Solid-State High-Throughput Screening for Color Tuning of Electrochromic Polymers

Diffusion of two monomers and their oxidative copolymerization inside a solid‐state gel electrolyte is utilized as a method to match the monomer feed ratio to a color resulting from a conjugated copolymer having a single absorption in the visible region. Here, a combination of two monomers is used to generate a solid‐state electrochromic device of any color, except black and green, in the colored state with all other colors going to transmissive sky blue in the bleached state.