◈ Electrochromism refers to the reversible color change of electrochromic materials, during the electrochemical redox reaction. For a typical example of tungsten oxide, the phenomenon is described as
WO 3 + x(Li + + e - ) <---> Li x WO3
colorless blue
● Most well-known electrochromic materials
| ♣ | Inorganic | Organic |
| Cathodic | WO3, MoO3, TiO2,... | ... |
| Anodic | NiO2, IrO2, RhO2,... | Polyaniline, Polypyrrole, Prussian blue, ... |
In order for the utilization, electrochromic materials are processed into the thin film, in which we adopt the spin coating technique.
Ultimate interest in the electrochromic materials are the fabrication of electrochromic device, which can control the transmittance or the reflectance of the incident light.
◈Practical application of electrochromic device includes the smart window, information display, rear-view mirror in the automobile, protection glassware, and etc.. Below are shown the prototype electrochromic devices developed in this lab.
Our research on the electrochromic materials are mainly focused on the new solution route to the thin film of various transition metal oxides, preferentially in a more convenient, simple and economic way. Further we are also interested in the designing of hybrid electrode materials, aiming at the superior functions of improved durability or the faster response in the electrochemical reactions.
Joo-Byoung Yoon
(yjb5841@yahoo.com)
Seong-Ju Hwang
(hwangsju@yahoo.com)
