Figure 6. Graphene based reflective electrochromic devices.

(a), Exploded-view schematic illustration of the reflective graphene-electrochromic device consisting of gold and multilayer graphene electrodes. (b,c) Photograph of the fabricated device at 0 V and 5 V applied voltage, respectively. (d), Modulation of the reflectance spectra of the devices under various applied voltages. (e), Photograph of the flexible multi-pixel reflective device. (f,g), Photographs of the reflective device under bias voltage of 0 V and 5 V that generate chessboard pattern.