| 초록 |
Electrochromic devices (ECDs) change their optical properties by redox reactions of EC materials, which can be actively controlled by adjusting external voltages. Important features of ECDs such as color coordinates and stability highly depend on the structure of EC materials. In this work, we revealed that symmetric viologens tend to form dimer and the device stability is decreased. To improve operational stability, we tuned N-substituents of viologen to have asymmetric molecular structure. As a result, we successfully demonstrated ECDs indicating higher performance and stability.. |
