Nanostructured electrochromic films by inkjet printing on large area and flexible transparent silver electrodes

Abstract

Printed electrochromic flexible films were obtained by combining transparent silver grid electrodes formed by self-assembly and inkjet printed WO₃ nanoparticles. Concentrated dispersions of WO₃ nanoparticles were inkjet printed on transparent plastic silver grid electrodes with a high transparency of 83% in the spectral range of 400–800 nm, and a low sheet resistance in the range of 1–5 Ω sq⁻¹. These electrodes were used for electrochromic applications for the first time. The resultant patterned nanostructured electrochromic films maintained their coloring and bleaching performance after bending of the flexible films.