derivatives on the ITO glass deposited polyaniline- diphenylamine sulfonate color film samples. Better quality of the sample prepared in this way obtained, and uniform surface, and then using cyclic voltammetry, the current- time curve, UR-IR spectrophotometric test on the resulting samples were associated electrochromic performance test.5.the last chapter. Conclusions and Outlook for the paper. This chapter summarizes the content of the work at the paper, the paper puts forward some deficiencies, and electrochromic cause future study presented some ideas, hope electrochromic films do deeper research in infrared absorption.