| 초록 |
Near-infrared modulation is viable from electrochemical charging in doped tungsten oxide nanocrystals, due to its localized surface plasmon resonance, promising for next-generation smart window applications. Electrochemical charging process induces ion intercalation into crystal lattice, so understanding the crystal structure of tungsten oxide is important for enhancing the modulation properties. In this presentation, strategies to improve overall optical modulation by electrochemical methods in tungsten oxide nanocrystals will be presented. First, coloration efficiency (i.e. optical density change per injected charge density) is increased by selectively inserting sodium ions into optically active hexagonal sites. Lastly, we will discuss how both of crystalline and shape anisotropy influence on the coloration efficiency and charge capacity both of which are factors that determine the overall electrochromic modulation. |
