| 초록 |
Electrochromism (EC) is defined as reversible changes in optical properties under an applied electric field. Because of their low power consumption and high coloration efficiency, EC devices have many potential applications such as smart windows, mirrors and displays. There are several methods to prepare EC materials using physical (sputtering and evaportaion), chemical (chemical vapor deposition and sol-gel method), and electrochemical (electro or electrophoretic depositon) processes. These methods are very useful to make bulk-type electrodes, but have also difficulties in control of the electrodes in nano-scale. In contrast, a layer-by-layer (LbL) technique which is to form films by sequential adsorption of charged molecules presents many advantages in control of the electrode structure even within a single molecule by alternating pH or additives. In our presentation, EC materials are prepared by spin self-assembly using anionic and cationic polyelectrolytes and the prepared film structure are investigated as a function of deposition conditions. Their electrochemical and electrochromic properties are also discussed. |
