Adhesive electrochromic WO3 thin films fabricated using a WO3 nanoparticle-based ink

• Aqueous WO 3 nanoparticle (NP)-based electrochromic inks are fabricated. Polyvinyl alcohol (PVA) is added to ink improve its adhesion substrates. Contact angle of the NP decreases with increasing PVA content. /PVA films exhibit properties in visible and infrared ranges. The optimal content show high optical switching speeds. Nanotechnology has advanced rapidly recent years, mainly due unique basic elements, which can be tuned by altering their chemical composition size. Owing properties, nanoparticles (NPs) applied many fields, such as catalysis, electronics, coatings. In this study, we synthesized a coatable dispersed aimed highlight importance developing an appropriate design strategy for achieving physicochemical inks. was indium tin oxide-coated glass contact on substrate decreased addition PVA, indicating good wettability. Furthermore, exhibited excellent transmittance change 77 % at 633 nm coloration efficiency 35 cm 2 /C. Their near-infrared regions varied voltage, potential applications devices smart windows. Effect film formation