Electrochromic mirror using viologen-anchored nanoparticles

[Display omitted] •Three types of ECM device were fabricated using viologen-anchored ECDs.•The devices were investigated according to their optical structures.•The anti-reflection material affects the reflectance and the coloration efficiency.•The device design of ECMs is a crucial factor for clear reflected images. Electrochromic mirrors (ECMs) that are used in automobile mirrors need to have high reflectance, a high contrast ratio, and a clear image. In particular, it is critical that distortions of clear images are minimized for safety. Therefore, an ECM is fabricated using viologen-anchored nanoparticles and a magnesium fluoride (MgF2) layer with an anti-reflection function. The ECM has approximately 30.42% in the reflectance dynamic range and 125cm2/C high coloration efficiency.