Microscale Patterning of Electrochromic Polymer Films via Soft Lithography

Figure 4

Photographs of the EC display devices with (a) negatively patterned P3HT layer at a concentration of 3.00 wt%, (b) positively patterned P3HT layer at a concentration of 3.00 wt%, and (c) positively patterned P3HT layers at a concentration of 1.00 wt%. All devices were fabricated using chloroform as a solvent. Changes in colors of the P3HT layers were clearly observed according to the reversible oxidation (upper: red) and reduction (lower: blue) reactions in the electrolyte solution.

(a)

(b)

(c)