| 초록 |
Electrochromism can be applied to the technology such as smart windows, smart mirrors, and display devices. Scientist have developed various inorganic and organic materials including conducting polymers to achieve high contrast, fast response time, and high stability, etc. in electrochromic devices. Various conducting polymers bearing chromophores have been designed and synthesized for the applications in electrochromic devices. For the chromphores, we chose viologen, perylene, or their derivatives. For the conducting polymers, polypyrrole, polythiophene, or thier derivatives were used. Substituents with various electron withdrawing capabilities were intorduced to affect the redox potentials as well as the colors. The monomers of conducting polymers with the chromophore were electopolymerrized on electrodes to form insoluble film. The electro chemical properties as well as the electrochromism of the polymers were studied extensively. Incorporation of the chromophore to the conducting polymer provided multiple electrochromic behavior turning the color from colorless to up to four other colored states since both the pendant and the backbone have cathodically coloring characteristics and their redox-potential ranges do not overlap each other. The polymer obtained from perylene with two pyrrole units (PDI-2Py) exhibited not only electrochromism but also photoluminescence. It was found that P(PDI-2Py) film formation by electrodeposition of PDI-2Py is one of the promising methods for multi-layer fabrications because the insoluble characteristics of the resulting film in common organic solvents allows variety in the choice of solvents for the coating of an upper layer. |
