Fig. 9From: Enhancement of Electrochromic Properties of Polyaniline Induced by Copper Ionsa–d Digital camera images of Cu-doped PANI IR electrochromic device at different voltages. e The emissivity value (ε) of Cu-doped PANI IR electrochromic device at regions of the spectrum (3–5 µm and 8–12 µm). f The CA curves of 1st and 50th cycles of the Cu-doped PANI IR electrochromic device at 0.8 V and -0.8 VBack to article page