2019 Volume 58 Issue 6 Pages 596-600
We have already reported a novel hybrid capacitor multicolor electrochromism (EC) in a single device by introducing a porous electrical double layer counter electrode. In this paper, we investigated the effect of capacitance of counter electrode on the EC properties of anodic EC molecule of phenothiazine derivative. The EC properties of 10-methylphenothiazine (MPT) was examined. The color of MPT changed from colorless to light pink during application of positive potential. ITO particle-modified counter electrodes with various thickness having different capacitance were used to fabricate ECDs. As the electrostatic capacitance of the counter electrode increased, it was found that the color change of the MPT on the working electrode has been obviously vivid. This result directly indicated that the change in electrostatic capacitance played a very important role in ECD with such a structure.